Troubleshooting Linux FirewallsWhen something goes wrong with your Linux firewall, you need to fix it-right now. You don't have time for endless newsgroup searches, confusing man pages, emails to the developers...it's an emergency! One book brings together all the step-by-step solutions and proven problem-solving techniques you'll need when the time comes: Troubleshooting Linux Firewalls. |
Common terms and phrases
ACCEPT IPTABLES allow assets bytes chain chapter chroot client configuration connection tracking default destination DHCP DNAT DNS server dport 80 DROP IPTABLES ebtables ESTABLISHED eth0 eth1 eth2 example external interface firewall rules FORWARD i EXTERNAL FORWARD p tcp host Host-B ICMP INPUT p tcp internal network Internet IP address IP Forwarding ipchains IPSEC IPTABLES A FORWARD IPTABLES A INPUT IPTABLES A OUTPUT IPTABLES t nat kernel Layer limit 1/second Linux Linux kernel LOG log-level info log-ip-options log-prefix MAC address modprobe module nat A PREROUTING netfilter netfilter/iptables nmap openswan options OSI model outbound patch ping port POSTROUTING PPTP problem prot opt protocol proxy server Redhat REDIRECT RELATED j ACCEPT risk management route ruleset running scan SELinux SMTP sniffer switch tcp m tcp TCP wrappers tcpdump to-destination traceroute traffic users web server