To remove a firewall rule blocking incoming SSH connections from external IP addresses, access your server's firewall settings and locate the rule that specifically denies SSH traffic on port 22 from "any" source, then delete or disable that rule; the exact steps depend on your firewall software (e.g., UFW on Linux, Windows Firewall) but generally involve navigating to inbound rules and removing the blocking SSH entry. 
Key points to remember:

    Identify the firewall tool:
    Find out which firewall software your server uses (e.g., UFW, iptables, Windows Firewall). 

Access firewall settings:
Log into your server and use the appropriate command or interface to access the firewall configuration. 
Find the SSH rule:
Look for the rule that blocks incoming traffic on TCP port 22, which is the standard SSH port. 
Delete or disable the rule:
Depending on your firewall, you can either completely remove the rule or simply change its action from "deny" to "allow". 

Example with UFW on Linux:

    Check current rules: sudo ufw status 

Remove the blocking rule: sudo ufw delete rule <rule-number> (replace <rule-number> with the number of the SSH blocking rule) 

Important considerations:

    Security implications:
    Before removing a firewall rule, ensure you understand the potential security risks involved and have alternative security measures in place if necessary. 

Specific IP addresses:
If you want to allow SSH access only from specific IP addresses, consider creating a new firewall rule that explicitly permits connections from those addresses instead of completely removing the blocking rule.