Groups > comp.os.linux.networking > #4649

Re: ftp,ssh,http blocked by ISP?

From	"Carlos E.R." <robin_listas@es.invalid>
Newsgroups	comp.os.linux.networking
Subject	Re: ftp,ssh,http blocked by ISP?
Date	2020-07-19 12:59 +0200
Message-ID	<lkldug-4mr.ln1@Telcontar.valinor> (permalink)
References	(2 earlier) <revd45$fc$1@dont-email.me> <revfg9$h8d$1@dont-email.me> <revh7v$qem$1@dont-email.me> <revs5j$td2$2@dont-email.me> <rf08ac$j70$1@dont-email.me>

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On 19/07/2020 03.40, Bob Tennent wrote:
> On Sat, 18 Jul 2020 22:13:07 -0000 (UTC), William Unruh wrote:
>   >>
>   >> OK, done.  But man nmap is completely incomprehensible to me.  I know
>   >> pings are blocked so I need -Pn.  When I do nmap -Pn myhost I get
>   >>
>   >> 998 filtered ports
>   >> 22/tcp closed
>   >> 50001 open
>   >>
>   >> I could move my ftp and http stuff to the cloud computer.
>   >> That leaves ssh as the only essential service. If assume 22
>   >> and 22xx are blocked, could I use 50001 as my ssh port?
> 
>   > You can use any number you want as your ssh port (of
>   > course if it is the number of some crucial service then
>   > that could cause trouble) Then on your router port
>   > forward that port to the computer/port you actually want
>   > to use.
> 
> I know how to port-forward, use non-standard ports,
> configure sshd, etc. My question is: if nmap says 50001 is
> "open", can I use that as a non-standard port for ssh
> without being blocked by my ISP?

No. nmap is telling you that something is using and responding already 
on port 50001

> And I don't know what "998
> filtered ports" means. And can nmap confirm that ftp and
> http and even a non-standard port like 22xx for ssh are
> blocked?

Weird, but your ISP might be examining traffic and blocking ports /he/ 
knows /you/ use.

-- 
Cheers, Carlos.

Thread

ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-18 12:38 +0000
  Re: ftp,ssh,http blocked by ISP? Dan Purgert <dan@djph.net> - 2020-07-18 14:59 +0000
    Re: ftp,ssh,http blocked by ISP? William Unruh <unruh@invalid.ca> - 2020-07-18 15:15 +0000
      Re: ftp,ssh,http blocked by ISP? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2020-07-18 20:01 +0300
        Re: ftp,ssh,http blocked by ISP? William Unruh <unruh@invalid.ca> - 2020-07-18 22:06 +0000
    Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-18 16:35 +0000
  Re: ftp,ssh,http blocked by ISP? Ken Hart <kwhart1@frontier.com> - 2020-07-18 11:12 -0400
    Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-18 16:44 +0000
  Re: ftp,ssh,http blocked by ISP? John McCue <jmccue@jmclin1.hsd1.ma.comcast.net> - 2020-07-18 16:33 +0000
  Re: ftp,ssh,http blocked by ISP? Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2020-07-18 13:26 -0400
    Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-18 17:56 +0000
      Re: ftp,ssh,http blocked by ISP? Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2020-07-18 14:36 -0400
        Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-18 19:06 +0000
          Re: ftp,ssh,http blocked by ISP? William Unruh <unruh@invalid.ca> - 2020-07-18 22:13 +0000
            Re: ftp,ssh,http blocked by ISP? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-07-18 19:36 -0400
              Re: ftp,ssh,http blocked by ISP? "Carlos E.R." <robin_listas@es.invalid> - 2020-07-19 12:56 +0200
                Re: ftp,ssh,http blocked by ISP? Johann Beretta <beretta@nun-ya-bizness.com> - 2020-07-28 21:26 -0700
                Re: ftp,ssh,http blocked by ISP? "Carlos E.R." <robin_listas@es.invalid> - 2020-07-29 10:40 +0200
                Re: ftp,ssh,http blocked by ISP? Johann Beretta <beretta@nun-ya-bizness.com> - 2020-08-01 21:22 -0700
                Re: ftp,ssh,http blocked by ISP? "Carlos E.R." <robin_listas@es.invalid> - 2020-08-02 13:16 +0200
                Re: ftp,ssh,http blocked by ISP? Johann Beretta <beretta@nun-ya-bizness.com> - 2020-08-03 13:57 -0700
                Re: ftp,ssh,http blocked by ISP? "Carlos E.R." <robin_listas@es.invalid> - 2020-08-03 23:07 +0200
            Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-19 01:40 +0000
              Re: ftp,ssh,http blocked by ISP? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-07-18 22:10 -0400
              Re: ftp,ssh,http blocked by ISP? "Carlos E.R." <robin_listas@es.invalid> - 2020-07-19 12:59 +0200
  Re: ftp,ssh,http blocked by ISP? Giovanni <lsodgf0@home.net.it> - 2020-07-19 10:10 +0200
  Re: ftp,ssh,http blocked by ISP? Marc Haber <mh+usenetspam1118@zugschl.us> - 2020-07-19 15:09 +0200
    Re: ftp,ssh,http blocked by ISP? William Unruh <unruh@invalid.ca> - 2020-07-19 17:35 +0000
      Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-20 02:33 +0000
        Re: ftp,ssh,http blocked by ISP? William Unruh <unruh@invalid.ca> - 2020-07-20 02:55 +0000
        Re: ftp,ssh,http blocked by ISP? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-07-19 23:32 -0400
        Re: ftp,ssh,http blocked by ISP? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-07-19 23:46 -0400
          Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-20 06:01 +0000
            Re: ftp,ssh,http blocked by ISP? "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2020-07-20 20:16 -0400
            Re: ftp,ssh,http blocked by ISP? Johann Beretta <beretta@nun-ya-bizness.com> - 2020-08-01 21:24 -0700
        Re: ftp,ssh,http blocked by ISP? Giovanni <lsodgf0@home.net.it> - 2020-07-20 09:10 +0200
          Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-20 11:31 +0000
            Re: ftp,ssh,http blocked by ISP? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2020-07-20 17:49 +0300
              Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-20 15:32 +0000
                Re: ftp,ssh,http blocked by ISP? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2020-07-20 21:01 +0300
                Re: ftp,ssh,http blocked by ISP? Bit Twister <BitTwister@mouse-potato.com> - 2020-07-20 13:04 -0500
            Re: ftp,ssh,http blocked by ISP? William Unruh <unruh@invalid.ca> - 2020-07-20 20:11 +0000
              Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-20 20:42 +0000
                Re: ftp,ssh,http blocked by ISP? William Unruh <unruh@invalid.ca> - 2020-07-20 21:11 +0000
                Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-21 01:52 +0000
                Re: ftp,ssh,http blocked by ISP? dyrmak <dyrmak@quelite.terre.invalid> - 2020-07-21 08:35 +0000
  Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-21 10:34 +0000
    Re: ftp,ssh,http blocked by ISP? Giovanni <lsodgf0@home.net.it> - 2020-07-21 13:48 +0200
      Re: ftp,ssh,http blocked by ISP? Bob Tennent <rdtennent@tennent.ca> - 2020-07-21 13:35 +0000
        Re: ftp,ssh,http blocked by ISP? "Carlos E.R." <robin_listas@es.invalid> - 2020-07-21 16:03 +0200

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