The /localinfo -p command works by creating a UPnP port 113, if it does not already exist, getting your external IP address from that UPnP entry on your router and then removing that port, if it is not in use by your identd server. If the router is blocking port 113, this will prevent mIRC from doing this. Unfortunately there is no way for mIRC to know which ports your router blocks. It is probable that the router blocks a number of standard incoming ports, most likely for security. One solution would be for /localinfo -p to use a random port outside the first 1056 services port range. This change will be in the next version.
