Follow-up to DNS issues
by George RobertsAfter some further research, we’re still pretty confident that any DNS issues that are being experienced are not on our end. From everything we can see, our DNS servers are all responding properly and are returning the proper IP addresses for our gateways.
A recent DNS cache poisoning vulnerability was announced in the last few weeks, and there are reports of it being exploited in the wild. US-CERT VU#800113 contains details of the vulnerability. We do not know whether this may be impacting certain ISPs DNS servers, but it is a supposition based on the evidence we have available to us at this time.
To show that our DNS is working properly, we’ve used DNS Stuff to compile a report for each of our gateways showing that all the root DNS servers list our DNS servers as authoritative and that each of our DNS servers is returning the proper response for our gateway addresses. Click the link for each gateway to see the report. You can use this report when talking with an ISP about them resolving the issue.
July 31st, 2008 at 2:11 pm
Hi,
I still believe there is a DNS issue somewhere - maybe you’re missing an “A” record.. For example AOL does not recognize the MF1 or MF2 servers.
ALL of my users from two different accounts I have with the EasyAntiSpam filtering are not getting email from AOL. Any AOL user gets a rejection email back - FROM AOL - that says the following:
550 5.1.2 … Host unknown (Name server: mf1.ijnet.net.: host
not found)
Final-Recipient: RFC822; webmaster@grq.net
Action: failed
Status: 5.1.2
Remote-MTA: DNS; mf1.ijnet.net
Last-Attempt-Date: Wed, 30 Jul 2008 15:49:21 -0400 (EDT)
Received: from GRQNET@aol.com
by imo-m23.mx.aol.com (mail_out_v38_r9.4.) id u.bde.34406b58 (37117)
for ; Wed, 30 Jul 2008 15:49:17 -0400 (EDT)
Return-Path:
Received: from smtprly-da03.mx.aol.com (smtprly-da03.mx.aol.com
[205.188.249.146]) by cia-ma01.mx.aol.com (v121_r2.11) with ESMTP id
MAILCIAMA013-90fd4890c5bd1ab; Wed, 30 Jul 2008 15:49:17 -0400
Received: from MBLK-M22 (mblk-m22.mblk.aol.com [64.12.136.66]) by
smtprly-da03.mx.aol.com (v121_r2.11) with ESMTP id MAILSMTPRLYDA035-5bbe4890c5ac131;
Wed, 30 Jul 2008 15:49:00 -0400
To: webmaster@grq.net
Subject: test from anthony
Date: Wed, 30 Jul 2008 15:49:00 -0400
X-MB-Message-Source: WebUI
X-AOL-IP: 24.191.210.179
X-MB-Message-Type: User
MIME-Version: 1.0
From: grqnet@aol.com
Content-Type: multipart/alternative;
boundary=”——–MB_8CAC09472630E99_E50_323C_MBLK-M22.sysops.aol.com”
X-Mailer: AOL Webmail 37955-STANDARD
Received: from 24.191.210.179 by MBLK-M22.sysops.aol.com (64.12.136.66) with
HTTP (WebMailUI); Wed, 30 Jul 2008 15:49:00 -0400
Message-Id:
X-Spam-Flag:NO