Is there a way to preserve the source port for UDP packets that use a PAT pool?
Here is what I need:
The client (220.127.116.11) sends a UDP packet from port 5060 to port 5060 on our external 18.104.22.168. This packet is port forwarded to our internal server 10.10.10.10 with the original source and destination port. The server then sends a UDP response to the client from port 5060 to port 5060. The server is in a PAT pool that only contains the address 22.214.171.124. The ASA changes the source port and our client ends up rejecting the packet because the source port is not what it expected.
How can I preserve the original source port when the packet goes through the PAT pool?
I am not quite sure what you mean. I am also pretty unfamiliar with the actual setup.
I guess the configurations mentioned above would enable the local devices to source their traffic from the UDP/5060 port but as long as we are using a single public IP address the inbound traffic on a single destination port of UDP/5060 to my understanding can only be matched towards a single local IP address.
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