UPDATE your DNS server!

You did not forget, right?
There is an errata which affects nameserver called bind. There is an issue with DNS cache-poisoning, reported by Dan Kaminsky.

Want to see if you are affected? Check out DNS Poison Checker.

Check out errata RHSA-2008:0533.

Red Hat released fix 13 days ago, with Severity IMPORTANT. Nice.

Today, there will be a leak of this security flow. Expect to get hacked/scammed? Well, you can, if you don't update.

1. backup BIND configuration files {named.conf, all zones}
2. yum update bind / up2date --update bind
3. service named restart
4. Test zones.

Red Hat would like to thank Dan Kaminsky for reporting this issue.