Hi all, I am new to this forum. Today, i download ser package, then i install in my fedora core 4. Everything is ok. Next, i start ser and use serctl add to add account to ser server. Then i use sjphone to connect to ser server. Sjphone try to send REGISTER to ser server. I use ethereal to get the package. I see that ser server responds ICMP host unreacheable all the time. So, REGISTER is failed. Can you give me some suggestion? Thank you for that.