The data area passed to a system call is too small (code=122

BlackTornado

Hello,

I am trying to setup (first time for me) an OpenVPN server out of a router with OpenWRT, and a Windows 10 OpenVPN client

I managed to have the client connecting to the VPN, but when I actually try to browse, I get the following in the client log:

write to TUN/TAP : The data area passed to a system call is too small.   (code=122)

I haven't been able to figure out what is wrong with my configuration, so I'm here asking for help.

Server config:

config openvpn 'vpn0'
	option enabled '1'
	option dev 'tun'
	option port '1194'
	option proto 'udp'
	option verb '3'
	option ca '/etc/openvpn/ca.crt'
	option cert '/etc/openvpn/server.crt'
	option key '/etc/openvpn/server.key'
	option server '10.8.0.0 255.255.255.0'
	option comp_lzo 'yes'
	option status '/var/log/openvpn_status.log'
	option log '/tmp/openvpn.log'
	option mute '5'
	option keepalive '10 120'
	option persist_key '1'
	option persist_tun '1'
	option user 'nobody'
	option group 'nogroup'
	option dh '/etc/easy-rsa/keys/dh1024.pem'
	option mode 'server'
	option tls_server '1'
	option topology 'subnet'
	option route_gateway 'dhcp'
	option client_to_client '1'
	list push 'comp-lzo yes'
	list push 'persist-key'
	list push 'persist-tun'
	list push 'user nobody'
	list push 'user nogroup'
	list push 'topology subnet'
	list push 'route-gateway dhcp'
	list push 'redirect-gateway def1'
	list push 'route 10.10.1.0 255.255.255.0'
	list push 'dhcp-option DNS 107.170.95.180'
	list push 'dhcp-option DNS 50.116.40.226'

Client config:

dev tun

proto udp

ca   ca.crt
cert client1.crt
key  client1.key

client
remote-cert-tls server
remote 46.xxx.xxx.122 1194

#Things I added trying to troubleshoot
verb 5
tun-mtu 1500
tun-mtu-extra 32

I read on the forum that this problem may be related to the MTU size and/or to lzo compression, but lzo compression seems to be activated to both client and server.
I am not really sure about MTU size, but a log from the client says the following:

Sun Oct 18 22:07:07 2015 us=238846 Current Parameter Settings:
Sun Oct 18 22:07:07 2015 us=238846   config = 'OpenWRT.ovpn'
Sun Oct 18 22:07:07 2015 us=238846   mode = 0
Sun Oct 18 22:07:07 2015 us=238846   show_ciphers = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   show_digests = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   show_engines = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   genkey = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   key_pass_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   show_tls_ciphers = DISABLED
Sun Oct 18 22:07:07 2015 us=238846 Connection profiles [default]:
Sun Oct 18 22:07:07 2015 us=238846   proto = udp
Sun Oct 18 22:07:07 2015 us=238846   local = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   local_port = 1194
Sun Oct 18 22:07:07 2015 us=238846   remote = '46.162.119.122'
Sun Oct 18 22:07:07 2015 us=238846   remote_port = 1194
Sun Oct 18 22:07:07 2015 us=238846   remote_float = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   bind_defined = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   bind_local = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   connect_retry_seconds = 5
Sun Oct 18 22:07:07 2015 us=238846   connect_timeout = 10
Sun Oct 18 22:07:07 2015 us=238846   connect_retry_max = 0
Sun Oct 18 22:07:07 2015 us=238846   socks_proxy_server = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   socks_proxy_port = 0
Sun Oct 18 22:07:07 2015 us=238846   socks_proxy_retry = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   tun_mtu = 1500
Sun Oct 18 22:07:07 2015 us=238846   tun_mtu_defined = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   link_mtu = 1500
Sun Oct 18 22:07:07 2015 us=238846   link_mtu_defined = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   tun_mtu_extra = 32
Sun Oct 18 22:07:07 2015 us=238846   tun_mtu_extra_defined = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   mtu_discover_type = -1
Sun Oct 18 22:07:07 2015 us=238846   fragment = 0
Sun Oct 18 22:07:07 2015 us=238846   mssfix = 1450
Sun Oct 18 22:07:07 2015 us=238846   explicit_exit_notification = 0
Sun Oct 18 22:07:07 2015 us=238846 Connection profiles END
Sun Oct 18 22:07:07 2015 us=238846   remote_random = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   ipchange = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   dev = 'tun'
Sun Oct 18 22:07:07 2015 us=238846   dev_type = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   dev_node = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   lladdr = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   topology = 1
Sun Oct 18 22:07:07 2015 us=238846   tun_ipv6 = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   ifconfig_local = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   ifconfig_remote_netmask = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   ifconfig_noexec = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   ifconfig_nowarn = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   ifconfig_ipv6_local = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   ifconfig_ipv6_netbits = 0
Sun Oct 18 22:07:07 2015 us=238846   ifconfig_ipv6_remote = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   shaper = 0
Sun Oct 18 22:07:07 2015 us=238846   mtu_test = 0
Sun Oct 18 22:07:07 2015 us=238846   mlock = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   keepalive_ping = 0
Sun Oct 18 22:07:07 2015 us=238846   keepalive_timeout = 0
Sun Oct 18 22:07:07 2015 us=238846   inactivity_timeout = 0
Sun Oct 18 22:07:07 2015 us=238846   ping_send_timeout = 0
Sun Oct 18 22:07:07 2015 us=238846   ping_rec_timeout = 0
Sun Oct 18 22:07:07 2015 us=238846   ping_rec_timeout_action = 0
Sun Oct 18 22:07:07 2015 us=238846   ping_timer_remote = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   remap_sigusr1 = 0
Sun Oct 18 22:07:07 2015 us=238846   persist_tun = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   persist_local_ip = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   persist_remote_ip = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   persist_key = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   passtos = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   resolve_retry_seconds = 1000000000
Sun Oct 18 22:07:07 2015 us=238846   username = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   groupname = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   chroot_dir = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   cd_dir = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   writepid = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   up_script = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   down_script = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   down_pre = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   up_restart = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   up_delay = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   daemon = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   inetd = 0
Sun Oct 18 22:07:07 2015 us=238846   log = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   suppress_timestamps = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   nice = 0
Sun Oct 18 22:07:07 2015 us=238846   verbosity = 5
Sun Oct 18 22:07:07 2015 us=238846   mute = 0
Sun Oct 18 22:07:07 2015 us=238846   status_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   status_file_version = 1
Sun Oct 18 22:07:07 2015 us=238846   status_file_update_freq = 60
Sun Oct 18 22:07:07 2015 us=238846   occ = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   rcvbuf = 0
Sun Oct 18 22:07:07 2015 us=238846   sndbuf = 0
Sun Oct 18 22:07:07 2015 us=238846   sockflags = 0
Sun Oct 18 22:07:07 2015 us=238846   fast_io = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   lzo = 0
Sun Oct 18 22:07:07 2015 us=238846   route_script = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   route_default_gateway = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   route_default_metric = 0
Sun Oct 18 22:07:07 2015 us=238846   route_noexec = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   route_delay = 5
Sun Oct 18 22:07:07 2015 us=238846   route_delay_window = 30
Sun Oct 18 22:07:07 2015 us=238846   route_delay_defined = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   route_nopull = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   route_gateway_via_dhcp = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   max_routes = 100
Sun Oct 18 22:07:07 2015 us=238846   allow_pull_fqdn = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   management_addr = '127.0.0.1'
Sun Oct 18 22:07:07 2015 us=238846   management_port = 25340
Sun Oct 18 22:07:07 2015 us=238846   management_user_pass = 'stdin'
Sun Oct 18 22:07:07 2015 us=238846   management_log_history_cache = 250
Sun Oct 18 22:07:07 2015 us=238846   management_echo_buffer_size = 100
Sun Oct 18 22:07:07 2015 us=238846   management_write_peer_info_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   management_client_user = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   management_client_group = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   management_flags = 6
Sun Oct 18 22:07:07 2015 us=238846   shared_secret_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   key_direction = 0
Sun Oct 18 22:07:07 2015 us=238846   ciphername_defined = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   ciphername = 'BF-CBC'
Sun Oct 18 22:07:07 2015 us=238846   authname_defined = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   authname = 'SHA1'
Sun Oct 18 22:07:07 2015 us=238846   prng_hash = 'SHA1'
Sun Oct 18 22:07:07 2015 us=238846   prng_nonce_secret_len = 16
Sun Oct 18 22:07:07 2015 us=238846   keysize = 0
Sun Oct 18 22:07:07 2015 us=238846   engine = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   replay = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   mute_replay_warnings = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   replay_window = 64
Sun Oct 18 22:07:07 2015 us=238846   replay_time = 15
Sun Oct 18 22:07:07 2015 us=238846   packet_id_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   use_iv = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   test_crypto = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   tls_server = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   tls_client = ENABLED
Sun Oct 18 22:07:07 2015 us=238846   key_method = 2
Sun Oct 18 22:07:07 2015 us=238846   ca_file = 'ca.crt'
Sun Oct 18 22:07:07 2015 us=238846   ca_path = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   dh_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   cert_file = 'client1.crt'
Sun Oct 18 22:07:07 2015 us=238846   priv_key_file = 'client1.key'
Sun Oct 18 22:07:07 2015 us=238846   pkcs12_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   cryptoapi_cert = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   cipher_list = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   tls_verify = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   tls_export_cert = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   verify_x509_type = 0
Sun Oct 18 22:07:07 2015 us=238846   verify_x509_name = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   crl_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   ns_cert_type = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 160
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 136
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_ku[i] = 0
Sun Oct 18 22:07:07 2015 us=238846   remote_cert_eku = 'TLS Web Server Authentication'
Sun Oct 18 22:07:07 2015 us=238846   ssl_flags = 0
Sun Oct 18 22:07:07 2015 us=238846   tls_timeout = 2
Sun Oct 18 22:07:07 2015 us=238846   renegotiate_bytes = 0
Sun Oct 18 22:07:07 2015 us=238846   renegotiate_packets = 0
Sun Oct 18 22:07:07 2015 us=238846   renegotiate_seconds = 3600
Sun Oct 18 22:07:07 2015 us=238846   handshake_window = 60
Sun Oct 18 22:07:07 2015 us=238846   transition_window = 3600
Sun Oct 18 22:07:07 2015 us=238846   single_session = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   push_peer_info = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   tls_exit = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   tls_auth_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_protected_authentication = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_private_mode = 00000000
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_cert_private = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_pin_cache_period = -1
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_id = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=238846   pkcs11_id_management = DISABLED
Sun Oct 18 22:07:07 2015 us=238846   server_network = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=238846   server_netmask = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   server_network_ipv6 = ::
Sun Oct 18 22:07:07 2015 us=254473   server_netbits_ipv6 = 0
Sun Oct 18 22:07:07 2015 us=254473   server_bridge_ip = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   server_bridge_netmask = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   server_bridge_pool_start = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   server_bridge_pool_end = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_pool_defined = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_pool_start = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_pool_end = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_pool_netmask = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_pool_persist_filename = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_pool_persist_refresh_freq = 600
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_ipv6_pool_defined = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_ipv6_pool_base = ::
Sun Oct 18 22:07:07 2015 us=254473   ifconfig_ipv6_pool_netbits = 0
Sun Oct 18 22:07:07 2015 us=254473   n_bcast_buf = 256
Sun Oct 18 22:07:07 2015 us=254473   tcp_queue_limit = 64
Sun Oct 18 22:07:07 2015 us=254473   real_hash_size = 256
Sun Oct 18 22:07:07 2015 us=254473   virtual_hash_size = 256
Sun Oct 18 22:07:07 2015 us=254473   client_connect_script = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   learn_address_script = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   client_disconnect_script = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   client_config_dir = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   ccd_exclusive = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   tmp_dir = 'C:\Users\d_abb\AppData\Local\Temp\'
Sun Oct 18 22:07:07 2015 us=254473   push_ifconfig_defined = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   push_ifconfig_local = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   push_ifconfig_remote_netmask = 0.0.0.0
Sun Oct 18 22:07:07 2015 us=254473   push_ifconfig_ipv6_defined = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   push_ifconfig_ipv6_local = ::/0
Sun Oct 18 22:07:07 2015 us=254473   push_ifconfig_ipv6_remote = ::
Sun Oct 18 22:07:07 2015 us=254473   enable_c2c = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   duplicate_cn = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   cf_max = 0
Sun Oct 18 22:07:07 2015 us=254473   cf_per = 0
Sun Oct 18 22:07:07 2015 us=254473   max_clients = 1024
Sun Oct 18 22:07:07 2015 us=254473   max_routes_per_client = 256
Sun Oct 18 22:07:07 2015 us=254473   auth_user_pass_verify_script = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   auth_user_pass_verify_script_via_file = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   client = ENABLED
Sun Oct 18 22:07:07 2015 us=254473   pull = ENABLED
Sun Oct 18 22:07:07 2015 us=254473   auth_user_pass_file = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   show_net_up = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   route_method = 0
Sun Oct 18 22:07:07 2015 us=254473   ip_win32_defined = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   ip_win32_type = 3
Sun Oct 18 22:07:07 2015 us=254473   dhcp_masq_offset = 0
Sun Oct 18 22:07:07 2015 us=254473   dhcp_lease_time = 31536000
Sun Oct 18 22:07:07 2015 us=254473   tap_sleep = 0
Sun Oct 18 22:07:07 2015 us=254473   dhcp_options = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   dhcp_renew = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   dhcp_pre_release = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   dhcp_release = DISABLED
Sun Oct 18 22:07:07 2015 us=254473   domain = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   netbios_scope = '[UNDEF]'
Sun Oct 18 22:07:07 2015 us=254473   netbios_node_type = 0
Sun Oct 18 22:07:07 2015 us=254473   disable_nbt = DISABLED
Sun Oct 18 22:07:07 2015 us=254473 OpenVPN 2.3.8 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Aug  4 2015
Sun Oct 18 22:07:07 2015 us=254473 library versions: OpenSSL 1.0.1p 9 Jul 2015, LZO 2.08
Enter Management Password:
Sun Oct 18 22:07:07 2015 us=254473 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25340
Sun Oct 18 22:07:07 2015 us=254473 Need hold release from management interface, waiting...
Sun Oct 18 22:07:07 2015 us=754502 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:25340
Sun Oct 18 22:07:07 2015 us=863908 MANAGEMENT: CMD 'state on'
Sun Oct 18 22:07:07 2015 us=863908 MANAGEMENT: CMD 'log all on'
Sun Oct 18 22:07:07 2015 us=973259 MANAGEMENT: CMD 'hold off'
Sun Oct 18 22:07:07 2015 us=973259 MANAGEMENT: CMD 'hold release'
Sun Oct 18 22:07:08 2015 us=67015 Control Channel MTU parms [ L:1573 D:138 EF:38 EB:0 ET:0 EL:3 ]
Sun Oct 18 22:07:08 2015 us=67015 Socket Buffers: R=[65536->65536] S=[65536->65536]
Sun Oct 18 22:07:08 2015 us=67015 Data Channel MTU parms [ L:1573 D:1450 EF:41 EB:12 ET:32 EL:3 ]
Sun Oct 18 22:07:08 2015 us=67015 Local Options String: 'V4,dev-type tun,link-mtu 1573,tun-mtu 1532,proto UDPv4,cipher BF-CBC,auth SHA1,keysize 128,key-method 2,tls-client'
Sun Oct 18 22:07:08 2015 us=67015 Expected Remote Options String: 'V4,dev-type tun,link-mtu 1573,tun-mtu 1532,proto UDPv4,cipher BF-CBC,auth SHA1,keysize 128,key-method 2,tls-server'
Sun Oct 18 22:07:08 2015 us=67015 Local Options hash (VER=V4): 'f61b8fe4'
Sun Oct 18 22:07:08 2015 us=67015 Expected Remote Options hash (VER=V4): '56af8162'
Sun Oct 18 22:07:08 2015 us=67015 UDPv4 link local (bound): [undef]
Sun Oct 18 22:07:08 2015 us=67015 UDPv4 link remote: [AF_INET]46.162.119.122:1194
Sun Oct 18 22:07:08 2015 us=67015 MANAGEMENT: >STATE:1445198828,WAIT,,,
Sun Oct 18 22:07:08 2015 us=317046 MANAGEMENT: >STATE:1445198828,AUTH,,,
Sun Oct 18 22:07:08 2015 us=317046 TLS: Initial packet from [AF_INET]46.162.119.122:1194, sid=1c1db529 9f09ea92
Sun Oct 18 22:07:08 2015 us=738945 VERIFY OK: depth=1, C=SE, ST=Sweden, L=Linkoping, O=Daniele, OU=Daniele, CN=Daniele CA, name=EasyRSA, emailAddress=d_abbatelli@hotmail.com
Sun Oct 18 22:07:08 2015 us=738945 Validating certificate key usage
Sun Oct 18 22:07:08 2015 us=738945 ++ Certificate has key usage  00a0, expects 00a0
Sun Oct 18 22:07:08 2015 us=738945 VERIFY KU OK
Sun Oct 18 22:07:08 2015 us=738945 Validating certificate extended key usage
Sun Oct 18 22:07:08 2015 us=738945 ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication
Sun Oct 18 22:07:08 2015 us=738945 VERIFY EKU OK
Sun Oct 18 22:07:08 2015 us=738945 VERIFY OK: depth=0, C=SE, ST=Sweden, L=Linkoping, O=Daniele, OU=Daniele, CN=server, name=EasyRSA, emailAddress=d_abbatelli@hotmail.com
Sun Oct 18 22:07:09 2015 us=254607 NOTE: Options consistency check may be skewed by version differences
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'version' is used inconsistently, local='version V4', remote='version V0 UNDEF'
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'dev-type' is present in local config but missing in remote config, local='dev-type tun'
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'link-mtu' is present in local config but missing in remote config, local='link-mtu 1573'
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'tun-mtu' is present in local config but missing in remote config, local='tun-mtu 1532'
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'cipher' is present in local config but missing in remote config, local='cipher BF-CBC'
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'auth' is present in local config but missing in remote config, local='auth SHA1'
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'keysize' is present in local config but missing in remote config, local='keysize 128'
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'key-method' is present in local config but missing in remote config, local='key-method 2'
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'tls-server' is present in local config but missing in remote config, local='tls-server'
Sun Oct 18 22:07:09 2015 us=254607 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Sun Oct 18 22:07:09 2015 us=254607 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Sun Oct 18 22:07:09 2015 us=254607 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Sun Oct 18 22:07:09 2015 us=254607 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Sun Oct 18 22:07:09 2015 us=254607 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA
Sun Oct 18 22:07:09 2015 us=254607 [server] Peer Connection Initiated with [AF_INET]46.162.119.122:1194
Sun Oct 18 22:07:10 2015 us=317149 MANAGEMENT: >STATE:1445198830,GET_CONFIG,,,
Sun Oct 18 22:07:11 2015 us=379714 SENT CONTROL [server]: 'PUSH_REQUEST' (status=1)
Sun Oct 18 22:07:11 2015 us=582850 PUSH: Received control message: 'PUSH_REPLY,comp-lzo yes,persist-key,persist-tun,user nobody,user nogroup,topology subnet,route-gateway dhcp,redirect-gateway def1,route 10.10.1.0 255.255.255.0,dhcp-option DNS 107.170.95.180,dhcp-option DNS 50.116.40.226,route-gateway 10.8.0.1,topology subnet,ping 10,ping-restart 120,ifconfig 10.8.0.2 255.255.255.0'
Sun Oct 18 22:07:11 2015 us=582850 Options error: option 'user' cannot be used in this context ([PUSH-OPTIONS])
Sun Oct 18 22:07:11 2015 us=582850 Options error: option 'user' cannot be used in this context ([PUSH-OPTIONS])
Sun Oct 18 22:07:11 2015 us=582850 OPTIONS IMPORT: timers and/or timeouts modified
Sun Oct 18 22:07:11 2015 us=582850 OPTIONS IMPORT: --persist options modified
Sun Oct 18 22:07:11 2015 us=582850 OPTIONS IMPORT: --ifconfig/up options modified
Sun Oct 18 22:07:11 2015 us=582850 OPTIONS IMPORT: route options modified
Sun Oct 18 22:07:11 2015 us=582850 OPTIONS IMPORT: route-related options modified
Sun Oct 18 22:07:11 2015 us=582850 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Sun Oct 18 22:07:11 2015 us=629714 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Sun Oct 18 22:07:11 2015 us=629714 MANAGEMENT: >STATE:1445198831,ASSIGN_IP,,10.8.0.2,
Sun Oct 18 22:07:11 2015 us=629714 open_tun, tt->ipv6=0
Sun Oct 18 22:07:11 2015 us=629714 TAP-WIN32 device [Ethernet 2] opened: \\.\Global\{99A72A16-1971-4158-9EEA-E16B44FD9527}.tap
Sun Oct 18 22:07:11 2015 us=629714 TAP-Windows Driver Version 9.21 
Sun Oct 18 22:07:11 2015 us=629714 TAP-Windows MTU=1500
Sun Oct 18 22:07:11 2015 us=629714 Set TAP-Windows TUN subnet mode network/local/netmask = 10.8.0.0/10.8.0.2/255.255.255.0 [SUCCEEDED]
Sun Oct 18 22:07:11 2015 us=629714 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.8.0.2/255.255.255.0 on interface {99A72A16-1971-4158-9EEA-E16B44FD9527} [DHCP-serv: 10.8.0.254, lease-time: 31536000]
Sun Oct 18 22:07:11 2015 us=629714 DHCP option string: 06086baa 5fb43274 28e2
Sun Oct 18 22:07:11 2015 us=629714 Successful ARP Flush on interface [12] {99A72A16-1971-4158-9EEA-E16B44FD9527}
Sun Oct 18 22:07:16 2015 us=941308 TEST ROUTES: 2/2 succeeded len=1 ret=1 a=0 u/d=up
Sun Oct 18 22:07:16 2015 us=941308 C:\WINDOWS\system32\route.exe ADD 46.162.119.122 MASK 255.255.255.255 192.168.43.1
Sun Oct 18 22:07:16 2015 us=941308 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=25 and dwForwardType=4
Sun Oct 18 22:07:16 2015 us=941308 Route addition via IPAPI succeeded [adaptive]
Sun Oct 18 22:07:16 2015 us=941308 C:\WINDOWS\system32\route.exe ADD 0.0.0.0 MASK 128.0.0.0 10.8.0.1
Sun Oct 18 22:07:16 2015 us=941308 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=20 and dwForwardType=4
Sun Oct 18 22:07:16 2015 us=941308 Route addition via IPAPI succeeded [adaptive]
Sun Oct 18 22:07:16 2015 us=941308 C:\WINDOWS\system32\route.exe ADD 128.0.0.0 MASK 128.0.0.0 10.8.0.1
Sun Oct 18 22:07:16 2015 us=941308 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=20 and dwForwardType=4
Sun Oct 18 22:07:16 2015 us=941308 Route addition via IPAPI succeeded [adaptive]
Sun Oct 18 22:07:16 2015 us=941308 MANAGEMENT: >STATE:1445198836,ADD_ROUTES,,,
Sun Oct 18 22:07:16 2015 us=941308 C:\WINDOWS\system32\route.exe ADD 10.10.1.0 MASK 255.255.255.0 10.8.0.1
Sun Oct 18 22:07:16 2015 us=941308 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=20 and dwForwardType=4
Sun Oct 18 22:07:16 2015 us=941308 Route addition via IPAPI succeeded [adaptive]
Sun Oct 18 22:07:16 2015 us=941308 Initialization Sequence Completed
Sun Oct 18 22:07:16 2015 us=941308 MANAGEMENT: >STATE:1445198836,CONNECTED,SUCCESS,10.8.0.2,46.162.119.122
Sun Oct 18 22:07:31 2015 us=983581 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Sun Oct 18 22:07:41 2015 us=705122 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Sun Oct 18 22:07:43 2015 us=111426 TCP/UDP: Closing socket
Sun Oct 18 22:07:43 2015 us=111426 C:\WINDOWS\system32\route.exe DELETE 10.10.1.0 MASK 255.255.255.0 10.8.0.1
Sun Oct 18 22:07:43 2015 us=111426 Route deletion via IPAPI succeeded [adaptive]
Sun Oct 18 22:07:43 2015 us=111426 C:\WINDOWS\system32\route.exe DELETE 46.162.119.122 MASK 255.255.255.255 192.168.43.1
Sun Oct 18 22:07:43 2015 us=111426 Route deletion via IPAPI succeeded [adaptive]
Sun Oct 18 22:07:43 2015 us=111426 C:\WINDOWS\system32\route.exe DELETE 0.0.0.0 MASK 128.0.0.0 10.8.0.1
Sun Oct 18 22:07:43 2015 us=127041 Route deletion via IPAPI succeeded [adaptive]
Sun Oct 18 22:07:43 2015 us=127041 C:\WINDOWS\system32\route.exe DELETE 128.0.0.0 MASK 128.0.0.0 10.8.0.1
Sun Oct 18 22:07:43 2015 us=127041 Route deletion via IPAPI succeeded [adaptive]
Sun Oct 18 22:07:43 2015 us=127041 Closing TUN/TAP interface
Sun Oct 18 22:07:43 2015 us=127041 SIGTERM[hard,] received, process exiting
Sun Oct 18 22:07:43 2015 us=127041 MANAGEMENT: >STATE:1445198863,EXITING,SIGTERM,,

Any idea what's wrong?

Traffic

BlackTornado wroteAny idea what's wrong?

Client Version:

BlackTornado wroteSun Oct 18 22:07:07 2015 us=254473 OpenVPN 2.3.8 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Aug 4 2015

Server Version: :?:
Check your server version especially due to this error:

BlackTornado wroteSun Oct 18 22:07:09 2015 us=254607 NOTE: Options consistency check may be skewed by version differences
Sun Oct 18 22:07:09 2015 us=254607 WARNING: 'version' is used inconsistently, local='version V4', remote='version V0 UNDEF'

Comp-lzo:

BlackTornado wroteoption comp_lzo 'yes'
list push 'comp-lzo yes'

Looks ok.

BlackTornado wroteSun Oct 18 22:07:11 2015 us=582850 Options error: option 'user' cannot be used in this context ([PUSH-OPTIONS])
Sun Oct 18 22:07:11 2015 us=582850 Options error: option 'user' cannot be used in this context ([PUSH-OPTIONS])

You cannot push user/group option, it must be set in the config only.

BlackTornado wroteSun Oct 18 22:07:31 2015 us=983581 write to TUN/TAP : The data area passed to a system call is too small. (code=122)

This maybe due to version inconsistency above.

BlackTornado

Server logs:

root@OpenWrt:~# cat /tmp/openvpn.log
Fri Oct 23 09:25:26 2015 OpenVPN 2.3.6 mips-openwrt-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [MH] [IPv6] built on Jul 25 2015
Fri Oct 23 09:25:26 2015 library versions: OpenSSL 1.0.2d 9 Jul 2015, LZO 2.08
Fri Oct 23 09:25:27 2015 Diffie-Hellman initialized with 1024 bit key
Fri Oct 23 09:25:27 2015 Socket Buffers: R=[163840->131072] S=[163840->131072]
Fri Oct 23 09:25:27 2015 TUN/TAP device tun0 opened
Fri Oct 23 09:25:27 2015 TUN/TAP TX queue length set to 100
Fri Oct 23 09:25:27 2015 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Fri Oct 23 09:25:27 2015 /sbin/ifconfig tun0 10.8.0.1 netmask 255.255.255.0 mtu 1500 broadcast 10.8.0.255
Fri Oct 23 09:25:27 2015 GID set to nogroup
Fri Oct 23 09:25:27 2015 UID set to nobody
Fri Oct 23 09:25:27 2015 UDPv4 link local (bound): [undef]
Fri Oct 23 09:25:27 2015 UDPv4 link remote: [undef]
Fri Oct 23 09:25:27 2015 MULTI: multi_init called, r=256 v=256
Fri Oct 23 09:25:27 2015 IFCONFIG POOL: base=10.8.0.2 size=252, ipv6=0
Fri Oct 23 09:25:27 2015 Initialization Sequence Completed

OpenVPN 2.3.6 mips-openwrt-linux-gnu... Shouldn't be any large difference between 2.3.6 on my server and 2.3.8 on my client...

usonianhorizon

I too am facing the same problem, but the weird thing is that after 5 minutes, I get partial success. The server is on OpenWrt 15.05. Client is on Windows 10. Any further pointers for debugging would be greatly appreciated.

Here is my log output:

Thu Nov 12 15:26:47 2015 OpenVPN 2.3.8 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Aug  4 2015
Thu Nov 12 15:26:48 2015 library versions: OpenSSL 1.0.1p 9 Jul 2015, LZO 2.08
Enter Management Password:
Thu Nov 12 15:26:48 2015 UDPv4 link local (bound): [undef]
Thu Nov 12 15:26:48 2015 UDPv4 link remote: [AF_INET]192.168.11.138:1194
Thu Nov 12 15:26:50 2015 [g450h] Peer Connection Initiated with [AF_INET]192.168.11.138:1194
Thu Nov 12 15:26:52 2015 Options error: option 'user' cannot be used in this context ([PUSH-OPTIONS])
Thu Nov 12 15:26:52 2015 Options error: option 'user' cannot be used in this context ([PUSH-OPTIONS])
Thu Nov 12 15:26:52 2015 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Thu Nov 12 15:26:52 2015 open_tun, tt->ipv6=0
Thu Nov 12 15:26:52 2015 TAP-WIN32 device [Ethernet] opened: \\.\Global\{72DD0729-D0E8-4339-A562-2411B87D88DB}.tap
Thu Nov 12 15:26:52 2015 Set TAP-Windows TUN subnet mode network/local/netmask = 10.8.0.0/10.8.0.2/255.255.255.0 [SUCCEEDED]
Thu Nov 12 15:26:52 2015 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.8.0.2/255.255.255.0 on interface {72DD0729-D0E8-4339-A562-2411B87D88DB} [DHCP-serv: 10.8.0.254, lease-time: 31536000]
Thu Nov 12 15:26:52 2015 Successful ARP Flush on interface [23] {72DD0729-D0E8-4339-A562-2411B87D88DB}
Thu Nov 12 15:26:57 2015 Initialization Sequence Completed
Thu Nov 12 15:27:12 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:27:22 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:27:32 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:27:42 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:27:52 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:28:02 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:28:12 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:28:22 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:28:32 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:28:42 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:28:52 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:29:02 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:29:12 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:29:22 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:29:32 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:29:43 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:29:53 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:30:04 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:30:14 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:30:25 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:30:35 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:30:45 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:32:45 2015 [g450h] Inactivity timeout (--ping-restart), restarting
Thu Nov 12 15:32:45 2015 SIGUSR1[soft,ping-restart] received, process restarting
Thu Nov 12 15:32:47 2015 UDPv4 link local (bound): [undef]
Thu Nov 12 15:32:47 2015 UDPv4 link remote: [AF_INET]192.168.11.138:1194
Thu Nov 12 15:32:49 2015 [g450h] Peer Connection Initiated with [AF_INET]192.168.11.138:1194
Thu Nov 12 15:32:50 2015 write to TUN/TAP : The data area passed to a system call is too small.   (code=122)
Thu Nov 12 15:32:51 2015 Options error: option 'user' cannot be used in this context ([PUSH-OPTIONS])
Thu Nov 12 15:32:51 2015 Options error: option 'user' cannot be used in this context ([PUSH-OPTIONS])
Thu Nov 12 15:32:51 2015 Preserving previous TUN/TAP instance: Ethernet
Thu Nov 12 15:32:51 2015 Initialization Sequence Completed

Traffic

W10 client version:

usonianhorizon wroteThu Nov 12 15:26:47 2015 OpenVPN 2.3.8 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Aug 4 2015
Thu Nov 12 15:26:48 2015 library versions: OpenSSL 1.0.1p 9 Jul 2015, LZO 2.08

What version does your router use ?

[deleted]

I stumbled upon this when searching.
In my case the server was set to use comp-lzo and the client was not.
When resolving this all was fine (I selected to use comp-lzo in both ends)