There is no simple fix for this infamous listening port blocked issue, but you can try this.

If you are TM user, go to http://192.168.1.1/login.html , login with your admin credential. The guest account username: tmuser , password: tmuser, but they are useless.

With your admin account, look for IGMP and check it to turn it on.

Restart Bitcomet.

TM will cap your speed once they detected your torrent traffics. Thus use a HTTPS proxy instead, http://spys.ru/en/https-ssl-proxy

Keep trying each proxy until it works, currently the France proxy works for me: 91.229.20.73, port: 80

In Bitcomet, set the proxy in Tools -> Options... -> Proxy(under Connection)

I once used a Thailand proxy and always gave me 250++kB/s speed vs 1 or 2 kB/s by stupid TM Net speed cap.

But it is gone. So am using the France proxy, still can give me average 100++kB/s speed, 200+ kB/s top.