Hi,
I tried task for IPtables Installation And Configuration and failed it.
“Rule was not added permanently on App server 1”
Following are the steps that i did.
Installing Iptables
yum install iptables-services
systemctl start iptables
systemctl enable iptables
ADDED BELOW line to Iptables
iptables -I INPUT ! --src 172.16.238.14 -m tcp -p tcp --dport 5000 -j DROP
Removed one rule from both app02 and app03 since it was blocking all protocols
iptables -D INPUT 5
Saved using
service iptables save
Below are the screen shorts
APP01
I was able to ping app server from loadbalancer server by using
What did i do wrong?
try this iptables rules, its worked for me
sudo iptables -R 5 INPUT -p tcp --destination-port (in question) -s 172.16.238.14 -j ACCEPT
sudo iptables -A INPUT -p tcp --destination-port (in question) -j DROP
Thanks for the relpy . I will try next time.
But just curious why mine failed @mmumshad
Can you tell me why you used ! argument?
From iptables man
** A “!” argument before the address specification inverts the sense of the address.**
iptables -I INPUT ! --src 172.16.238.14 -m tcp -p tcp --dport 5000 -j DROP
So its more like if src not equal to 172.16.238.14 then drop it.
For tutorial/solution - https://youtu.be/oW2UTb-Nfx0
This video is made by me with sole intention of helping the community
For Tutorial/Solution - Content made for sole reason to help the community.
