iptables [-t TABLE] [-COMMAND CHAIN] [RULE]

Tables and chains:

• filter (default table if -t option is not specified)
  • INPUT
  • FORWARD
  • OUTPUT
• nat
  • PREROUTING
  • OUTPUT
  • POSTROUTING
• mangle
  • PREROUTING
  • OUTPUT
  • INPUT
  • FORWARD
  • POSTROUTING
• raw
  • PREROUTING
  • OUTPUT

Command:

• -A: append
• -D: delete
• -I
• -R
• -L: list
• -F
• -Z
• -N
• -X
• -P
• -E

Rule specification(used in -A, -D, -I, -R):

• -p, –protocol [!] protocol
• -s, –source [!] address[/mask]
• -d, –destination [!] address[/mask]
• -j, –jump target
• -g, –goto chain
• -i, –in-interface [!] name
• -o, –out-interface [!] name
• -c, –set-counters PKTS BYTES
• -v, –verbose
• -n, –numeric
• -x, –exact
• –line-numbers
• –modprobe=command

Target: