Yes, I've seen that this week as well.
On 6/2/2012 12:44 PM, Sahil Tandon wrote:
I am seeing hundreds (on higher volume days, over a thousand) of lines
like:
Jun 2 10:04:30 mx1 postfix/dnsblog[58868]: warning: dnsblog_query:
lookup error for DNS query 23.124.167.115.b.barracudacentral.org: Host
or domain name not found. Name service error for
name=23.124.167.115.b.barracudacentral.org type=A: Host not found, try
again
Jun 2 10:04:33 mx1 postfix/smtpd[89019]: warning:
17.204.24.8.b.barracudacentral.org: RBL lookup error: Host or domain
name not found. Name service error for
name=17.204.24.8.b.barracudacentral.org type=A: Host not found, try
again
Jun 2 10:04:37 mx1 postfix/postscreen[55753]: warning: dnsblog reply
timeout 10s for b.barracudacentral.org
These lines are interspersed among others that indicate more "normal"
activity with b.barracudacentral.org, e.g.:
Jun 2 10:04:10 mx1 postfix/dnsblog[55985]: addr 199.30.50.35 listed by
domain b.barracudacentral.org as 127.0.0.2
Jun 2 10:04:47 mx1 postfix/dnsblog[66369]: addr 157.56.112.23 listed by
domain b.barracudacentral.org as 127.0.0.2
I know this is not an issue with Postfix (which dutifully reports the
TRY_AGAIN it receives from the system library), but I wonder if anyone
else is seeing this from barracuda? Based on a week's worth of logs, I
do not see even a single instance of this problem with any other RBL
(and we query several).
I've separately engaged our DNS admins in case they could offer some
insight, but it would be interesting to learn if others are experiencing
the same issue /only/ with barracuda.
