Of course, even if I can get Sipgate to work, I still don't have proxy and stun server information for Cosmote (I don't know if they exist). With these new settings, the Sipgate account is now registering ok (green light) but making calls is still impossible (SIP error 408 = timeout). With some experimentation, I got the Sipgate account to register by using these new settings in the Fritzbox:Īnd also setting up manual port forwarding in the HA35 for port 5260 in addition to the DMZ (just to be sure). None of them could register and connections timed out. I have tried several SIP providers, firstly of course Cosmote but also Sipgate and Plivo. However that is of no use to me, as all my phones are wireless/DECT and connected to the Fritzbox Putting the Cosmote VoIP details directly into the HA35 ( etc.) works, the account will register and show as 'Online'.

Manually trying to set up port forwarding for 5060 on the HA35 brings up this message: I have found that it seems that the HA35 is not forwarding port 5060 to the Fritzbox, regardless of the DMZ setting

All other services (such as MyFritz remote configuration, VPN to Fritzbox etc.) are all working without problems My old configuration was to have the Fritzbox directly connected to the internet in that setup, everything works flawlessly, so I can be sure that there are no errors in my SIP configurations (I got the password from 13888) and was able to call without problems for many monthsĤ. I have followed the steps outlined here for putting another router behind the HA35ģ.

I believe this is because HA35 is keeping SIP ports 'for himself'.Įverything else (VPN.) is working without problems.ĪDSL/4G <- Cosmote Home Speed Booster Huawei HA35-10 <- Fritz!Box 7490 International, Firmware 07.12Ģ. VoIP/SIP connections are not working anymore since I put my Router (Fritzbox) in a DMZ behind the Cosmote Home Speed Booster. Hello, I hope it's okay to write in English as my Greek is not very good

Cosmote wifi hack online