Mailinglist Archive: opensuse-security (636 mails)

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SuSE-Mailing list from an unregistered server?
  • From: Andreas Kisslinger <SuSE-Security@xxxxxxxxxx>
  • Date: Wed, 14 Feb 2001 11:16:28 +0100
  • Message-id: <3A8A5AFC.7D7BF192@xxxxxxxxxx>
Hello SuSE-Security,

I'm receiving several SuSE mail lists, but it's interesting, that an access
denied event for the destination UDP:53 ist reported by our external
Cisco (I'm blocking all IANA reserved and private IP networks), near the time an
email from the SuSE-Security arrives.

I'm having warnings from Postfix (MTA) that can't be

It seems, that is using an private IP address for DNS communication to
the internet.

Here is a small nslookup result:
>>nslookup -type=NS
>Server: localhost
>Non-authoritative answer:
> nameserver =
>Authoritative answers can be found from:
> internet address =

I think that's not really conform to the internet standards, isn't it? >;->

Best regards,
Andreas Kisslinger

----------- Some extracts from the logs ------------
Feb 12 15:39:43 MY-EXTERNAL-ROUTER 35147: Feb 12 14:39:42.002:
%SEC-6-IPACCESSLOGP: list 110 denied udp MY-DNS-IP(1458) ->, 1

Feb 12 15:40:10 gw1 postfix/smtpd[13314]: warning: hostname host1. verification failed: Host not found, try again

And the content of the mail arriving at this moment:
Received: from (unknown []) by MY-MAIL-HOST
(Mailer) with SMTP id CBBEE1F89 for <SuSE-Security@MY-RECEIVING-DOMAIN>;
Mon, 12 Feb 2001 15:40:35 +0100 (CET)

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