TCP/UDP: Socket bind failed on local address [AF_INET][undef]:1194

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cit2794
OpenVpn Newbie
Posts: 1
Joined: Tue Dec 11, 2018 11:19 pm

TCP/UDP: Socket bind failed on local address [AF_INET][undef]:1194

Post by cit2794 » Tue Dec 11, 2018 11:40 pm

HI, i'm a girl from mexico trying to make a VPN with OpenVPN on windows server 2008. I barely have idea of how to do this, but i've been trying to follow this: https://community.openvpn.net/openvpn/w ... dows_Guide

I use a no-ip dynamic domain to connect my VPN, but i don't thing this is the problem because i havent even connect a client to the server due to i have problems with my server.

this is my server config file:
server

#################################################
# Sample OpenVPN 2.0 config file for #
# multi-client server. #
# #
# This file is for the server side #
# of a many-clients <-> one-server #
# OpenVPN configuration. #
# #
# OpenVPN also supports #
# single-machine <-> single-machine #
# configurations (See the Examples page #
# on the web site for more info). #
# #
# This config should work on Windows #
# or Linux/BSD systems. Remember on #
# Windows to quote pathnames and use #
# double backslashes, e.g.: #
# "C:\\Program Files\\OpenVPN\\config\\foo.key" #
# #
# Comments are preceded with '#' or ';' #
#################################################

# Which local IP address should OpenVPN
# listen on? (optional)
;local a.b.c.d

# Which TCP/UDP port should OpenVPN listen on?
# If you want to run multiple OpenVPN instances
# on the same machine, use a different port
# number for each one. You will need to
# open up this port on your firewall.
port 1194

# TCP or UDP server?
;proto tcp
proto udp4

# "dev tun" will create a routed IP tunnel,
# "dev tap" will create an ethernet tunnel.
# Use "dev tap0" if you are ethernet bridging
# and have precreated a tap0 virtual interface
# and bridged it with your ethernet interface.
# If you want to control access policies
# over the VPN, you must create firewall
# rules for the the TUN/TAP interface.
# On non-Windows systems, you can give
# an explicit unit number, such as tun0.
# On Windows, use "dev-node" for this.
# On most systems, the VPN will not function
# unless you partially or fully disable
# the firewall for the TUN/TAP interface.
dev tap
;dev tun

# Windows needs the TAP-Win32 adapter name
# from the Network Connections panel if you
# have more than one. On XP SP2 or higher,
# you may need to selectively disable the
# Windows firewall for the TAP adapter.
# Non-Windows systems usually don't need this.
dev-node TapOpenVPN

# SSL/TLS root certificate (ca), certificate
# (cert), and private key (key). Each client
# and the server must have their own cert and
# key file. The server and all clients will
# use the same ca file.
#
# See the "easy-rsa" directory for a series
# of scripts for generating RSA certificates
# and private keys. Remember to use
# a unique Common Name for the server
# and each of the client certificates.
#
# Any X509 key management system can be used.
# OpenVPN can also use a PKCS #12 formatted key file
# (see "pkcs12" directive in man page).
ca "C:\\Program Files\\OpenVPN\\config\\ca.crt"
cert "C:\\Program Files\\OpenVPN\\config\\server.crt"
key "C:\\Program Files\\OpenVPN\\config\\server.key" # This file should be kept secret

# Diffie hellman parameters.
# Generate your own with:
# openssl dhparam -out dh2048.pem 2048
dh "C:\\Program Files\\OpenVPN\\config\\dh2048.pem"

# Network topology
# Should be subnet (addressing via IP)
# unless Windows clients v2.0.9 and lower have to
# be supported (then net30, i.e. a /30 per client)
# Defaults to net30 (not recommended)
;topology subnet

# Configure server mode and supply a VPN subnet
# for OpenVPN to draw client addresses from.
# The server will take 10.8.0.1 for itself,
# the rest will be made available to clients.
# Each client will be able to reach the server
# on 10.8.0.1. Comment this line out if you are
# ethernet bridging. See the man page for more info.
server 10.8.0.0 255.255.255.0

# Maintain a record of client <-> virtual IP address
# associations in this file. If OpenVPN goes down or
# is restarted, reconnecting clients can be assigned
# the same virtual IP address from the pool that was
# previously assigned.
ifconfig-pool-persist ipp.txt

# Configure server mode for ethernet bridging.
# You must first use your OS's bridging capability
# to bridge the TAP interface with the ethernet
# NIC interface. Then you must manually set the
# IP/netmask on the bridge interface, here we
# assume 10.8.0.4/255.255.255.0. Finally we
# must set aside an IP range in this subnet
# (start=10.8.0.50 end=10.8.0.100) to allocate
# to connecting clients. Leave this line commented
# out unless you are ethernet bridging.
;server-bridge 10.8.0.4 255.255.255.0 10.8.0.50 10.8.0.100

# Configure server mode for ethernet bridging
# using a DHCP-proxy, where clients talk
# to the OpenVPN server-side DHCP server
# to receive their IP address allocation
# and DNS server addresses. You must first use
# your OS's bridging capability to bridge the TAP
# interface with the ethernet NIC interface.
# Note: this mode only works on clients (such as
# Windows), where the client-side TAP adapter is
# bound to a DHCP client.
;server-bridge

# Push routes to the client to allow it
# to reach other private subnets behind
# the server. Remember that these
# private subnets will also need
# to know to route the OpenVPN client
# address pool (10.8.0.0/255.255.255.0)
# back to the OpenVPN server.
;push "route 192.168.10.0 255.255.255.0"
;push "route 192.168.20.0 255.255.255.0"

# To assign specific IP addresses to specific
# clients or if a connecting client has a private
# subnet behind it that should also have VPN access,
# use the subdirectory "ccd" for client-specific
# configuration files (see man page for more info).

# EXAMPLE: Suppose the client
# having the certificate common name "Thelonious"
# also has a small subnet behind his connecting
# machine, such as 192.168.40.128/255.255.255.248.
# First, uncomment out these lines:
;client-config-dir ccd
;route 192.168.40.128 255.255.255.248
# Then create a file ccd/Thelonious with this line:
# iroute 192.168.40.128 255.255.255.248
# This will allow Thelonious' private subnet to
# access the VPN. This example will only work
# if you are routing, not bridging, i.e. you are
# using "dev tun" and "server" directives.

# EXAMPLE: Suppose you want to give
# Thelonious a fixed VPN IP address of 10.9.0.1.
# First uncomment out these lines:
;client-config-dir ccd
;route 10.9.0.0 255.255.255.252
# Then add this line to ccd/Thelonious:
# ifconfig-push 10.9.0.1 10.9.0.2

# Suppose that you want to enable different
# firewall access policies for different groups
# of clients. There are two methods:
# (1) Run multiple OpenVPN daemons, one for each
# group, and firewall the TUN/TAP interface
# for each group/daemon appropriately.
# (2) (Advanced) Create a script to dynamically
# modify the firewall in response to access
# from different clients. See man
# page for more info on learn-address script.
;learn-address ./script

# If enabled, this directive will configure
# all clients to redirect their default
# network gateway through the VPN, causing
# all IP traffic such as web browsing and
# and DNS lookups to go through the VPN
# (The OpenVPN server machine may need to NAT
# or bridge the TUN/TAP interface to the internet
# in order for this to work properly).
;push "redirect-gateway def1 bypass-dhcp"

# Certain Windows-specific network settings
# can be pushed to clients, such as DNS
# or WINS server addresses. CAVEAT:
# http://openvpn.net/faq.html#dhcpcaveats
# The addresses below refer to the public
# DNS servers provided by opendns.com.
;push "dhcp-option DNS 208.67.222.222"
;push "dhcp-option DNS 208.67.220.220"

# Uncomment this directive to allow different
# clients to be able to "see" each other.
# By default, clients will only see the server.
# To force clients to only see the server, you
# will also need to appropriately firewall the
# server's TUN/TAP interface.
;client-to-client

# Uncomment this directive if multiple clients
# might connect with the same certificate/key
# files or common names. This is recommended
# only for testing purposes. For production use,
# each client should have its own certificate/key
# pair.
#
# IF YOU HAVE NOT GENERATED INDIVIDUAL
# CERTIFICATE/KEY PAIRS FOR EACH CLIENT,
# EACH HAVING ITS OWN UNIQUE "COMMON NAME",
# UNCOMMENT THIS LINE OUT.
;duplicate-cn

# The keepalive directive causes ping-like
# messages to be sent back and forth over
# the link so that each side knows when
# the other side has gone down.
# Ping every 10 seconds, assume that remote
# peer is down if no ping received during
# a 120 second time period.
keepalive 10 120

# For extra security beyond that provided
# by SSL/TLS, create an "HMAC firewall"
# to help block DoS attacks and UDP port flooding.
#
# Generate with:
# openvpn --genkey --secret ta.key
#
# The server and each client must have
# a copy of this key.
# The second parameter should be '0'
# on the server and '1' on the clients.
#tls-auth ta.key 0 # This file is secret

# Select a cryptographic cipher.
# This config item must be copied to
# the client config file as well.
# Note that v2.4 client/server will automatically
# negotiate AES-256-GCM in TLS mode.
# See also the ncp-cipher option in the manpage
cipher AES-256-CBC

# Enable compression on the VPN link and push the
# option to the client (v2.4+ only, for earlier
# versions see below)
;compress lz4-v2
;push "compress lz4-v2"

# For compression compatible with older clients use comp-lzo
# If you enable it here, you must also
# enable it in the client config file.
;comp-lzo

# The maximum number of concurrently connected
# clients we want to allow.
;max-clients 100

# It's a good idea to reduce the OpenVPN
# daemon's privileges after initialization.
#
# You can uncomment this out on
# non-Windows systems.
;user nobody
;group nobody

# The persist options will try to avoid
# accessing certain resources on restart
# that may no longer be accessible because
# of the privilege downgrade.
persist-key
persist-tun

# Output a short status file showing
# current connections, truncated
# and rewritten every minute.
status openvpn-status.log

# By default, log messages will go to the syslog (or
# on Windows, if running as a service, they will go to
# the "\Program Files\OpenVPN\log" directory).
# Use log or log-append to override this default.
# "log" will truncate the log file on OpenVPN startup,
# while "log-append" will append to it. Use one
# or the other (but not both).
;log openvpn.log
;log-append openvpn.log

# Set the appropriate level of log
# file verbosity.
#
# 0 is silent, except for fatal errors
# 4 is reasonable for general usage
# 5 and 6 can help to debug connection problems
# 9 is extremely verbose
verb 3

# Silence repeating messages. At most 20
# sequential messages of the same message
# category will be output to the log.
;mute 20

# Notify the client that when the server restarts so it
# can automatically reconnect.
explicit-exit-notify 1



And this is what i get on the view log:

Code: Select all

Tue Dec 11 17:16:04 2018 OpenVPN 2.4.6 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Apr 26 2018
Tue Dec 11 17:16:04 2018 Windows version 6.1 (Windows 7) 64bit
Tue Dec 11 17:16:04 2018 library versions: OpenSSL 1.1.0h  27 Mar 2018, LZO 2.10
Enter Management Password:
Tue Dec 11 17:16:05 2018 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25340
Tue Dec 11 17:16:05 2018 Need hold release from management interface, waiting...
Tue Dec 11 17:16:05 2018 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:25340
Tue Dec 11 17:16:05 2018 MANAGEMENT: CMD 'state on'
Tue Dec 11 17:16:05 2018 MANAGEMENT: CMD 'log all on'
Tue Dec 11 17:16:05 2018 MANAGEMENT: CMD 'echo all on'
Tue Dec 11 17:16:05 2018 MANAGEMENT: CMD 'bytecount 5'
Tue Dec 11 17:16:05 2018 MANAGEMENT: CMD 'hold off'
Tue Dec 11 17:16:05 2018 MANAGEMENT: CMD 'hold release'
Tue Dec 11 17:16:05 2018 NOTE: your local LAN uses the extremely common subnet address 192.168.0.x or 192.168.1.x.  Be aware that this might create routing conflicts if you connect to the VPN server from public locations such as internet cafes that use the same subnet.
Tue Dec 11 17:16:05 2018 Diffie-Hellman initialized with 2048 bit key
Tue Dec 11 17:16:05 2018 interactive service msg_channel=0
Tue Dec 11 17:16:05 2018 open_tun
Tue Dec 11 17:16:05 2018 TAP-WIN32 device [TapOpenVPN] opened: \\.\Global\{A6297B4E-222C-4B95-90EF-49AE3406366C}.tap
Tue Dec 11 17:16:05 2018 TAP-Windows Driver Version 9.21 
Tue Dec 11 17:16:05 2018 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.8.0.1/255.255.255.0 on interface {A6297B4E-222C-4B95-90EF-49AE3406366C} [DHCP-serv: 10.8.0.0, lease-time: 31536000]
Tue Dec 11 17:16:05 2018 Sleeping for 10 seconds...
Tue Dec 11 17:16:15 2018 Successful ARP Flush on interface [27] {A6297B4E-222C-4B95-90EF-49AE3406366C}
Tue Dec 11 17:16:15 2018 do_ifconfig, tt->did_ifconfig_ipv6_setup=0
Tue Dec 11 17:16:15 2018 MANAGEMENT: >STATE:1544570175,ASSIGN_IP,,10.8.0.1,,,,
Tue Dec 11 17:16:15 2018 Socket Buffers: R=[8192->8192] S=[8192->8192]
Tue Dec 11 17:16:15 2018 MANAGEMENT: Client disconnected
Tue Dec 11 17:16:15 2018 TCP/UDP: Socket bind failed on local address [AF_INET][undef]:1194
Tue Dec 11 17:16:15 2018 Exiting due to fatal error
Tue Dec 11 17:16:15 2018 Closing TUN/TAP interface
Tue Dec 11 17:16:15 2018 NOTE: Release of DHCP-assigned IP address lease on TAP-Windows adapter failed: Todavía no se ha asociado una dirección con el extremo de red.   (code=1228)


I hope someone can help me.. I don't understand why I got TCP/UDP: Socket bind failed on local address [AF_INET][undef]:1194
I saw that in this part i should have an IP adress, where do I define this and what IP do i have to wrte on it?

thanks already and sorry for my english.

TinCanTech
OpenVPN Protagonist
Posts: 11137
Joined: Fri Jun 03, 2016 1:17 pm

Re: TCP/UDP: Socket bind failed on local address [AF_INET][undef]:1194

Post by TinCanTech » Wed Dec 12, 2018 12:10 pm

Try setting verb 4 in your config file.

gentleuser
OpenVpn Newbie
Posts: 1
Joined: Tue Jan 19, 2021 10:03 am

Re: TCP/UDP: Socket bind failed on local address [AF_INET][undef]:1194

Post by gentleuser » Tue Jan 19, 2021 10:07 am

Hello.
I have a very similar problem.

My log is:

Code: Select all

2021-01-19 11:00:34 WARNING: Compression for receiving enabled. Compression has been used in the past to break encryption. Sent packets are not compressed unless "allow-compression yes" is also set.
2021-01-19 11:00:34 DEPRECATED OPTION: --cipher set to 'AES-256-CBC' but missing in --data-ciphers (AES-256-GCM:AES-128-GCM). Future OpenVPN version will ignore --cipher for cipher negotiations. Add 'AES-256-CBC' to --data-ciphers or change --cipher 'AES-256-CBC' to --data-ciphers-fallback 'AES-256-CBC' to silence this warning.
2021-01-19 11:00:34 OpenVPN 2.5.0 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Oct 28 2020
2021-01-19 11:00:34 Windows version 6.1 (Windows 7) 64bit
2021-01-19 11:00:34 library versions: OpenSSL 1.1.1h  22 Sep 2020, LZO 2.10
Enter Management Password:
2021-01-19 11:00:36 TCP/UDP: Preserving recently used remote address: [AF_INET]xx.xxx.xx.xx:1194
2021-01-19 11:00:36 TCP/UDP: Socket bind failed on local address [AF_INET6][undef]:1194
2021-01-19 11:00:36 Exiting due to fatal error
My config is:

Code: Select all

client
remote XX.XXX.XX.XX
dev tun
proto udp
persist-tun
persist-key 
resolv-retry infinite
auth-user-pass
comp-lzo adaptive 
mute-replay-warnings
cipher AES-256-CBC
remote-cert-tls server
auth SHA1

<ca>
-----BEGIN CERTIFICATE-----
HIDDEN
-----END CERTIFICATE-----
</ca>
<cert>
-----BEGIN CERTIFICATE-----
HIDDEN
-----END CERTIFICATE-----
</cert>
<key>
-----BEGIN PRIVATE KEY-----
HIDDEN
-----END PRIVATE KEY-----
</key>
The fact is login and password works great.
I a using Windows7 64bit.
I have also installed NordVPN (if that matters) but I am not using it in the same time (but drivers are installed - does it matter? may this interfere?).

On the other system account - same OS - connection works (same settings, but file named differently), and I am not using NordVPN there as well.

What could be the issue ?
I just cannot connect. It rejects me just after clicking "connect" in the login/pass popup.

Moreover, I've just checked and my log folde rwas set to the folder of another user (how to set this simultaneously ?) so I changed it to the current user and I have this log errors now:

Code: Select all

2021-01-19 11:12:32 MANAGEMENT: Socket bind failed on local address [AF_INET]127.0.0.1:25340
2021-01-19 11:12:32 Exiting due to fatal error

EDIT - new info
====================
Alright. I've just found out what a problem was:
I was trying to connect through vpn using one OS user, while the second user was still connected - my bad, sorry!

I have one more question: Using a non-admin account I was trygin to connect using OpenVPN and everyting is fine.
But.. If I try to connect to any of shares in this VPN connection (login/pass are properly entered), it shows me that It does not exist or I have on such permissions.

Image

TinCanTech
OpenVPN Protagonist
Posts: 11137
Joined: Fri Jun 03, 2016 1:17 pm

Re: TCP/UDP: Socket bind failed on local address [AF_INET][undef]:1194

Post by TinCanTech » Tue Jan 19, 2021 3:56 pm

Actually, you need to use --nobind in your client config.

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