Re: Troubleshooting tools and methods

Gert Doering <[email protected]> Sun, 25 Aug 2024 10:54:26 +0200

Newsgroups	gmane.network.openvpn.user
Message-ID	<[email protected]>

Hi,

On Sun, Aug 25, 2024 at 06:05:49AM +0000, Peter Davis via Openvpn-users wrote:
> When you want to connect to an OpenVPN server, but the client cannot connect to the server, what tools and methods do you use for troubleshooting?

common sense, client log (--verb 4), server log

There's a few typical problems

 - network connection issues (firewall, NAT rules, server process not
   running, server IP/port misconfigured in the client config) - this is
   usually quite clear by not getting any response to connection attempts,
   and not seeing anything in the server logs.  Sometimes "ping", "traceroute"
   etc. are helpful in figuring out where the packets are lost.

 - TLS/auth issues, in which case the client *can* talk to the server, but
   the server refuses to serve this client -> clear from the server logs
   (and in newer OpenVPN versions, usually also visible in the client logs)

gert

-- 
"If was one thing all people took for granted, was conviction that if you 
 feed honest figures into a computer, honest figures come out. Never doubted 
 it myself till I met a computer with a sense of humor."
                             Robert A. Heinlein, The Moon is a Harsh Mistress

Gert Doering - Munich, Germany                             [email protected]

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