Re: can't connect to server from outside LAN

From	Monte Milanuk <memilanuk@hushmail.com>
Newsgroups	linux.debian.user
Subject	Re: can't connect to server from outside LAN
Date	2024-06-14 04:10 +0200
Message-ID	<IP4y5-2MIu-1@gated-at.bofh.it> (permalink)
References	<IOF6F-2tDI-1@gated-at.bofh.it> <IOWqR-2HFS-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 6/13/2024 10:26, Darac Marjal wrote:
>
> On 12/06/2024 23:54, Greg Marks wrote:
>> The problem began a couple weeks ago; previously (and for many years)
>> I had been able to ssh to my server without issue.  The first time it
>> failed, I was using free wireless at an airport; I was able to ssh to my
>> server from the hotel that morning, and maybe, the first time I tried,
>> from the airport, but then subsequent ssh attempts from the airport
>> failed to connect.  I mention this only because nothing had changed in
>> my server's configuration when this problem began.
>>
>> This is a real problem for me, as a lot of my work involves sending
>> files via scp between work and home.  Any suggestions about how to
>> troubleshoot and hopefully fix the problem will be greatly appreciated.
>
> Have you contacted your ISP? It's possible they're blocking SSH access 
> on (questionable) security grounds.
>
> As a workaround, you could look at 
> https://packages.debian.org/bookworm/sslh, which allows you to 
> "multiplex" HTTPS, SSH and various other protocols all on the same 
> port (the idea being that you can do "ssh -p 443 gmarks.org" as well 
> as browsing to https://gmarks.org:443).

It might be worth trying something like Tailscale... with a free 
personal account, you can set it up on your home server, and if your 
work allows, on there as well.  It'll establish essentially a private 
vpn between the devices, without having to mess with any kind of port 
forwarding on your router, and bypassing any shenanigans on the part of 
your ISP.  Tailscale also has some 'fancier' SSH options, if you need 
them, but just establishing a 'direct' connection between the hosts 
without any other crap in between helps simplify things a lot.

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can't connect to server from outside LAN Greg Marks <gtmarks@gmail.com> - 2024-06-13 01:00 +0200
  Re: can't connect to server from outside LAN David Christensen <dpchrist@holgerdanske.com> - 2024-06-13 01:40 +0200
  Re: can't connect to server from outside LAN Tim Woodall <debianuser@woodall.me.uk> - 2024-06-13 02:30 +0200
  Re: can't connect to server from outside LAN Jeffrey Walton <noloader@gmail.com> - 2024-06-13 10:20 +0200
  Re: can't connect to server from outside LAN Monte Milanuk <memilanuk@hushmail.com> - 2024-06-14 04:10 +0200

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