05-01-2005 12:38 PM - edited 03-02-2019 10:38 PM
NAT Overload works when its translate the source ip to the "legal address" and also translate the source port to a unique source port.
ICMP dosent works with ports (as long as i know) how a network device can send icmp packets and recive them while paritcepating in nat overload.. ?
05-01-2005 05:01 PM
If you look at sh ip nat translation icmp command, you can see the inside global, inside local, outside local/global addresses are mapped on the table using a single port address. So when the packet returns from a particular host, the router will translate the destination address back to the right source address.
05-01-2005 10:34 PM
thanks i have another question
each entry in the icmp nat translation using a single port address . Are There any chances that another host will pick the same port causing the router change it to another port..
because i looked at the doucment :
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080093f96.shtml
and i save that each translate connection has a same port ..
my quesion is if another PC sends ping packets and he uses the same port like another PC that allready has a translation entry.. lets assumpe thaht the destination IP is the same.. what wiil happen in this case..
thanks a lot
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