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Why can't I ssh from wifi device to wifi device? [fixed]
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RayDude
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PostPosted: Fri Mar 20, 2020 2:48 pm    Post subject: Why can't I ssh from wifi device to wifi device? [fixed] Reply with quote

When I attempt to ssh from one wifi attached laptop to another, ssh prompts for a password and then hangs.

I found an old thread online that describes a problem with router software, but I find it hard to believe that my ASUS router would have a bug like that 13 years later.

Has anyone ever come across something like this before?
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Last edited by RayDude on Fri Mar 20, 2020 11:41 pm; edited 1 time in total
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joanandk
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PostPosted: Fri Mar 20, 2020 5:03 pm    Post subject: Re: Why can't I ssh from wifi device to wifi device? Reply with quote

RayDude wrote:
Has anyone ever come across something like this before?

Things to check:
a) Does SSH from either machines work on a wired system?
b) let tcpdump run on the other machine while trying to ssh to it.
c) check if the router has wlan isolation enabled.

BR
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RayDude
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PostPosted: Fri Mar 20, 2020 6:10 pm    Post subject: Re: Why can't I ssh from wifi device to wifi device? Reply with quote

joanandk wrote:
RayDude wrote:
Has anyone ever come across something like this before?

Things to check:
a) Does SSH from either machines work on a wired system?
b) let tcpdump run on the other machine while trying to ssh to it.
c) check if the router has wlan isolation enabled.

BR


a) Yes. If I ssh from wired to wireless it works.
b) I'll do that when I have some time.
c) I looked for that option, but couldn't find it, I'll look again.
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NeddySeagoon
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PostPosted: Fri Mar 20, 2020 7:14 pm    Post subject: Reply with quote

RayDude,

Do you have both wired and wireless interfaces active and in the same subnet?
If so, you may be getting a reply over the wrong interface, so it never gets to your ssh window.

Multiple interfaces in the same subnet is usually a verybadthing.
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RayDude
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PostPosted: Fri Mar 20, 2020 11:41 pm    Post subject: Reply with quote

Thanks Neddy.

NeddySeagoon wrote:
RayDude,

Do you have both wired and wireless interfaces active and in the same subnet?
If so, you may be getting a reply over the wrong interface, so it never gets to your ssh window.

Multiple interfaces in the same subnet is usually a verybadthing.


I only have on active interface on both devices, but the wifi and ethernet are on the same subnet.

I went to look for the settings in the router to see if I had wifi isolation on, but found there was a new version of firmware that fixed a lot of bugs.

I installed it and the problem seems to have gone away.

Again, thanks for posting.
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