After a firmware upgrade last night my 2920 ended up oin constant loop so I had to drag out my 2820.

The only problem I've got now is that I can't connect to my web cams via internet. I've set up port forwarding but I must be missing something.

The settings I've got are as follows

Mode SingleRange
Service Name camera name
Protocol ---UDP
WAN IP 1.All2.WAN IP Alias[1]188.222.215.219
Public Port - 8153
Private IP - 192.168.1.57
Private Port 8153

The y-cam reports udp enabled and the address to use is : http://188.222.215.219:8153

But it doesn't work so what am I missing?

Try both TCP and UDP?

udp may now be enabled, as an addition, but my guess is that TCP is the first route in, with the ability to also reply with UDP

Well I managed to repair my old 2920 and put that back in. I can see the camera's again.
Interestingly two of the camera's had changed the port number so when I loaded them up they showed they showed the wrong camera which suggests on the 2920 port forwarding isn't needed with udp. It also suggests the 2820 firmware I've got doesn't work with udp.