could not resolve any host after upgrade to ispconfig 3.1.13 on Debian 8.11

Hi,
after upgrade ISPConfig from 3.1.12 to 3.1.13 on my Debian 8.11 could not resolve any host.
Ping says: ping: unknown host google.com
No made any other changes, only upgrade ISPC using ispconfig_update.sh.
What I forgot?
Thank for any help and all best to new year
Vidro

 

My guess is name service is not working. What does ISPConfig Monitor tab show?
Or host lost network connection, check with pinging IP-number:

Code:

ping -c 3 8.8.8.8

This tutorial shows how to test name service: https://www.howtoforge.com/tutorial/setting-up-your-own-name-service-with-ispconfig/
Also: did you choose reconfigure services during upgrade?

 

ping to 8.8.8.8 is ok (working to other IP address too)
services was reconfigured during upgrade (as with previous upgrades)
Monitor tab shows the same as in previous version
Now I restored /etc and /usr/local/ispconfig from backup, load database ispconfig from backup and all is ok.
I compare the DB dump 3.1.12 with 3.1.13, but no related differences found.

 

/etc/ does have /etc/resolv.conf, so if name server setting in that was changed, then name service might have stopped working (on that host).

 

- the /usr/local/ispconfig i was copied because restore to version 3.1.12
- the /etc/resolv.conf is the symlink to /etc/resolvconf/run/resolv.conf, and the content of the file is in ver. 3.1.12 (after restore)

Code:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 10.0.100.1
nameserver 10.254.1.1
nameserver 192.168.1.1

but in new ver. 3.1.13 (after upgrade) was:

Code:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

Yes, I see this difference, but on the tab Server in the System section the Name Servers are the same in both versions. (10.0.100.1 10.254.1.1)