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Random disconnections via ZNC #724

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opened 2026-10-05 04:41:02 +02:00 by adam · 4 comments
adam commented 2026-10-05 04:41:02 +02:00
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Have ZNC on an EC2 instance as my bouncer to my work IRC servers.

It has been disconnecting quite often, I would say more during "silent" chat moments.

I have tried chaning the ec2 instance in us-east-1 to one closer at eu-west-1, issues remain.
Also if I try without ZNC, direct connections don't seem to brake.

Some other colleages with a very similar setup and same EC2 instance tpy don't have the same issue.

How can I further debug this?

Sample disconnection:

  • Disconnected ()

    NickServ< identify ****
    chanserv< invite #channel

  • josvaz sets mode +r on josvaz
  • Notify: user1 is online (myconn-ZNC)
    ...
  • Notify: userN is online (myconn-ZNC)
  • Now talking on #channel

Have ZNC on an EC2 instance as my bouncer to my work IRC servers. It has been disconnecting quite often, I would say more during "silent" chat moments. I have tried chaning the ec2 instance in us-east-1 to one closer at eu-west-1, issues remain. Also if I try without ZNC, direct connections don't seem to brake. Some other colleages with a very similar setup and same EC2 instance tpy don't have the same issue. How can I further debug this? Sample disconnection: - Disconnected () >NickServ< identify **** >chanserv< invite #channel - josvaz sets mode +r on josvaz - Notify: user1 is online (myconn-ZNC) ... - Notify: userN is online (myconn-ZNC) - Now talking on #channel ## <!-- github-sync-id:177836111 -->
adam closed this issue 2026-10-05 04:41:02 +02:00
adam commented 2026-10-05 04:41:03 +02:00
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ZNC version?
Output of znc -D? (replace passwords and other secret info with xxxxx)

2016-09-19 17:46 GMT+01:00 josvazg notifications@github.com:

Have ZNC on an EC2 instance as my bouncer to my work IRC servers.

It has been disconnecting quite often, I would say more during "silent"
chat moments.

I have tried chaning the ec2 instance in us-east-1 to one closer at
eu-west-1, issues remain.
Also if I try without ZNC, direct connections don't seem to brake.

Some other colleages with a very similar setup and same EC2 instance tpy
don't have the same issue.

How can I further debug this?

Sample disconnection:

  • Disconnected () >NickServ< identify **** >chanserv< invite #channel
  • josvaz sets mode +r on josvaz
  • Notify: user1 is online (myconn-ZNC) ...
  • Notify: userN is online (myconn-ZNC)
  • Now talking on #channel

—
You are receiving this because you are subscribed to this thread.
Reply to this email directly, view it on GitHub
https://github.com/znc/znc/issues/1317, or mute the thread
https://github.com/notifications/unsubscribe-auth/AAT15CkGq9HjB7nT5aS2S2c81c995K-Oks5qrrxbgaJpZM4KAtHE
.

ZNC version? Output of znc -D? (replace passwords and other secret info with xxxxx) 2016-09-19 17:46 GMT+01:00 josvazg notifications@github.com: > Have ZNC on an EC2 instance as my bouncer to my work IRC servers. > > It has been disconnecting quite often, I would say more during "silent" > chat moments. > > I have tried chaning the ec2 instance in us-east-1 to one closer at > eu-west-1, issues remain. > Also if I try without ZNC, direct connections don't seem to brake. > > Some other colleages with a very similar setup and same EC2 instance tpy > don't have the same issue. > > How can I further debug this? > > Sample disconnection: > - Disconnected () >NickServ< identify ***\* >chanserv< invite #channel > - josvaz sets mode +r on josvaz > - Notify: user1 is online (myconn-ZNC) ... > - Notify: userN is online (myconn-ZNC) > - Now talking on #channel > > — > You are receiving this because you are subscribed to this thread. > Reply to this email directly, view it on GitHub > https://github.com/znc/znc/issues/1317, or mute the thread > https://github.com/notifications/unsubscribe-auth/AAT15CkGq9HjB7nT5aS2S2c81c995K-Oks5qrrxbgaJpZM4KAtHE > . <!-- github-comment-id:248058239 -->
adam commented 2026-10-05 04:41:04 +02:00
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Version is:

version
<_status> ZNC 1.6.3+deb1 - http://znc.in
<_status> IPv6: yes, SSL: yes, DNS: threads, charset: yes

Will run today with znc -D and attack logs later here

Version is: version <_status> ZNC 1.6.3+deb1 - http://znc.in <_status> IPv6: yes, SSL: yes, DNS: threads, charset: yes Will run today with znc -D and attack logs later here <!-- github-comment-id:248227617 -->
adam commented 2026-10-05 04:41:05 +02:00
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Aha!

znc -D has been quite useful for me to debug this issue:

  1. I have NOT detected disconnections in the ZNC-IRC segment.
  2. Disconnections on my side (USER-ZNC) seem to be related to me setting the VPN on or off, as I had all traffic routed via that VPN. My IP changed and my client had to reconnect to ZNC.

I believe I even had issues while still under the VPN cause it might reconfigure and change my IP from time to time, or reconnect everytime I wake up the laptop again.

Aha! znc -D has been quite useful for me to debug this issue: 1) I have NOT detected disconnections in the ZNC-IRC segment. 2) Disconnections on my side (USER-ZNC) seem to be related to me setting the VPN on or off, as I had all traffic routed via that VPN. My IP changed and my client had to reconnect to ZNC. I believe I even had issues while still under the VPN cause it might reconfigure and change my IP from time to time, or reconnect everytime I wake up the laptop again. <!-- github-comment-id:248549189 -->
adam commented 2026-10-05 04:41:05 +02:00
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Documenting for other having similar issues:

  1. Use znc -D on your znc host to debug if the disconnection is between you and ZNC or ZNC-IRC. (Using a screen session or similar is recommended to detach znc -D from ssh connections)

  2. The logs from znc -D are usually quite clear on whether the user's client disconnected from ZNC or ZNC from IRC.

If the disconnection is from your client to ZNC, watch out for something chaning your public IP, like using a VPN and routing all traffic through it. VPN setup and tear down will break your connections with ZNC.

Documenting for other having similar issues: 1) Use znc -D on your znc host to debug if the disconnection is between you and ZNC or ZNC-IRC. (Using a screen session or similar is recommended to detach znc -D from ssh connections) 2) The logs from znc -D are usually quite clear on whether the user's client disconnected from ZNC or ZNC from IRC. If the disconnection is from your client to ZNC, watch out for something chaning your public IP, like using a VPN and routing all traffic through it. VPN setup and tear down will break your connections with ZNC. <!-- github-comment-id:248552225 -->
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Reference: adam/znc#724