Ping not resolving on Linux?

Weird one, but sometimes some of my virtual machines can’t resolve external web addresses. Ping 8.8.8.8 fine, but ping http://www.google.com 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 127.0.0.1 as the DNS.

Advertisements

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 my@email.com

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 OpenVPN.net 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! 😉