I have read and reread the instructions and wonder if they are relevant to MacOS 10.7. Here is what I got from the bug report which I don't understand at all:
2013-10-09 14:33:09 +0000 port-forwarding.c:183 [Info] Port Forwarding: Stopped
2013-10-09 14:33:12 +0000 natpmp.c:73 [Info] Port Forwarding (NAT-PMP): initnatpmp succeeded (0)
2013-10-09 14:33:12 +0000 natpmp.c:73 [Info] Port Forwarding (NAT-PMP): sendpublicaddressrequest succeeded (2)
2013-10-09 14:33:12 +0000 upnp.c:214 [Debug] Port Forwarding (UPnP): UPNP_GetValidIGD failed (errno 0 - Undefined error: 0)
2013-10-09 14:33:12 +0000 upnp.c:217 [Debug] Port Forwarding (UPnP): If your router supports UPnP, please make sure UPnP is enabled!
2013-10-09 14:33:12 +0000 port-forwarding.c:95 [Info] Port Forwarding: State changed from "Not forwarded" to "Starting"
2013-10-09 14:33:21 +0000 natpmp.c:78 [Debug] Port Forwarding (NAT-PMP): readnatpmpresponseorretry failed. Natpmp returned -7 (the gateway does not support nat-pmp); errno is 61 (Connection refused)
2013-10-09 14:33:21 +0000 port-forwarding.c:95 [Info] Port Forwarding: State changed from "Starting" to "???"
Any thought VERY MUCH appreciated