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2013 Jan 04
4
CentOS 6.3 as Firewall/Router
...rp #echo "1" > /proc/sys/net/ipv4/ip_dynaddr # 4. rules set up. # 4.1 Filter table # 4.1.1 Set policies /sbin/iptables -P INPUT DROP /sbin/iptables -P OUTPUT DROP /sbin/iptables -P FORWARD DROP # 4.1.2 Create userspecified chains # Create chain for bad tcp packets /sbin/iptables -N bad_tcp_packets # Create separate chains for ICMP, TCP and UDP to traverse /sbin/iptables -N allowed /sbin/iptables -N tcp_packets /sbin/iptables -N udpincoming_packets /sbin/iptables -N icmp_packets # 4.1.3 Create content in userspecified chains # bad_tcp_packets chain /sbin/iptables -A bad_tcp_packets -p tc...