Here are different methods to check if an IP address is blocked in Config Server Firewall (CSF).
- Check if an IP is blocked in CSF from the WHM
WHM > Config Server Firewall > Search for IP

2. Check if an IP is blocked in CSF from the terminal:
csf -g IP-ADDRESS
3. Check if an IP is blocked in CSF from the lfd.log
grep 'IP-ADDRESS' /var/log/lfd.log

![WARNING: [pool user_USERNAME] server reached pm.max_children setting (25), consider raising it Screen Shot 2020 06 23 at 09.57.51 - WARNING: [pool user_USERNAME] server reached pm.max_children setting (25), consider raising it](https://i0.wp.com/administrator.pejcic.rs/wp-content/uploads/2026/09/Screen-Shot-2020-06-23-at-09.57.51.png?resize=344%2C194&ssl=1)

![node[175421]: pthread_create: Resource temporarily unavailable 2023 08 28 12 15 - node[175421]: pthread_create: Resource temporarily unavailable](https://i0.wp.com/administrator.pejcic.rs/wp-content/uploads/2023/08/2023-08-28_12-15.png?resize=344%2C194&ssl=1)