IPCETRIX  Freshman Member

Hi! Thank you all for your professional advice. Apparently from the firmware 4.39 and above ZyXel restrict all users from Admin group to use SSL. Don't ask me why as I have no explanation. Moving user from Admin to User group resolve the problem. Second issue was that we shift HTTPS listening port from 443 to XX443 for…

I would suspect that one of your SIP devices has been compromised. How many SIP devices installed in your LAN? Try to change all SIP accounts passwords and Admin users passwords of PBX. SIP session can be established from inside your LAN to external SIP 5060. What ZyXel firewall you use? Also you can create Packets Capture…