Re: unroutable protocol through pix

akin_lopez · ‎03-27-2006

Hi people,

is it possible to send unroutable protocol traffic through pix?

i mean application that does broadcast to detect server.

thanks.

aashish.c · ‎03-27-2006

Yes, it is very much possible. for example, if IP phones are inside and CCM is on outside. as soon as IP phones boots it sends a DHCP request to get an IP with source IP as 0.0.0.0 and dest as 255.255.255.255.

regards

aashish C

akin_lopez · ‎03-28-2006

How do you enable that through the PIX firewall?

aashish.c · ‎03-28-2006

we need to put option :

dhcpd option code

see this :

http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_sw/v_63/cmdref/df.htm#wp1025497

i believe it works when u make pix inside interface as DHCP server for your clients. but u can cehck.

regards

aashish C