Random PUSH_REQUEST problem at connection

battila

Hi guys,

I'd like to ask for some help. I have some connectivity issues to the OpenVPN server of my organization. The problem is when clients trying to connect to the VPN server sometimes it doesn't respond for the connectivity request. The error is very random because sometimes the connection goes very well but sometimes it isn't. It all started about 2-3 weeks ago. Nothing changed in the server config, actually I tried to backup it from an earlier state but the problem didn't go away. We didn't do any changes in the network inside the organization. Any idea?

What I see on the client side:

2021-04-28 21:07:06 MANAGEMENT: >STATE:1619636826,GET_CONFIG,,,,,,
2021-04-28 21:07:06 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:12 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:17 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:22 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:27 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:33 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:38 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:43 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:48 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:53 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:07:59 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:08:04 SENT CONTROL [xxxx.yyy.hu]: 'PUSH_REQUEST' (status=1)
2021-04-28 21:08:09 No reply from server after sending 12 push requests
2021-04-28 21:08:09 SIGUSR1[soft,no-push-reply] received, process restarting
2021-04-28 21:08:09 MANAGEMENT: >STATE:1619636889,RECONNECTING,no-push-reply,,,,,
2021-04-28 21:08:09 Restart pause, 5 second(s)

I know it's not the exact same time but this is what happening on the server side: (I checked this many times)

Wed Apr 28 21:30:13 2021 178.164.196.52:49580 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Wed Apr 28 21:30:13 2021 178.164.196.52:49580 TLS Error: TLS handshake failed
Wed Apr 28 21:30:13 2021 178.164.196.52:49580 SIGUSR1[soft,tls-error] received, client-instance restarting

dsekely_brs

What version of OS and open vpn server? I’m having similar issue and I am using Ubuntu 20.04 and open vpn 2.10.1 but haven’t found anything either.

Support had me turn off unattended updates but it has happened again since doing so.

daniel.ledford

dsekely_brs wrote What version of OS and open vpn server? I’m having similar issue and I am using Ubuntu 20.04 and open vpn 2.10.1 but haven’t found anything either.

Support had me turn off unattended updates but it has happened again since doing so.

What MFA are you using? I'm seeing similar issues at the MSP I work at including the turning off unattended upgrades doing nothing but its only for our customers using DUO for MFA, the customers using Microsoft MFA through Azure don't seem to have any issues.

Just trying to narrow down as much as possible while I wait for support.

openvpn_inc

Hello,

Please note that "2.10.1" is not Community openvpn; it is OpenVPN Access Server, the commercial product. Your similar issue is therefore probably not very similar. But in both cases it seems that the VPN tunnel failed to establish.

regards, rob0