( /SECURITY/firewallbyhand.txt )
Firewall squid NAT RedHat 8++ ipchains. Redhat 7.0 -. IPFWADM, redhat 6.2 sendmail accounting Sentry Port Scan Detector 0.60 * firewall * IPFWADM named , firewall - LRP TCPwrapper: hosts.deny IPFilter , ssh1 & ssh2 , :