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Vpn l2tp on Mikrotik for voip asterisk server UNREACHABLE 5060

Thu Jun 13, 2019 5:19 pm

Hello
I am using mikrotik router for express vpn config l2tp, for a call center that have one asterisk server on vpn network.
Every thing is going well but one day the asterisk carriers are go UNREACHABLE, can not be connected with voip provider port 5060.
sip show peers
carriervoip 193.xxx.xxx.194     5060         UNREACHABLE
If I disable the L2tp vpn all carriers will be connect.
I make some test and checking TORCH I notice that src IP of Voip provider is not going to my local asterisk 192.168.2.10 or on my Dst vpn IP 10.0.1.236.
But is go to my fist IPS router that is routing from 192.168.1.0/24 to my mikrotik 192.168.2.0/24.
And ip 192.168.1.3 is IP of mikrotik on first ISP router that is take DHCP Client.
Image

IP 10.0.1.236 is the vpn
192.168.2.0/24 is my lan
The vpn is ok and I access internet from different Ip from my vpv.
What can I do in this case?
Besause in another office with the same vpn config and mikrotik, asterisk is work ok.
Here is the config tha I setup on mikrotik
Image

Image

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