Pls clear about TCP and IP

Unanswered Question
Sep 5th, 2007

Hi

we use in router or firewall

permit/deny tcp any any or host

permit/deny udp any any or host

permit IP any any or host.

we all port (65000) are include in TCP and udp. so why we use IP protocol if we not use it then what is effeft.

PLs clear to me easily.

Thanks

Biplob

I have this problem too.
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lgijssel Wed, 09/05/2007 - 23:35

There are more protocols on top of IP than just tcp and udp. Permitting IP allows them all.

Regards,

Leo

Richard Burts Thu, 09/06/2007 - 05:44

Biplob

Leo is quite right that there are other protocols running on IP that are not TCP and not UDP. Examples of these other protocols include ICMP, EIGRP, OSPF, GRE, ESP (for IPSec). You can permit or deny for TCP and UDP using their port numbers. Permit or Deny for IP is the easy way to cover these other protocols.

HTH

Rick

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