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Groups > comp.os.linux.networking > #4972
| From | Lew Pitcher <lew.pitcher@digitalfreehold.ca> |
|---|---|
| Newsgroups | comp.os.linux.networking |
| Subject | Re: incoming ssh blocked by ISP |
| Date | 2021-11-06 16:28 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <sm6af0$sst$1@dont-email.me> (permalink) |
| References | <sm66vk$hvp$1@dont-email.me> |
On Sat, 06 Nov 2021 15:28:52 +0000, Bob Tennent wrote: > Outgoing ssh works fine and sshd is active. It's not my > firewall and I use ddclient and zoneedit.com to deal with my > dynamic IP address. > > When I complain to Support at my ISP I'm told to pay for a > static IP address. Is there any other solution? ISPs sell "internet connectivity" to clients, and most consumer- grade ISPs block datagrams coming from the internet to certain well-known ports, often either because they "represent a security exposure" to the client, or because the ISP would like to gain an additional income from "power users" by up-selling them on internet connectivity that they do not deliberately block. It sounds like your ISP falls into that second category. Outside of capitulating to the ISP's up-selling requirement, or changing your ISP to one that does not block incoming SSH, the only reliable way I can think of to bypass your ISP's block is to change the port on which you listen for SSH connections. While TCP and UDP port 22 are officially used for incoming SSH connections, you /can/, through your ssh server's configuration, change that port to any other value. If you choose a port number that your ISP does /not/ block, then your SSH server will accept incoming connections. Of course, this means that you must instruct your outside SSH client to use that port as well. For the OpenSSH ssh server daemon, you would specify the new port as part of the sshd_config(5) "ListenAddress" directive or specify the "-p <portnumber>" option to in the sshd(1) command. For the OpenSSH ssh client program, you would specify the same port in the "-p <portnumber>" option of the ssh(1) command. > I'm not a > networking expert. I do have login access to a server with a > static IP address but it's not the system I'm trying to ssh > into. HTH -- Lew Pitcher "In Skills, We Trust"
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incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-06 15:28 +0000
Re: incoming ssh blocked by ISP Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2021-11-06 16:28 +0000
Re: incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-06 21:33 +0000
Re: incoming ssh blocked by ISP Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2021-11-06 21:54 +0000
Re: incoming ssh blocked by ISP "Carlos E. R." <robin_listas@es.invalid> - 2021-11-06 23:13 +0100
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-06 19:16 -0400
Re: incoming ssh blocked by ISP "Carlos E. R." <robin_listas@es.invalid> - 2021-11-07 00:28 +0100
Re: incoming ssh blocked by ISP William Unruh <unruh@invalid.ca> - 2021-11-07 03:03 +0000
Re: incoming ssh blocked by ISP Marco Moock <invalid@invalid.invalid> - 2021-11-07 12:44 +0100
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-06 17:57 -0400
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-06 18:01 -0400
Re: incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-07 01:56 +0000
Re: incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-07 21:21 +0000
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-07 19:05 -0500
Re: incoming ssh blocked by ISP ant@zimage.comANT (Ant) - 2021-11-07 22:51 -0600
Re: incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-08 01:18 +0000
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-07 21:25 -0500
Re: incoming ssh blocked by ISP Bit Twister <BitTwister@mouse-potato.com> - 2021-11-07 23:35 -0600
Re: incoming ssh blocked by ISP William Unruh <unruh@invalid.ca> - 2021-11-07 02:51 +0000
Re: incoming ssh blocked by ISP "Carlos E. R." <robin_listas@es.invalid> - 2021-11-06 22:47 +0100
Re: incoming ssh blocked by ISP Dan Purgert <dan@djph.net> - 2021-11-10 13:13 +0000
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-06 13:43 -0400
Re: incoming ssh blocked by ISP Pascal Hambourg <pascal@plouf.fr.eu.org> - 2021-11-06 19:18 +0100
Re: incoming ssh blocked by ISP Marco Moock <invalid@invalid.invalid> - 2021-11-06 19:35 +0100
Re: incoming ssh blocked by ISP William Unruh <unruh@invalid.ca> - 2021-11-06 19:54 +0000
Re: incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-06 21:18 +0000
Re: incoming ssh blocked by ISP "Carlos E. R." <robin_listas@es.invalid> - 2021-11-06 22:47 +0100
Re: incoming ssh blocked by ISP "Carlos E. R." <robin_listas@es.invalid> - 2021-11-06 23:56 +0100
Re: incoming ssh blocked by ISP Pascal Hambourg <pascal@plouf.fr.eu.org> - 2021-11-06 23:44 +0100
Re: incoming ssh blocked by ISP "Carlos E. R." <robin_listas@es.invalid> - 2021-11-06 23:54 +0100
Re: incoming ssh blocked by ISP Pascal Hambourg <pascal@plouf.fr.eu.org> - 2021-11-07 10:07 +0100
Re: incoming ssh blocked by ISP Marco Moock <invalid@invalid.invalid> - 2021-11-07 10:22 +0100
Re: incoming ssh blocked by ISP Pascal Hambourg <pascal@plouf.fr.eu.org> - 2021-11-07 10:51 +0100
Re: incoming ssh blocked by ISP Marco Moock <invalid@invalid.invalid> - 2021-11-07 11:09 +0100
Re: incoming ssh blocked by ISP Joe Beanfish <joebeanfish@nospam.duh> - 2021-11-08 14:52 +0000
Re: incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-14 16:42 +0000
Re: incoming ssh blocked by ISP Marco Moock <mo01@posteo.de> - 2021-11-14 18:01 +0100
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-14 13:08 -0500
Re: incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-14 19:20 +0000
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-14 15:06 -0500
Re: incoming ssh blocked by ISP Bob Tennent <rdtennent@tennent.ca> - 2021-11-14 21:03 +0000
Re: incoming ssh blocked by ISP "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2021-11-14 16:28 -0500
Re: incoming ssh blocked by ISP ant@zimage.comANT (Ant) - 2021-11-15 04:19 -0600
Re: incoming ssh blocked by ISP William Unruh <unruh@invalid.ca> - 2021-11-15 20:18 +0000
Re: incoming ssh blocked by ISP ant@zimage.comANT (Ant) - 2021-11-15 04:18 -0600
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