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Bug#841531: marked as done (openssh-client: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1)

Your message dated Fri, 11 Apr 2025 11:26:00 +0100
with message-id <Z_juOD_TeGJm_4uk@riva.ucam.org>
and subject line Re: Bug#841531: openssh-client: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
has caused the Debian Bug report #841531,
regarding openssh-client: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
841531: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=841531
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: openssh-client
Version: 1:7.3p1-1
Severity: important

Unable to negotiate with 172.16.1.254 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

I get the above error when trying to connect to a router using openssh-client from Testing.

Connecting using the openssh-client from Stable works as expected.

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (1011, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.7.0-1-amd64 (SMP w/1 CPU core)
Locale: LANG=fi_FI.UTF-8, LC_CTYPE=fi_FI.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages openssh-client depends on:
ii  adduser           3.115
ii  dpkg              1.18.10
ii  libc6             2.24-3
ii  libedit2          3.1-20150325-1+b1
ii  libgssapi-krb5-2  1.14.3+dfsg-2
ii  libselinux1       2.5-3
ii  libssl1.0.2       1.0.2j-1
ii  passwd            1:4.2-3.2
ii  zlib1g            1:1.2.8.dfsg-2+b1

Versions of packages openssh-client recommends:
ii  xauth  1:1.0.9-1

Versions of packages openssh-client suggests:
pn  keychain      <none>
pn  libpam-ssh    <none>
pn  monkeysphere  <none>
pn  ssh-askpass   <none>

-- no debconf information

--- End Message ---
--- Begin Message --- 
On Fri, Oct 21, 2016 at 02:46:14PM +0300, Martin-Éric Racine wrote:

2016-10-21 14:40 GMT+03:00 Adam D. Barratt <adam@adam-barratt.org.uk>:

On 2016-10-21 12:26, Martin-Éric Racine wrote:

Unable to negotiate with 172.16.1.254 port 22: no matching key
exchange method found. Their offer: diffie-hellman-group1-sha1

I get the above error when trying to connect to a router using
openssh-client from Testing.

Connecting using the openssh-client from Stable works as expected.


That's to be expected, given:

openssh (1:7.1p1-1) unstable; urgency=medium

  * New upstream release (http://www.openssh.com/txt/release-7.0, closes:
    #785190):
    - Support for the legacy SSH version 1 protocol is disabled by default
      at compile time.
    - Support for the 1024-bit diffie-hellman-group1-sha1 key exchange is
      disabled by default at run-time.  It may be re-enabled using the
      instructions at http://www.openssh.com/legacy.html


That would indeed explain it.

Exception added in .ssh/config for that subnet.
Sorry for my very long delay in replying, but it looks like there's nothing else to do here. Closing. 

--
Colin Watson (he/him)                              [cjwatson@debian.org]

--- End Message ---
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