Tag: Debian

Today I had to do some bind9 configuration and here are the results for my future self.

Nowadays the Debian bind package is prepared to use IPv6. In case your server has no IPv6 connectivity yet, lots of errors appear in the logs. Most of them can be ignored, but at least they look ugly. So if you know that you do not need IPv6 add ‘-4’ to the OPTIONS-line in /etc/default/bind9.

If you get an error like “refused notify from non-master” and the IP of non-master is your own host, you need to accept notifies from yourself. Just add something like ‘allow-notfy { n.m.o.p; };’ to the options{}-section (n.m.o.p should be your own IP). On Debian systems this is in /etc/bind/named.conf.options.

Of course there are millions of posts with similar content. But instead of storing a bookmark in one browser, I prefer to collect such knowledge at a central place.

In case you are working with Debian Wheezy and exim4 and want to create a mailbox, that gets all emails to unknown addresses, the following has to be done:

1. edit /etc/exim4/exim4.conf.template and look for router/400_exim4-config_system_aliases
2. change line data = ${lookup{$local_part}lsearch{/etc/aliases}} to
   data = ${lookup{$local_part}lsearch*{/etc/aliases}}
3. add all valid users to /etc/aliases (like heinz: heinz)
4. call update-exim4.conf
5. restart exim4 /etc/init.d/exim4 restart

Disadvantage:

• You need to insert all local users to /etc/aliases, but this could be managed during user creation
• This does not work in case you set dc_use_split_config to ‘true’