Search Again: Re: Lame Delegation From: Men & Mice Support Date: Wednesday, June 2, 1999 Time: 11:43:00 pm >>Spam. A spammer was apparently trying to send scads of mail through your >>server, which was trying to verify the sender's name with your name server. >>The name server was running into a lame delegation and was thus unable to >>give the mail server a good answer. That's my guess. > >I'm assuming I have the same problem? Lots of "Lame Delegation...". > >I also get "Dropping Bogus Reply from..."? > >Is there something I need to do? A bogus reply is a reply to a query that QuickDNS Pro did not send. It most often happens when a server sends a response twice. I'd guess it's most likely to occur in high-traffic conditions. Lame delegation happens when a server delegates a subdomain to a server that doesn't have the zone file. As an example: e.root-servers.net has the following records: domain.com. NS ns1.domain.com. domain.com. NS ns2.domain.com. ns1.domain.com. A xxx.xxx.xxx.xxx ns2.domain.com. A xxx.xxx.xxx.xxx When queried for www.domain.com, ns1.domain.com gives one of the following non-authoritative responses: domain.com. NS ns2.domain.com. or com. NS a.root-servers.net. com. NS b.root-servers.net. et cetera If you're seeing a lot of lame delegation and bogus reply errors in a short amount of time, this probably means that someone is querying your DNS server for a large number of hosts outside your domain. If the machine that's asking is your mail server, it's a good bet somebody's sending large amounts of mail through it (or trying to). To somewhat remedy this problem, use a mail server that prevents mail relaying. Eric, I ran a quick test of macweb.com with DNS Expert, just checking mail records and security, and found a couple of errors you should be aware of: The name server "ns1.macweb.com." is vulnerable to spoofing attacks. You can solve this by upgrading to the latest version of QuickDNS Pro. The primary mail server "mail.macweb.com." can possibly be used as a mail relay. The primary mail server "mail.macweb.com." can possibly be used to process a mail message where neither the sender nor the recipient is a local user. ____________________________________________________________________ Chris Buxton Men & Mice cbuxton@menandmice.com http://www.menandmice.com

Messages In This Thread: Lame Delegation by Tony on May 25, 1999 at 3:23:00 pm Re: Lame Delegation by Men & Mice Support on May 25, 1999 at 10:48:00 pm Re: Lame Delegation by Eric Bickford on Jun 2, 1999 at 2:19:00 am Re: Lame Delegation by Men & Mice Support on Jun 2, 1999 at 11:43:00 pm Re: Lame Delegation by Eric Bickford on Jun 3, 1999 at 12:05:00 am Re: Lame Delegation by Donovan Rittenbach on Jun 3, 1999 at 11:20:00 pm Re: Lame Delegation by Men & Mice Support on Jun 4, 1999 at 1:09:00 am Re: Lame Delegation by Joseph D''Andrea on Jun 4, 1999 at 12:56:00 pm Re: Lame Delegation by Donovan Rittenbach on Jun 5, 1999 at 7:48:00 pm Re: Lame Delegation by Men & Mice Support on Jun 5, 1999 at 8:21:00 pm Re: Lame Delegation by Donovan Rittenbach on Jun 5, 1999 at 8:27:00 pm Re: Lame Delegation by Donovan Rittenbach on Jun 5, 1999 at 8:47:00 pm Re: Lame Delegation by Men & Mice Support on Jun 9, 1999 at 5:58:00 am Re: Lame Delegation by Men & Mice Support on Jun 9, 1999 at 6:19:00 am Re: Lame Delegation by Eric Bickford on Nov 22, 1999 at 2:30:00 am Re: Lame Delegation by Men & Mice Support on Nov 22, 1999 at 11:22:00 am Re: Lame Delegation by Fabio Cristian Sestilli on Aug 30, 2001 at 6:54:08 am