My OpenVPN server has been and is running perfectly for some years now (so I have forgotten a lot I learned setting it up!).
Essentially whilst all configured clients connect just fine, bringing new IOS clients online is problematical in that I can't import the configuration via iTunes as of old so now have to produce a new comprehensive .opvn file for each.
I can take a configuration (consisting of ca.crt, ta.key, client.key. client.crt and client.ovpn) and it works fine using Tunnelblick on my iMac, then build a new client.ovpn with the certificates embedded, but when I import it to my iPad it will fail. My iPhone connects with a profile created two years ago, but if I build a new profile as above using the same files after import that to fails with the Authentication error in the server log and a connection timeout on the client.
I have been stumped by this for a while now and read many posts (including the sticky at the top) but can'f find the reason this is failing. Any pointers would be gratefully received.
Server.conf - redacted
Server config
#local <ip address>
port <port>
proto udp
dev tun0
ca /etc/openvpn/certs/ca.crt
cert /etc/openvpn/certs/hollyhop.crt
key /etc/openvpn/certs/hollyhop.key # This file should be kept secret
dh /etc/openvpn/certs/dh2048.pem
tls-auth /etc/openvpn/certs/ta.key 0
server 10.131.134.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "route 10.131.132.0 255.255.254.0"
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 8.8.8.8"
push "dhcp-option DNS 8.8.4.4"
client-to-client
keepalive 10 120
cipher AES-256-CBC
max-clients 25
persist-key
persist-tun
status /var/log/openvpn-status.log
log-append /var/log/openvpn.log
verb 3
mute 20
explicit-exit-notify 1
Old client profile .ovpn
Old client config
client
dev tun
proto udp
remote <ip address> <port>
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert ipad.crt
key ipad.key
cipher AES-256-CBC
remote-cert-tls server
tls-auth ta.key 1
auth-nocache
verb 5
mute 20
New client profile .ovpn
New client profile
client
dev tun
proto udp
remote <ip address> <port>
resolv-retry infinite
nobind
persist-key
persist-tun
cipher AES-256-CBC
remote-cert-tls server
auth-nocache
verb 5
mute 20
<ca>
-----BEGIN CERTIFICATE-----
snip
-----END CERTIFICATE-----
</ca>
<cert>
-----BEGIN CERTIFICATE-----
snip
-----END CERTIFICATE-----
</cert>
<key>
-----BEGIN PRIVATE KEY-----
snip
-----END PRIVATE KEY-----
</key>
<tls-auth>
-----BEGIN OpenVPN Static key V1-----
snip
-----END OpenVPN Static key V1-----
</tls-auth>
openvpn server log extract
Code: Select all
Sat Oct 24 12:18:09 2020 Authenticate/Decrypt packet error: packet HMAC authentication failed
Sat Oct 24 12:18:09 2020 TLS Error: incoming packet authentication failed from [AF_INET]<ip address>:<port>