I have a Voice Soft Switch running behind the VyOS router. This connects to another Soft Switch via IPSec tunnel. Tunnel is up. But we cannot make calls. We can see lots of malformed packets. Technician at the other end says, Vyos isn’t able to manage ISUP part of the SIP packet. Is there anything i could do with VyOS to fix this?
ISUP is an SS7 protocol, typically your gateway translates ISUP messaging <-> SIP messaging, but it can be transmitted “transparently” between gateways. So, to confirm precisely what is happening, can you definitively say you are doing the latter?
Can you provide more detail about what “malformed” packets means?
Can you post your config? Can your provider be more precise about what “corrupted” means? There isn’t really any “processing” per-se that VyOS would normally do, packet data is just bits and bytes.
Awesome, after disabling sip conntrack we can initiate the calls. Thanks very much. But now we face another problem. Only one side can hear the calls. Other side party cannot hear the audio.
When we checked, we identified that other end voip switch forward RTP packets to the IP behind the NAT, not to the Nated IP. IP behind the NAT appears at SDP. In my VyOS i configured one to one NAT. Am i missing anything?