Just ping can cause DOS attack by Ping flooding. So if not needed for mail gateway, we can disable ping on our mail gateways.
Regards Sujit -----Original Message----- From: Exim-users [mailto:[email protected]] On Behalf Of Marc Haber Sent: 03 July 2015 17:02 To: [email protected] Subject: Re: [exim] mail gateway requirements On Fri, 3 Jul 2015 14:26:11 +0000, Paul Havinden <[email protected]> wrote: >>On 03.07.2015 11:58, Sujit Acharyya-choudhury wrote: >>> We have seen recently two DoS attacks on our mail gateways, but the >>> machines and Exim coped well. Our network administrator suggested to >>> block ping, but from my previous experience elsewhere it cause some >>> problem - I cannot recall exactly what. Any thoughts on this. I know it >>> is Out of Topic. >>You mentioned that you suspected DOS attack on your mail gateway previously >>but never provided any >details. I suspected some major misconfiguration on >>your side, like running an open relay or a policy of >accept-then-bounce, >>which would be very serious issues that have to be solved. > >>I you don't want to disclose any details on this list, you should consider >>hiring external consulting. > >We block pings to out mail servers and it's doesn’t appear to cause any issues. And what does it help? Greetings Marc -- -------------------------------------- !! No courtesy copies, please !! ----- Marc Haber | " Questions are the | Mailadresse im Header Mannheim, Germany | Beginning of Wisdom " | http://www.zugschlus.de/ Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 621 72739834 -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
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