RTP/T.38 packets not flowing

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    avantune
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    Hi

    we have a Fax over ip server which we use to send out faxes. so the outbound and inbound is working for me however when I try doing a call which originates from my server and terminates to a different user in our own organization behind same fax server, I see that media packets are not flowing whether be T38 or G711. below are the port forwarded rules implemented on FW. we have public IP binded to the interface ETH1 which is forwarding packets to/from our fax server to Telco

    0 0 ACCEPT udp — * * 209.58.xxx.xxx 10.30.xxx.xx udp dpts:5000:5060
    0 0 ACCEPT udp — * * 209.58.101.235 10.30.xxx.xx udp dpts:5000:5060
    0 0 ACCEPT udp — * * 0.0.0.0/0 10.30.xxx.xx udp dpts:6000:60000 /* RTP_GC_VOLV1 */

    Appreciate if someone can give us any input on what could be the issue.

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