Update Your Firewall

SignalWire does not publish a list of IP's for public consumption as IP's may change. Customers can periodically run a command, or create a service to update firewalls regularly:

dig sip.signalwire.com | egrep ^sip | awk '{ print $5 }' | xargs -n1 -I{} iptables -A INPUT -s {} -j ACCEPT

dig relay.signalwire.com | egrep ^relay | awk '{ print $5 }' | xargs -n1 -I{} iptables -A INPUT -s {} -j ACCEPT

dig firewall.signalwire.com | egrep ^firewall | awk '{ print $5 }' | xargs -n1 -I{} iptables -A INPUT -s {} -j ACCEPT

It is highly recommended to use domain-based authorizing as those are subject to change! Media comes from a wide variety of locations and is non-deterministic.