OS: GNU/Linux Debian 9.2 64-bit
I disabled IPv6 on one of my servers.
And now I'm getting this in mail:
exim paniclog
...
IPv6 socket creation failed: Address family not supported by protocol
How do I get rid of it?
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2 Answers
First of, man needs to disable IPv6 in exim4.
In the following file:
/etc/exim4/update-exim4.conf.conf
Make sure this line is there, if not, add it, or change it:
disable_ipv6='true'
But I tried only this solution and the mail is still coming, so digging further...
In the same file, make sure this line is set to true:
dc_minimaldns='true'
Now edit this file:
/etc/hosts
Let's suppose, this line defines your server name:
127.0.1.1 server-name
Change it as follows:
127.0.1.1 server-name.localhost server-name
Now, verify, that this command:
hostname --fqdn
Returns:
server-name.localhost
If so, you can update your Exim4 configuration:
update-exim4.conf
And restart the Exim4 service:
systemctl restart exim4.service
answered Nov 29, 2017 at 7:30
Vlastimil Burián
31.3k66 gold badges211 silver badges358 bronze badges
Maybe the exim4 config has improved as of late, but I didn't have to do any of the steps in your answer, Vlastimil.
Instead, in /etc/exim4/update-exim4.conf.conf I had the line:
dc_local_interfaces='127.0.0.1 ; ::1'
and so I just updated that to:
dc_local_interfaces='127.0.0.1'
ran update-exim4.conf then systemctl reload-or-restart exim4.service and it's been fine since. Without an ipv6 interface defined, none of the other ipv6 settings are needed. I deleted the paniclog and it hasn't come back!
