Dear bind users! I have set up ISP bind 9.4.2-39.2 and ICP DHCP 3.0.6-86.1 for a local network of me.
The dhcpd issues leases to my local machines. Then it updates my DNS-zones accordingly. I use a TSIG-key for the authentication between DHCP and BIND, so that only DHCP is allowed to manipulate my zones. So far so good. This setup worked for about a week very smooth and without any problems. Since a few days I have heavy problems with the resolved of foreign domain-names. Often these are not resolved properly and the clients receive "Address not found" errors, e.g. in their browsers when they try to access some websites. Having a look in the syslog I am receiving the following error message: FORMERR resolving '<domainname>/A/IN':<IP>#53 Example: Nov 7 15:23:14 computername named[<processed>]: FORMERR resolving 'static.cache.l.google.com/A/IN': 217.237.150.188#53 I receive 15 of these messages for each attempt to resolve a single address! With other words my syslog is full of those messages! The messages are all the same, except of the IP address at the end. Having had a closer look to this IPs I realized, that the 15 IPs are the IPs of my forwarders and of the root-servers found in the root.hint of bind!! I have tried other forwarders, but with no cure to the problem. The funny thing is, that when I restart bind (rcnamed restart) for some minutes everything works like a charm! But then suddenly: FORMERR, FORMERR, FORMERR!! What could the cause be for this strange behavior?! Thanx for every hint and peace of information!! Best regards Tom Root