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znc keeps using old system dns resolvers even after theyre changed? #690

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opened 2026-10-05 04:38:53 +02:00 by adam · 7 comments
adam commented 2026-10-05 04:38:53 +02:00
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is that how znc works? because i was having trouble all day with my dns messing up so znc was unable to connect to anything. and then when i finally fixed the system dns, znc continued to not work until i restarted it. so it seemed like znc continued to use the old dns servers instead of getting the new system ones. not sure if this always happens or if it was a special case

<_status> ZNC 1.6.3 - http://znc.in
<_status> IPv6: yes, SSL: yes, DNS: threads, charset: no

CentOS 6.7

is that how znc works? because i was having trouble all day with my dns messing up so znc was unable to connect to anything. and then when i finally fixed the system dns, znc continued to not work until i restarted it. so it seemed like znc continued to use the old dns servers instead of getting the new system ones. not sure if this always happens or if it was a special case <_status> ZNC 1.6.3 - http://znc.in <_status> IPv6: yes, SSL: yes, DNS: threads, charset: no CentOS 6.7 <!-- github-sync-id:142800368 -->
adam closed this issue 2026-10-05 04:38:53 +02:00
adam commented 2026-10-05 04:38:54 +02:00
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Try restarting znc

Try restarting znc <!-- github-comment-id:200062984 -->
adam commented 2026-10-05 04:38:55 +02:00
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It just uses getaddrinfo() to resolve DNS, as the majority of other software...

It just uses `getaddrinfo()` to resolve DNS, as the majority of other software... <!-- github-comment-id:200064218 -->
adam commented 2026-10-05 04:38:55 +02:00
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it didnt seem to pick up any of my dns changes until i restarted it. only then did it start resolving hosts again. idk

it didnt seem to pick up any of my dns changes until i restarted it. only then did it start resolving hosts again. idk <!-- github-comment-id:200075307 -->
adam commented 2026-10-05 04:38:56 +02:00
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well if it does what every other software does maybe something else caused it somehow. now i know i can restart it if it happens again. so you can close this if you think theres no problem with znc

well if it does what every other software does maybe something else caused it somehow. now i know i can restart it if it happens again. so you can close this if you think theres no problem with znc <!-- github-comment-id:200075577 -->
adam commented 2026-10-05 04:38:57 +02:00
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had this happen again on another server. i set up unbound to manage my dns requests and every application was able to start resolving hosts using the new resolvers but znc wouldnt. it needed to be restarted

had this happen again on another server. i set up `unbound` to manage my dns requests and every application was able to start resolving hosts using the new resolvers but znc wouldnt. it needed to be restarted <!-- github-comment-id:202456666 -->
adam commented 2026-10-05 04:38:57 +02:00
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I think /etc/resolv.conf had some option for telling everything to always read it which is said to be a bad idea and searx says that you should service network restart.

I think `/etc/resolv.conf` had some option for telling everything to always read it which is said to be a bad idea and [searx](https://searx.me/?q=centos%20reload%20/etc/resolv.conf&categories=general) says that you should [service network restart](https://www.centos.org/forums/viewtopic.php?t=41520). <!-- github-comment-id:202763378 -->
adam commented 2026-10-05 04:38:58 +02:00
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kk ill try that next time

kk ill try that next time <!-- github-comment-id:202812419 -->
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Reference: adam/znc#690