PAT and Portless Protocols

[m.mohanasundaram]

hello all,

Is my following understanding correct?

Port Address Translation (PAT) will work only for portocols that has ports (UDP, TCP) and will not work for portless protocols such as ICMP, EIGRP, OSPF, ESP etc. This applies to PIX and IOS as well.

But I see ICMP working fine across PAT. How is this possible? How does the PATting device map when there are multiple inside hosts pinging multiple outside hosts?

Can anyone throw more light on this.

Thanks in Advance,

Mohan

[froggy3132000]

ping to an outside host from an inside host

then on a pix do

sh xlate

or on IOS

sh ip nat trans

There is your answer