Re: Is this happening to you?

[Scott Klement <midrange-l@xxxxxxxxxxxxxxxx>]

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.