I updated Comodo to the latest version (3.8.65951.477), and now it ALWAYS blocks WinSCP from working.
WinSCP had already existed in a Network Security Policy as a Trusted Application, and worked in the past. After this update, all FTP connections using it fail. I deleted the policy and re-added it, but no go.
If I kill Comodo, WinSCP is still blocked - this is another issue that really should be fixed - Comodo rules still appear to be in place even when you kill Comodo, which is just WRONG.
In any case, I have to set the Firewall to Disabled, and THEN WinSCP can once again connect.
Thanks for the suggestions. My question about why the firewall rules are still in place when I exit Comodo has been answered elsewhere. Now it’s just a question of why it blocks WinSCP FTP connections for me.
I didn’t run the Stealth port wizard, I don’t think. I’ll check my global rules.