[CentOS] SYD flood dropped on Sendmail (centos 4.x)

Chris Heiner cheiner at networkdesignsinc.net
Thu Nov 20 16:48:50 UTC 2008


My guys,

 

My firewall seems to block an attack my Centos / Sendmail boxes on port 110.
These servers require a reboot after each attack. My firewall says it's
blocked? Do I need to patch something on sendmail? Or is my firewall not
doing its job (Sonicwall)? This is not the first time this has happened.

 

 

11/20/2008 02:53:04.864 -       SYN flood attack dropped -
75.2.205.141, 48102 -   10.80.80.210, 110

11/20/2008 03:08:04.864 -       SYN flood attack dropped -
75.2.205.141, 64955, greatcooks.biz -   10.80.80.220, 110

11/20/2008 03:23:08.864 -       SYN flood attack dropped -
75.2.205.141, 43068, greatcooks.biz -   10.80.80.210, 110 

 

 

Any input would be much appreciated.

 

Thanks.

 

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