Hi Jiri! We have a similar problem that you described with UDP bind through a Cisco PIX501 firewall. We are using port 5080 and the replies “Resource temporarily unavailable”. Did you ever get an answer to your problem? I really appreciate if you can answer me soon! regards Anders Anders Wikström Si ATM AB Hamngatan 27 172 66 Sundbyberg +46 (0)8 982300 Mobile +46 (0)70 5682281 _______________________________________________ Serusers mailing list serusers(a)lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers