Blocking bad ports

Comodo Internet Security - CIS Firewall Help - CIS
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The following is not contained in an article but is common knowledge among security professionals that ALL malware that uses SMB (starting with the Blaster worm in 2000) can be blocked using a firewall. Initially Blaster was stopped by blocking TCP ports 139 and 445. We have been blocking those ports permanently since that time.

Additionally, for WannaCry, you should block TCP port 137 and UDP ports 137 and 138.

So my question is how do i block these in comodo firewall??

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Depending on what configuration you use and if you trusted any networks or defined network zones as ‘Home’ or ‘Work’ it may already be blocked but you can use this Hide PC Ports Using Stealth Ports Wizard | Internet Security Help