In the Linuxp system, the itables command can perform remote backup or recovery for us, but many users may not be familiar with it yet. The editor will share the method with you below.

Here's how:

1. Configuration file location of iptables: /etc/sysconfig/iptables

Main control machine: the machine that is running the business; backup machine: when the main control machine fails, it switches to the backup machine

--Operation on the main control computer------------------

2. Create a directory:

mkdir -p /bak/iptables/

mkdir /root/script/

3. Create a script in the /root/script/ directory:

vi backup.sh

cp /etc/sysconfig/iptables /bak/iptables/iptables_$(date +%Y%m%d%H)

4. Customize automatic tasks:

crontab -e

*/10 * * * * /usr/sbin/ntpdate 210.72.145.44

10 * * * * sh /root/script/backup.sh

--Operate on the backup machine---------------------

5. Create a directory:

mkdir -p /bak/iptables/{lt,yd} #The lt directory stores the backup of China Unicom jump, and the yd directory stores the backup of mobile jump.

mkdir /root/script/

6. Create a script in the /root/script/ directory:

vi scp_lt.sh

#!/usr/bin/expect -f

set password gst

spawn scp -P 22 root@202.105.135.52:/etc/sysconfig/iptables /bak/iptables/lt/iptables

set timeout 300

expect "root@202.105.135.52's password:"

set timeout 300

send "$passwordr"

set timeout 300

send "exitr"

expect eof

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