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Troubleshooting:Openvpn Troubleshooting

From jb-vpn.uk Wiki

This guide covers troubleshooting for OpenVPN server and client connection issues.

Server Not Starting

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Check logs:

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   journalctl -u openvpn -n 50

Verify configuration:

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   openvpn --config /etc/openvpn/server/server.conf --test-crypto

Check file permissions:

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   ls -la /etc/openvpn/server/
=== Certificates should be readable by OpenVPN user ===

Client Cannot Connect

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Check server is listening:

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   ss -ulnp | grep 1194

Check firewall:

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   iptables -L INPUT -n -v | grep 1194

Verify client certificate:

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  * Ensure certificate hasn't been revoked

  * Check certificate expiration date

  * Verify CA certificate matches server

Check server logs:

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   tail -f /var/log/syslog | grep openvpn

Connection Drops

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Check keepalive settings in server.conf

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Verify network connectivity:

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   ping 10.8.0.2

Check routing:

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   ip route | grep 10.8.0.0

Performance Issues

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Check server load:

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   top
   htop

Monitor network traffic:

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   iftop -i tun0

Check for connection limits in server configuration

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  • [OpenVPN Server](index.md) - Server configuration
  • [User Management](user-management.md) - User management
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