Citiraj:
Autor Nikky
You said you would like to use the ipsec and sip features, both you could solve this way:
- Define which ports use IPSec (by a version of IPSec)
- In PortForward function of ZyXEL (should you be available), open ports
- Take / get another WAN router with IPSec feature and set IPSec connection
It should work.
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Unfortunately it doesn't work. I tried. I have a Fritzbox that I previously used and which is now NATed behind the Zyxel. But the Zyxel doesn't seem to forward ESP packets, at least with the current limited Iskon firmware (only TCP/UDP worked). I also tried putting the Fritzbox in the DMZ zone, but IPsec packets were still not properly forwarded.
Citiraj:
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Unfortunately you have / you chose an ISP that pushes a lot of restrictions.
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I agree. Someone recommended them to me and also handled the ordering and everything. Of course he had no idea, and when I asked him, he said that most Croatian ISPs restrict their routers and the choice of routers.
Citiraj:
I'm not sure if you can get a Bridge mode for Internet connection,
then things would be a little easier.
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I agree, a bridge mode would solve a lot of problems considering that even port forwarding is kinda limited (see above). I'd basically use the Zyxel just as a modem, and have another router (my Fritzbox) do all the rest.