How to unblock ip from SSH in ubuntu? connection refused?

https://seanelvidge.com/unblock-ip-address-from-connecting-via-ssh/

sudo iptables -L --line-numbers

sudo iptables -D f2b-sshd 2

(number 2 means the second item under f2b-sshd, change it accordingly)

sudo iptables-save

---

Check banned IPs in a jail
sudo fail2ban-client status sshd

Status for the jail: sshd

|- Filter

|  `- Currently failed: 2

|- Actions

|  `- Currently banned: 1

|     `- 192.168.0.100

To unban an IP (e.g., 192.168.0.100) from the sshd jail:

sudo fail2ban-client set sshd unbanip 192.168.0.100