Unable to lookup host 'localhost.localdomain'

Hi,
I’ve recently added a network card to my Asterisk system (CentOS 4) and eversince then I get following errors reported at CLI:

WARNING[10503]: pbx_dundi.c:4584 set_config:Unable to look up host 'localhost.localdomain’
WARNING[10503]:chan_skinny.c:3154 reload_config:Unable to get our IP address, Skinny disabled
WARNING[10503]:chan_mgcp.c:4209 reload_config:Unable to get our IP address, MGCP disabled

This does not appear to be an obstacle for Asterisk however, as it is working normally…
What is the problem and any usefull links for resolving it?

your /etc/hosts file should probably contain the line