09-05-2007 11:11 PM - edited 03-03-2019 06:37 PM
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
09-05-2007 11:35 PM
There are more protocols on top of IP than just tcp and udp. Permitting IP allows them all.
Regards,
Leo
09-06-2007 05:44 AM
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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