杀毒软件：apt-cache search antivirus|sort|less
找了一条贴出来：
amavisd-new - Interface between MTA and virus scanner/content filters
avscan - GTK frontend for the Clam AntiVirus scanner (ClamAV)
clamav - antivirus scanner for Unix
klamav - KDE frontend for ClamAV
防火墙：apt-cache search firewall|sort|less
arno-iptables-firewall - Single- and multi-homed firewall script with DSL/ADSL support
fiaif - An easy to use, yet complex firewall
filtergen - packet filter generator for various firewall systems
firehol - An easy to use but powerful iptables stateful firewall
firestarter - gtk program for managing and observing your firewall
fwbuilder-linux - Firewall Builder policy compiler(s) for Linux based firewalls
ipkungfu - iptables-based Linux firewall
kmyfirewall - iptables based firewall configuration tool for KDE
zorp - An advanced protocol analyzing firewall
其实很多防火墙都是基于iptables的。
推荐clamav、avscan、iptables
