STUN server "stun.ekiga.net" replies Blocked, external IP 127.0.0.1

I am getting the "Ekiga did not manage to configure your network 
settings automatically" message.  I have followed the instructions and 
checked my router settings, which seem correct (I think I have used 
Ekiga before without this problem).

Using the command: ekiga -d 4 2>&1 | grep STUN
I get:

2015/04/03 15:02:04.701	  0:02.756	                       	Ekiga	Started 
STUN detector
2015/04/03 15:02:07.171	  0:05.226	StunDetector:0xad47db40	STUN	No 
response to STUN server 77.72.174.167:3478
2015/04/03 15:02:07.172	  0:05.226	StunDetector:0xad47db40	OPAL	STUN 
server "stun.ekiga.net" replies Blocked, external IP 127.0.0.1
2015/04/03 15:02:08.556	  0:06.610	 Housekeeper:0xad8dab40	Ekiga	Stopped 
STUN detector
2015/04/03 15:02:11.091	  0:09.146	  subscriber:0xaac14b40	STUN	STUN 
server 77.72.174.167:3478 unexpectedly went offline getting external 
address.

If the STUN server is replying to 127.0.0.1 then I imagine that the 
router would block it since this is just a loopback address.

Any suggestions about what is wrong.

John