proxy-packet filter

["Prasanna.H.S" <prassi () bgl vsnl net in>]

hi ,
     I currently designing a firewall in Linux.Is it necessary for me to
have both proxy as well as packet filter .Can y proxy do the job of packet
filtering as well...Also I want to know bout the step wise procedure of
designing a dual homed gateway for my Firewall.


Thanx
Rgds
Prasanna.H.S