Net2phone IPs on blacklist

[jcostlow]

Hi Everyone,

Earlier today we got alerts from multiple instances we manage that their SIP trunk (Net2phone) lost registration and then re-registered. At first I didn't think anything of it.

A few hours after that I got alerts from one PBX that both IPs for the US POP were blacklisted. After that I got alerts that registration failed which makes sense if the IPs were blacklisted.

Is it just the one PBX that blacklisted or is there a chance the Net2phone IPs accidentally got globally black listed? One IP was automatically removed and the one pictured I had to remove.

Here is one IP in black list: Here is nslookup showing both IPs:

 

[Naveen | Cal4care]

Hi jcostlow,

This IP is not globally blacklisted. In the past, we also encounter this issue sometimes for SIP Provider and Gateways. As per my understanding, the IP will be blacklisted if 3CX receives multiple requests at same time from the SIP Provider or Gateway.
In order to avoid this issue, we have Whitelist the SIP Trunk IP in 3CX.

 

[jcostlow]

Thanks, I just figured I'd ask since multiple systems were having similar issues.