Example of a phone ticket error : (DNS problem: Send error: Network is unreachable)!
This is the indication that my DNS is not working correctly, however I cannot seem to find the issue to fix it.
However, I cannot access the internet or ping any other server or device outside of the 111.22.3.xxx pool.
Doesn't appear to be an OTRS issue. Seems to be a network issue. The key being "Network is unreachable". Indicating that the server cannot contact the DNS server. I would recommend contacting a network group. That said... Seems like you can ping locally by IP but can you ping external hosts by IP? If that doesn't work verify that you have a valid gw IP (netstat -rn ... Look for Entry on the 0.0.0.0 net). Last is check your gw/firewall (both locally and external). Your problem doesn't have anything to do with OTRS. Q out