SoftEther VPN User Forum

Hi, cannot hear vpn client while connected via VOIP.
The remote user can hear the caller, but the caller cannot hear the remote user. What is the problem here.
I will only add that I added a remote port 5060.
I would be grateful for help

SIP phones use port 5060 for signalling only and other port/port-range for RTP voice.
Do they work properly directly on your LAN?
Where did you add "remote port 5060"?

Thanks for the answer, but when I'm on the local network it works, but when I connect via vpn and I'm on the local network, it doesn't work.
"Do they work properly directly on your LAN?" - Yes.

On the softether VPN server, I added the appropriate ports in iptales and nothing. Maybe I need to add some virtual ports?

iptables -I FORWARD -p udp -m multiport --dport 16384:32767 -j ACCEPT

I have not tried a Linux SoftEther server yet but here is my equivalent, working VOIP setup:

• Ubuntu OpenVPN server in Layer 2 mode bridging LAN
• a dozen LAN SIP phones
• a few remote SIP phones

All phones are working fine and the only iptables rules are these:

1. iptables -A INPUT -i tap0 -j ACCEPT
2. iptables -A INPUT -i br0 -j ACCEPT
3. iptables -A FORWARD -i br0 -j ACCEPT

solo wrote: ↑

Fri Feb 19, 2021 10:03 pm

I have not tried a Linux SoftEther server yet....

I have just tested a Linux SoftEther server (L2 mode) and confirm that SIP phones work fine with only the default, permissible, iptables' policies.

Later one should modify iptables to improve security, of course.

Yes, but I use L2PT because I don't want to use certificates. I need to use the built-in VPN client in Windows10.