Subj : Connection Refused
To   : Thom LaCosta
From : Android8675
Date : Mon Feb 27 2023 11:21 am

  Re: Connection Refused
  By: Thom LaCosta to All on Mon Feb 27 2023 06:44 am

 > Fresh install of current version of Synchronet.  While I can connect with no problems to it when using an
 > internal IP address, I can not connect if III use the external address presented by the router.
Your router should have an option for "Port Forwarding", so if you "telnet" to your external IP you need to make sure your router routes any requests for Port 23 (telnet://yourip) to the correct computer on your network.

If you're using SSH, that uses port 22 by default,. Rlogin is 513. The ports are listed. You should only open what you need and best to configure sbbs to listen for telnet on a non-normal port.

 > I have added
 > synchronet to the firewall rules, opened port 23 and even attempted to connect with the firewall disabled.
 > Other "remote" operatuions, such as Teamviewer and Remote Utilities work with no problems

Your firewall just blocks stuff that gets to your computer. Your internet traffic is getting blocked by your router, and as stated, teamviewer uses an external server to route traffic past your router, and is insecure as "eff". Seriously, delete that shit.

Good tool for checking to make sure your local network has the right ports open (and none you don't want open) is http://nmap.org, but this won't help you get traffic from outside your network.

What DM suggested using "scanmyports.ssjs" from your BBS system is what you want to do.

Also keep in mind sometimes ISPs just block Ports because it's easier than dealing with rampent compromised systems and unprotected smtp relaying.

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