All AirVPNs stopped working today

[ZackR 0]

What changed today in the server configs guys? Did you stop supporting an older version of OpenVPN? I can no longer connect to any Airvpn servers that I have used for the last 5 years.
Nothing has changed here on my side.  VPN services from another company continue to work fine.

I tested about 70 servers, none of them connecting. I'm using a VPN router to connect. It uses a older version of Openvpn. Also when I posted this message to this forum there's a message saying
"You have reached the maximum number of posts you can make per day." so apparently I will not even be allowed to respond to messages I receive in response to this question?

If you change the server configurations in a way that requires some customers to change their configuration files, there should be a public announcement.

If I try to connect to the servers I've used and worked fine for the last 5+ years, I get:
Tue Dec 16 18:13:09 2025 Incoming Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
Tue Dec 16 18:13:09 2025 Socket Buffers: R=[163840->131072] S=[163840->131072]
Tue Dec 16 18:13:09 2025 UDPv4 link local: [undef]
Tue Dec 16 18:13:09 2025 UDPv4 link remote: [AF_INET]82.102.28.106:443
Tue Dec 16 18:13:09 2025 TLS: Initial packet from [AF_INET]82.102.28.106:443, sid=1ebcb146 f84d2a9d

I tried downloading the latest ovpn files (selecting older openvpn version 2.4) on the download config page. Now I get:
Tue Dec 16 18:11:57 2025 UDPv4 link local: [undef]
Tue Dec 16 18:11:57 2025 UDPv4 link remote: [AF_INET]82.102.28.106:443
Tue Dec 16 18:11:57 2025 TLS: Initial packet from [AF_INET]82.102.28.106:443, sid=ec579012 b73d0312
Tue Dec 16 18:12:00 2025 event_wait : Interrupted system call (code=4)
Tue Dec 16 18:12:00 2025 SIGTERM[hard,] received, process exiting

Help please!

Edited ... by ZackR

[Staff 10394]

8 hours ago, ZackR said:

Did you stop supporting an older version of OpenVPN? I can no longer connect to any Airvpn servers that I have used for the last 5 years.

Hello!

OpenVPN 2.4 is still supported. However, please note that the new OpenVPN pushes IPv6 no matter what and we are not planning to fork / patch for this reason atm. Therefore, please make sure that:

1. you run OpenVPN 2.4 or newer version (OpenVPN 2.5 or even better 2.6 are recommended)
2. just in case you have no IPv6 support on your system or tun interface please enable it
3. if you can't enable IPv6 please make sure to filter out IPv6 related pushes by following this message: https://airvpn.org/forums/topic/26548-linux-ip-6-addr-add-failed/?do=findComment&comment=72069

Kind regards

 

[ZackR 0]

You didn't answer my main question. You changed the server configurations yesterday, right?
And made no announcement about it. You're completely silent on that and I want an answer please.

Edited ... by ZackR

[Staff 10394]

3 minutes ago, ZackR said:

You didn't answer my main question. You changed the server configurations yesterday, right?
And made no announcement about it. You're completely silent on that and I want an answer please.

No.

 

[ZackR 0]

We are a company using AirVPN.
We have multiple VPN routers, they all stopped working on the same day.
Nobody logged into our local Linux routers and changed our config files, that means 100% for sure your server configs were changed.
Clearly there is just a disconnect between you (customer support) and the engineers who are handling these changes at AirVPN, and that is not good.
These changes should be announced.
These changes are highly disruptive and pretty much wreaked our workday.
And why are all these posts "moderated" so that nobody can see them, and manually approved one-by-one.

Edited ... by ZackR

[ZackR 0]

Which should we try first.
Updating OpenVPN on our routers, or appending (putting this at the end of the OVPN files) ?
Neither of these changes are trivial.

pull-filter ignore "dhcp-option DNS6"
pull-filter ignore "tun-ipv6"
pull-filter ignore "ifconfig-ipv6"

Edited ... by ZackR

[Staff 10394]

9 hours ago, ZackR said:

We have multiple VPN routers, they all stopped working on the same day.
Nobody logged into our local Linux routers and changed our config files, that means 100% for sure your server configs were changed.
Clearly there is just a disconnect between you (customer support) and the engineers who are handling these changes at AirVPN, and that is not good.
These changes should be announced.

No changes and this is not customer support. For customer support please open a ticket or write to support@airvpn.org.

Please note that OpenVPN 2.3 phasing out was announced in 2017, 8 years ago, and that gradual activation of IPv6 was announced in 2018, 7 years ago. In spite of this we still maintain, under specific conditions, backward compatibility with OpenVPN 2.3 (latest branch version, 2.3.12) on entry-IP address 1 only.

For a correct diagnosis please tell us which OpenVPN versions you're running and send us an OpenVPN log showing a connection failure.
Note that OpenVPN 2.4, released in 2016, is fully supported.

Please remember that not keeping software up to date in a company may configure various civil and criminal infringements in several countries, charges of negligence in the EU, as well as civil and administrative liabilities.

Kind regards
 

[Staff 10394]

37 minutes ago, ZackR said:

Which should we try first.
Updating OpenVPN on our routers, or appending (putting this at the end of the OVPN files) ?

Hello!

Before answering we need to see the OpenVPN log showing a connection failure and (if not reported in the log) the OpenVPN version you're running. In general, please consider that OpenVPN 2.4 and higher versions are supported (therefore you're fine with 2.4, 2.5, 2.6, 2.7 and 3). Or you can follow the steps described in our previous messages, which should cover all cases.

Kind regards
 

[ZackR 0]

34 minutes ago, Staff said:

Before answering we need to see the OpenVPN log showing a connection failure

I provided that information in my first message.

If I try to connect to the servers I've used and worked fine for the last 5+ years, I get:
Tue Dec 16 18:13:09 2025 Incoming Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
Tue Dec 16 18:13:09 2025 Socket Buffers: R=[163840->131072] S=[163840->131072]
Tue Dec 16 18:13:09 2025 UDPv4 link local: [undef]
Tue Dec 16 18:13:09 2025 UDPv4 link remote: [AF_INET]82.102.28.106:443
Tue Dec 16 18:13:09 2025 TLS: Initial packet from [AF_INET]82.102.28.106:443, sid=1ebcb146 f84d2a9d
AND THEN NO FURTHER MESSAGES, IT STOPS TRYING TO CONNECT

I tried downloading the latest ovpn files (selecting older openvpn version 2.4) on the download config page. With the new ovpn files (named entry3) I get:
Tue Dec 16 18:11:57 2025 UDPv4 link local: [undef]
Tue Dec 16 18:11:57 2025 UDPv4 link remote: [AF_INET]82.102.28.106:443
Tue Dec 16 18:11:57 2025 TLS: Initial packet from [AF_INET]82.102.28.106:443, sid=ec579012 b73d0312
Tue Dec 16 18:12:00 2025 event_wait : Interrupted system call (code=4)
Tue Dec 16 18:12:00 2025 SIGTERM[hard,] received, process exiting

Look at the last message. It shows a connection failure.

[Staff 10394]

4 hours ago, ZackR said:

I provided that information in my first message.

No, you didn't.

You provided an extract of 5 rows from the log that are useless, unfortunately. Please publish the complete log. Also, please remember what we wrote: if not reported in the log, please specify the OpenVPN version you're running.

Kind regards