FW: Problems with Exchange 2000 as open relay
From: Haluk Aydin (haydin_at_BIZNET.COM.TR)
Date: 12/19/03
- Previous message: Russ: "Administrivia #30794 - NTBugtraq considered a Power to be considered"
- Maybe in reply to: rotaiv: "Problems with Exchange 2000 as open relay"
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Date: Fri, 19 Dec 2003 11:43:05 +0200 To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM
>Few would ever need to configure a firewall to NAT like that (both the
>source and destination address) the source IP address of an incoming
>packet never changes through a typical (simple) firewall NAT. These are
basic concepts of NAT and Routing TCP/IP.
Yes NAT does not change the source address, but if they are using a
firewall with smtp proxy, the incoming packets seem to come from
internal network. You can check several firewalls like Checkpoint's smtp
resource (or security server).
Haluk AYDIN
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Most viruses these days use spoofed email addresses. As such, using an Anti-
Virus product which automatically notifies the perceived sender of a message
it believes is infected may well cause more harm than good. Someone who did
not actually send you a virus may receive the notification and scramble
their support staff to find an infection which never existed in the first
place. Suggest such notifications be disabled by whomever is responsible for
your AV, or at least that the idea is considered.
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- Previous message: Russ: "Administrivia #30794 - NTBugtraq considered a Power to be considered"
- Maybe in reply to: rotaiv: "Problems with Exchange 2000 as open relay"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
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