How to handle connectivity when the other side is misconfigured?

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NAT / PAT is evil.

I have some remote sites outside of my control that don't know how to
configure their video equipment, and won't put their video systems
outside of their firewall.

So, they can connect to me, but then complain that they can't see/hear us.

I'm assuming that the following snippet is why it's not working.

2012/02/28 13:31:21.079 4       ProxyChannel.cxx(7784)  H245
Response: openLogicalChannelAck
2012/02/28 13:31:21.080 5       ProxyChannel.cxx(6742)  RTCP
Reverse 10.202.19.99:3236 to 10.244.1.15:50549
2012/02/28 13:31:21.080 5       ProxyChannel.cxx(6742)  RTP
Reverse 10.202.19.99:3235 to 10.244.1.15:50548
2012/02/28 13:31:21.080 5       ProxyChannel.cxx(9009)  ProxyRTP(0)
total sockets 34
2012/02/28 13:31:21.080 5       ProxyChannel.cxx(1663)  H245    To
send: response openLogicalChannelAck {
    forwardLogicalChannelNumber = 2
    forwardMultiplexAckParameters = h2250LogicalChannelAckParameters {
      sessionID = 1
      mediaChannel = unicastAddress iPAddress {
        network =  4 octets {
          26 7c 27 fe                                        &|'.
        }
        tsapIdentifier = 56906
      }
      mediaControlChannel = unicastAddress iPAddress {
        network =  4 octets {
          26 7c 27 fe                                        &|'.
        }
        tsapIdentifier = 56907
      }
    }
  }
2012/02/28 13:31:21.111 5       ProxyChannel.cxx(803)   H245s
Reading from 204.101.117.205:24144
2012/02/28 13:31:21.111 4       ProxyChannel.cxx(1426)  H245
Received from 204.101.117.205:24131: request openLogicalChannel {

The remote system connection is coming from 204.101.117.205, but the
embedded IP address that's coming through is 10.202.19.99. Am I
correct in thinking that GnuGK is then trying to open a session with
the 10.202.19.99 address and failing, which is why they can't see us?

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