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Old 05-19-2009, 04:24 AM   #1
priyadarshan
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Registered: Feb 2009
Location: Ahmedabad, Gujarat, India
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IPTables

Does IPTables support protocols other than TCP, UDP, ICMP ???

How to block others like IGMP, GRE etc.?????
 
Old 05-19-2009, 05:09 AM   #2
linuxlover.chaitanya
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Registered: Apr 2008
Location: Gurgaon, India
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An excerpt from man page of iptables
Code:
 The  protocol of the rule or of the packet to check.  The speci‐
              fied protocol can be one of tcp, udp, icmp, or all, or it can be
              a  numeric  value, representing one of these protocols or a dif‐
              ferent  one.   A  protocol  name  from  /etc/protocols  is  also
              allowed.
And hence from my system I can tell IGMP and GRE are supported.
 
  


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