[asterisk-biz] How to Allow peer from multuple IP

[Dome Charoenyost]

Hi All,
Is posible to use permit, deny  in sip.conf to allow peer ?
example if my client need to send traffic from multiple host they ask
me to allow 1 Class C IP
like a  203.1.1.0/255.255.255.0   i try to use deny and permit in
sip.conf but don't work.

Best Regards.

Dome C.