Mailing List CGatePro@mail.stalker.com Message #106962
From: Ralf Zenklusen, BAR Informatik AG r.zenklusen@barinformatik.ch <CGatePro@mail.stalker.com>
Subject: AW: [CGP] SMPT Receiving Option "Reverse Connect" and backscatter
Date: Thu, 20 Sep 2018 14:05:54 +0200
To: CommuniGate Pro Discussions <CGatePro@mail.stalker.com>
X-Mailer: CommuniGate Pro MAPI Connector 1.52.54.12/1.54.12.21
Well yes, "Reverse Connect" can be seen as an intrusion.
I would recommend to disable this.

On the other hand backscatter.org is untrustworthy and nobody should seriously us it.
The same applies for "UCE Protect" btw.


Kind regards

Ralf Zenklusen
Dipl. El. Ing. HTL
Leiter Internet            
 
BAR Informatik AG
Weidenweg 235
3902 Brig-Glis
Tel +41 27 922 48 48      
www.barinformatik.ch
www.rhone.ch
 
r.zenklusen@barinformatik.ch

-----Urspr√ľngliche Nachricht-----
Von: CommuniGate Pro Discussions [mailto:CGatePro@mail.stalker.com]
Gesendet: Donnerstag, 20. September 2018 12:54
An: CommuniGate Pro Discussions
Betreff: [CGP] SMPT Receiving Option "Reverse Connect" and backscatter


CGP : 6.2.4 : Linux SuSE


Hello,

For a very long time we have had enabled the SMTP-receiving
Verify-Option "Reverse Connect".

Now we have one Server-IP/Domain that seems to be listed in the
backscatterer DB and we learned on the backscatterer.org site, that
reverse testing of an sending email-address for its existence (Sender
Verify) is "problematic".

Thus we are wondering, if it would be wise to disable on ours CGPs the
"Reverse Connect" option?



Many thanks in advance for any advice and best regards,

André




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