iptables: Remove --to-ports from MASQUERADE rules #9
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Removed
--to-portsfrom MASQUERADE rules of iptables to accept multiple sessions when using DNAT.--to-portsis to be used to specify a port range for masquerading.https://manpages.debian.org/bullseye/iptables/iptables-extensions.8.en.html#MASQUERADE
The latest implementation specifies only one port for
--to-portsprovided byfst_port, which means masquerading always tries to use the same port for its source port.Therefore, another session to the same DNAT destination host will not be able to be established unless the previous one is closed.
When a gateway is placed in front of SDP Controller with DNAT, the gateway cannot foward connections from multiple SDP clients.