Some tricky tips for linux iptables

Hi.baidu.com/p3rlish

Iptables rules are often gray and hateful for penetration. Disable specific ports, forward and reverse links, and some IP links. Some may say that iptables-F is not enough. But after the restart, you can't always use iptables-F once.
There are still some tricky ways to bypass the Administrator's evil rules.
Iptables has two parameters that can help us bypass these evil rules.
Iptables-save and iptables-restore

The iptable-save parameter backs up the current iptables rule to a certain location.
Iptables-save> xxx.txt

The iptables-restore parameter imports the backed up iptables rules.
Iptables-restore <xxx.txt

In this way, we have some tricky ideas, such as modifying some strategies. We can first iptables-save> xxx.txt, then modify the number of the IP segment in which the Administrator ban it, And then iptables-restore <xxx.txt. After modification, remember to touch it, the Administrator may not find that the creation time is different from the original time.

It is purely a tricky stream technique and is not worth promoting ......