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Update cheatsheets

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ivuorinen
2025-03-14 00:18:08 +00:00
parent 904f7fe0c1
commit 605e1cdfd8
20 changed files with 97 additions and 68 deletions
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tldr/linux/iptables
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@@ -11,24 +11,24 @@ source: https://github.com/tldr-pages/tldr.git
- View chains, rules, packet/byte counters and line numbers for the filter table:
`sudo iptables --verbose --numeric --list --line-numbers`
`sudo iptables {{[-vnL --line-numbers|--verbose --numeric --list --line-numbers]}}`
- Set chain [P]olicy rule:
- Set chain policy rule:
`sudo iptables --policy {{chain}} {{rule}}`
`sudo iptables {{[-P|--policy]}} {{chain}} {{rule}}`
- [A]ppend rule to chain policy for IP:
- Append rule to chain policy for IP:
`sudo iptables --append {{chain}} --source {{ip}} --jump {{rule}}`
`sudo iptables {{[-A|--append]}} {{chain}} {{[-s|--source]}} {{ip}} {{[-j|--jump]}} {{rule}}`
- [A]ppend rule to chain policy for IP considering [p]rotocol and port:
- Append rule to chain policy for IP considering protocol and port:
`sudo iptables --append {{chain}} --source {{ip}} --protocol {{tcp|udp|icmp|...}} --dport {{port}} --jump {{rule}}`
`sudo iptables {{[-A|--append]}} {{chain}} {{[-s|--source]}} {{ip}} {{[-p|--protocol]}} {{tcp|udp|icmp|...}} --dport {{port}} {{[-j|--jump]}} {{rule}}`
- Add a NAT rule to translate all traffic from the `192.168.0.0/24` subnet to the host's public IP:
`sudo iptables --table {{nat}} --append {{POSTROUTING}} --source {{192.168.0.0/24}} --jump {{MASQUERADE}}`
`sudo iptables {{[-t|--table]}} {{nat}} {{[-A|--append]}} {{POSTROUTING}} {{[-s|--source]}} {{192.168.0.0/24}} {{[-j|--jump]}} {{MASQUERADE}}`
- [D]elete chain rule:
- Delete chain rule:
`sudo iptables --delete {{chain}} {{rule_line_number}}`
`sudo iptables {{[-D|--delete]}} {{chain}} {{rule_line_number}}`