Re: Is this happening to you?

I THINK I have an answer.

The Norton anti-virus that was free with our Comcast provider expired and Xfinity replaced it with software that runs on my router/gateway. It's called Xfinity Advanced Security.
It will not allow use of ftp. Supposedly you can temporarily allow use of certain ports but I can't get it to work. I think I have to figure out how to disable it and buy Norton again.

I will update when I resolve, if anyone else has this issue.

Best Regards,

Thomas Garvey

On 3/5/2021 10:24 AM, Scott Klement wrote:

Thomas,

That error ("A remote host refused a connect...") means that the computer sent back a response saying that no application is waiting for connections on the port you've selected.

This could mean:

1) The connection is not going to the computer you think it should.  Perhaps you are connecting to a different one?

2) A firewall is responding in lieu of the computer, and saying you can't connect.  This is unlikely, because typically a firewall will simply discard your connection attempt rather than responding with a refusal message.  (This avoids problems with ICMP flood attacks) but its possible.

3) The computer is responding normally, but the application (SMTP or FTP or whatever is returning this message) is not running.  Or is running on another port.

-SK


On 3/5/2021 9:32 AM, Thomas Garvey wrote:

Suddenly, I can't use ftp from my PC to any of our servers.
I get a 425 (not able to open data connection).
I am remotely connected via VPN to our corporate network.
But a co-worker, who is similarly remotely connected, can use ftp to our servers without problems.

Nothing has changed on our servers (except a cache battery replacement on one of them).
Nothing I know of has happened to my Windows 10 PC.
The only thing I can think of is that the Norton Anti-virus product on my PC (it came free with our internet provider),
has been replaced with something that supposedly provides the same protection through my router.

Further, we have applications that use Scott Klement's SMTPR4 code and they all fail when they try to send email through our servers as well.
Here's that error...
ERROR: connect(): A remote host refused an attempted connect operation.
connect(): A remote host refused an attempted connect operation.

Why would requests from my PC to the server be rejected or fail, but the same requests from another PC in another location work fine?
I've tried using the passive mode to no avail.