[Serusers] phones both in a LAN cannot get through when ser is on Internet

[gg]

Hi everyone ! 
   I have installed ser-0.8.10 and ser-mysql-0.8.10 on Red Hat Linux 7.2. After I 
configured the script (even did not add anything). The SIP server can worked well in LAN .
there are Two telephones both in the LAN can get though. But when I put ser on Internet 
and the two phones still in a LAN which links to Internet, they cann't get through. 
   I have no idea what I can do .
   anyone help me please! 
   Thank you!		

　　　　　　　　gg
　　　　　　　　gdut200104024532 at 163.com
　　　　　　　　　　2004-08-20