Message-ID:

I surely do hope that's a syntax error. -- Larry Wall in <199710011752.KAA21624@wall.org>

computers / comp.sys.raspberry-pi / Re: scp and rsync

scp and rsync

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From: nelsonse48@gmail.com (SteveN)
Newsgroups: comp.sys.raspberry-pi
Subject: scp and rsync
Date: Thu, 22 Feb 2024 09:15:37 -0600
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by: SteveN - Thu, 22 Feb 2024 15:15 UTC

Under rpi buster I could rsync and scp files between my rpis and my
Macs. Using the new bookworm I can no longer scp or rsync with my Macs.
I moved to bookworm because I just got my rpi5. How can I copy files
between my Macs and my rpis now? Yeah, there is flashdrives and
sneakernet but I prefer internet. Error msg 'Unable to negotiate with
192.168.1.129 port 22: no matching host key type found. Their offer:
ssh-rsa,ssh=dss (this is for scp and rsync on my rpi5 to my MacBook).
What do I need to configure?
Thanks. --Steve

Re: scp and rsync

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From: Pancho.Jones@proton.me (Pancho)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: scp and rsync
Date: Thu, 22 Feb 2024 16:40:50 +0000
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by: Pancho - Thu, 22 Feb 2024 16:40 UTC

On 22/02/2024 15:15, SteveN wrote:
> Under rpi buster I could rsync and scp files between my rpis and my
> Macs. Using the new bookworm I can no longer scp or rsync with my Macs.
> I moved to bookworm because I just got my rpi5. How can I copy files
> between my Macs and my rpis now? Yeah, there is flashdrives and
> sneakernet but I prefer internet. Error msg 'Unable to negotiate with
> 192.168.1.129 port 22: no matching host key type found. Their offer:
> ssh-rsa,ssh=dss (this is for scp and rsync on my rpi5 to my MacBook).
> What do I need to configure?
> Thanks. --Steve

Have you set up ssh keys on your rpi5?

<https://raspberrytips.com/generate-ssh-keys-on-raspberry-pi/>

Re: scp and rsync

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From: invalid@invalid.invalid (Richard Kettlewell)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: scp and rsync
Date: Thu, 22 Feb 2024 17:02:35 +0000
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by: Richard Kettlewell - Thu, 22 Feb 2024 17:02 UTC

SteveN <nelsonse48@gmail.com> writes:
> Under rpi buster I could rsync and scp files between my rpis and my
> Macs. Using the new bookworm I can no longer scp or rsync with my
> Macs. I moved to bookworm because I just got my rpi5. How can I
> copy files between my Macs and my rpis now? Yeah, there is
> flashdrives and sneakernet but I prefer internet. Error msg 'Unable
> to negotiate with 192.168.1.129 port 22: no matching host key type
> found. Their offer: ssh-rsa,ssh=dss (this is for scp and rsync on my
> rpi5 to my MacBook). What do I need to configure?

Most likely generating a new host key on the MacBook, using a less
broken algorithm, will be sufficient. With that in mind:

* What SSH version do you have on the MacBook?
To find out: ssh -V

* What host keys do you already have?
To find out: ls -l /etc/ssh

--
https://www.greenend.org.uk/rjk/

Re: scp and rsync

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From: invalid@invalid.invalid (Richard Kettlewell)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: scp and rsync
Date: Thu, 22 Feb 2024 17:03:48 +0000
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by: Richard Kettlewell - Thu, 22 Feb 2024 17:03 UTC

Pancho <Pancho.Jones@proton.me> writes:
> On 22/02/2024 15:15, SteveN wrote:
>> Under rpi buster I could rsync and scp files between my rpis and my
>> Macs. Using the new bookworm I can no longer scp or rsync with my
>> Macs. I moved to bookworm because I just got my rpi5. How can I
>> copy files between my Macs and my rpis now? Yeah, there is
>> flashdrives and sneakernet but I prefer internet. Error msg 'Unable
>> to negotiate with 192.168.1.129 port 22: no matching host key type
>> found. Their offer: ssh-rsa,ssh=dss (this is for scp and rsync on
>> my rpi5 to my MacBook). What do I need to configure?
>> Thanks. --Steve
>
> Have you set up ssh keys on your rpi5?
>
> <https://raspberrytips.com/generate-ssh-keys-on-raspberry-pi/>

Read the error message, this is about host keys on the Mac, not the user
keys on the Pi.

--
https://www.greenend.org.uk/rjk/

Re: scp and rsync

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From: Pancho.Jones@proton.me (Pancho)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: scp and rsync
Date: Thu, 22 Feb 2024 18:06:00 +0000
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by: Pancho - Thu, 22 Feb 2024 18:06 UTC

On 22/02/2024 17:03, Richard Kettlewell wrote:
> Pancho <Pancho.Jones@proton.me> writes:
>> On 22/02/2024 15:15, SteveN wrote:
>>> Under rpi buster I could rsync and scp files between my rpis and my
>>> Macs. Using the new bookworm I can no longer scp or rsync with my
>>> Macs. I moved to bookworm because I just got my rpi5. How can I
>>> copy files between my Macs and my rpis now? Yeah, there is
>>> flashdrives and sneakernet but I prefer internet. Error msg 'Unable
>>> to negotiate with 192.168.1.129 port 22: no matching host key type
>>> found. Their offer: ssh-rsa,ssh=dss (this is for scp and rsync on
>>> my rpi5 to my MacBook). What do I need to configure?
>>> Thanks. --Steve
>>
>> Have you set up ssh keys on your rpi5?
>>
>> <https://raspberrytips.com/generate-ssh-keys-on-raspberry-pi/>
>
> Read the error message, this is about host keys on the Mac, not the user
> keys on the Pi.
>

The message isn't great.

I assume you mean it is about SHA-1 being deprecated for use with RSA,
in OpenSSH 8.2. That SHA-1 is not actually part of the key, only a hash
used to sign the key. I think you explained this a year or two ago. The
point being that SHA-1 is an attribute of the SSH software, not the RSA key.

I did wonder, but assumed a MAC would automatically update its SSH
software. I'm still not sure if this is what you are getting at. Maybe
the fact it is still offering ssh=dss is the smoking gun, a sign of old
software?

Re: scp and rsync

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From: news@druck.org.uk (druck)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: scp and rsync
Date: Fri, 23 Feb 2024 19:04:09 +0000
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by: druck - Fri, 23 Feb 2024 19:04 UTC

On 22/02/2024 18:06, Pancho wrote:
> I did wonder, but assumed a MAC would automatically update its SSH
> software. I'm still not sure if this is what you are getting at. Maybe
> the fact it is still offering ssh=dss is the smoking gun, a sign of old
> software?

Yes, but you can set up a machine specific exception in
/etc/ssh/ssh_config to allow the older encryption algorithms if an
upgrade isn't forthcoming.

---druck

Re: scp and rsync

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From: ldo@nz.invalid (Lawrence D'Oliveiro)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: scp and rsync
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by: Lawrence D'Oliv - Fri, 23 Feb 2024 22:44 UTC

On Thu, 22 Feb 2024 18:06:00 +0000, Pancho wrote:

> I did wonder, but assumed a MAC would automatically update its SSH
> software.

This is Apple, remember. As with Bash and GCC and Python and others,
they’re probably allergic to the licence in the new version or something.

Re: scp and rsync

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From: invalid@invalid.invalid (Richard Kettlewell)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: scp and rsync
Date: Sat, 24 Feb 2024 14:25:33 +0000
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by: Richard Kettlewell - Sat, 24 Feb 2024 14:25 UTC

Lawrence D'Oliveiro <ldo@nz.invalid> writes:
> On Thu, 22 Feb 2024 18:06:00 +0000, Pancho wrote:
>> I did wonder, but assumed a MAC would automatically update its SSH
>> software.

Under normal circumstances SSH updates accompany macOS updates.

> This is Apple, remember. As with Bash and GCC and Python and others,
> they’re probably allergic to the licence in the new version or something.

Current macOS has OpenSSH 9.4, i.e. August last year. But what matters
here is what the OP is actually running and they’ve not yet shared that
information as far as I can see.

--
https://www.greenend.org.uk/rjk/

Re: scp and rsync

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From: droleary@2017usenet1.subsume.com (Doc O'Leary ,)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: scp and rsync
Date: Sat, 24 Feb 2024 15:26:54 -0000 (UTC)
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by: Doc O'Leary , - Sat, 24 Feb 2024 15:26 UTC

For your reference, records indicate that
SteveN <nelsonse48@gmail.com> wrote:

> Under rpi buster I could rsync and scp files between my rpis and my
> Macs. Using the new bookworm I can no longer scp or rsync with my Macs.

> What do I need to configure?

I ran into the same problem with the VLC mobile app when trying to connect
to the buster-upgraded RPi I have managing podcasts for me. Did a bit of
searching and settled on this solution:

pi@media:~ $ cat /etc/ssh/sshd_config.d/vlc.conf
HostkeyAlgorithms +ssh-rsa,ssh-dss

--
"Also . . . I can kill you with my brain."
River Tam, Trash, Firefly

Subject	Author
scp and rsync	SteveN
Re: scp and rsync	Pancho
Re: scp and rsync	Richard Kettlewell
Re: scp and rsync	Pancho
Re: scp and rsync	druck
Re: scp and rsync	Lawrence D'Oliveiro
Re: scp and rsync	Richard Kettlewell
Re: scp and rsync	Richard Kettlewell
Re: scp and rsync	Doc O'Leary ,