On 8/15/07, Jay Lee <[EMAIL PROTECTED]> wrote: > Lisa Muir wrote: > > Noticed that sending messages was quite slow, status would say > > "connecting" and then after a time lag would send in zippy time. > > > > This sounds more like a DNS or Identity lookup getting nothing back and > taking 30 seconds to time out. This would explain why it actually works > quite speedy from some computers. Tarpitting should only occur on > connections that send bad commands to the server and should persist only > for the existing connection, not for the given IP entirely. Verify that > /etc/courier/esmtpd has -noidentlookup set for TCPDOPTS. This will > disable the identity lookup, you could do -nodnslookup but that would > disable a lot more than you wanted...
My instinct was to say "no" to that suggestion because a) never had this problem before, and b) the other two sites are identical setups, behind idential routers with the same DSL provider. But when I check it out, mine is the only static ip address of the three sites that doesn't have a reverse zone entry. For now, I'm getting them to create the reverse zone entry to see if that resolves the issue, and later I'll look into the -noidentlookup for TCPDOPTS to see what implications that has. If it resolves this for other customers, great, but hopefully not at the expense of any functionality / security. Lisa. ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
