Hello List, I have tried to read as much as I could and try out a bunch of things but it doesn't seem to be working. The scenario is that we have a FS setup as a call distributor to our internal SIP servers. The calls come into the FS when people call any of the 6000 or so DIDs we own. These DIDs are through various providers who's IP addresses we know (obviously). I want to receive / process only calls from these external IP addresses and nothing else. So I did the following in acl.conf.xml file <list name="DIDProviders" default="deny"> <node type="allow" cidr="64.XXX.XXX.XXX/32"/> <node type="allow" cidr="67.XXX.XXX.XXX/30"/> etc... </list> then I went into the $FSHOME/conf/sip_profiles/internal.xml and did the following: <param name="apply-inbound-acl" value="DIDProviders"/> but I still keep seeing calls from other IPs that are not in the "DIDProviders" list getting through. What else do I need to do to prevent this? Should this not be in internal.xml but in external.xml? TIA \RR