just an FYI… setting the asterisk machine as the DMZ host would route everything from the external ip to that internal host. yes its an internal ip but the DMZ makes it visible to the net. 
Well, i’m bloody glad you finally solved that problem! I was beginning to wonder if i was going mad - or maybe you were!
We’d been through everything possible and it still didn’t work. Network problems makes sense! A bodgy ISP, ey?
Oh well, this is the longest thread i’ve seen on this forum so far, anyway!
yep, i knew we would get their 
now my X100 isnt installing, fancy a go at that?
I don’t know the first thing about them - i’m pleased to say! 
kewl,
ill let you off this time.
PS i fixed it