Ping not resolving on Linux?

Weird one, but sometimes some of my virtual machines can’t resolve external web addresses. Ping fine, but ping and you get an ‘unknown host’ error.

Seems to be a problem with resolv.conf – always check /etc/resolv.conf and see if it is pointing to as the DNS.


LDAP issue with sendmail

For some reason, I suddenly stopped receiving email notifications of my voicemail from my trixbox server. A bit of hunting around, I discovered the following error in the logs, or when I tried to manually send mail using sendmail:

451 4.3.5 Error getting LDAP results in map ldapsx: Unknown error 325
sxadmin-scalix@scalix... Deferred: 451 4.3.5 Error getting LDAP results in map ldapsx: Unknown error 325

All of this occurred after I changed my DNS suffix on my new router. To fix the problem, I updated the OMHOSTNAME setting in /etc/opt/scalix/instance.cfg to what the fully-qualified name was et voila! All working when I use the following test code:

echo "Subject: test" | /usr/lib/sendmail -v

Building a VPN

So, being the holidays and everything, I thought it would be useful to be able to dial-in to my home network and get access to all my local network resources. I first tried to do this when I was in San Francisco over Putty SSH. Can I just note for everyone reading this that this is not a good idea because if anything goes wrong (like when trying to create a new bridged interface), your network connection goes down…and so does your SSH connection!

But I’ve had a bit of better luck following the howto on and have got it so that I currently have a routing connection (not bridged) up and running. So an internal IP address now accesses my server, and I’m able to access the Samba shares, and the VOIP network as well! 🙂

Now, I’m just going to work on bridging the network…when I get home! 😉