On Mon, 11 Mar 2019 09:08:14 -0400, Philip Webb wrote:

> 190311 Neil Bothwick wrote:
> > Have you run ssh with -v
> > to see what configuration options it is reading from where.
> > Bear in mind that ssh stops at the first matching host definition,
> > so if you have a "host *" in your config, it must be last.  
> 
> This is what I get :
> 
>   522: ~> ssh -v <URL>
>   OpenSSH_7.9p1, OpenSSL 1.0.2r  26 Feb 2019
>   debug1: Reading configuration data /home/purslow/.ssh/config
>   debug1: Reading configuration data /etc/ssh/ssh_config
>   debug1: Connecting to <URL> <IP> port 22.
>   debug1: Connection established.
>   debug1: identity file /home/purslow/.ssh/id_rsa type -1
>   debug1: identity file /home/purslow/.ssh/id_rsa-cert type -1
>   debug1: identity file /home/purslow/.ssh/id_dsa type -1
>   debug1: identity file /home/purslow/.ssh/id_dsa-cert type -1
>   debug1: identity file /home/purslow/.ssh/id_ecdsa type -1
>   debug1: identity file /home/purslow/.ssh/id_ecdsa-cert type -1
>   debug1: identity file /home/purslow/.ssh/id_ed25519 type -1
>   debug1: identity file /home/purslow/.ssh/id_ed25519-cert type -1
>   debug1: identity file /home/purslow/.ssh/id_xmss type -1
>   debug1: identity file /home/purslow/.ssh/id_xmss-cert type -1
>   debug1: Local version string SSH-2.0-OpenSSH_7.9
>   debug1: Remote protocol version 2.0, remote software version
> OpenSSH_3.7.1p2 debug1: match: OpenSSH_3.7.1p2 pat OpenSSH_3.* compat
> 0x01000002 debug1: Authenticating to <URL>:22 as 'purslow'
>   debug1: SSH2_MSG_KEXINIT sent
>   debug1: SSH2_MSG_KEXINIT received
>   debug1: kex: algorithm: (no match)
>   Unable to negotiate with <IP> port 22: no matching key exchange
> method found. Their offer:
> diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
> 
> Is that any help ?

It shows that ssh is reading your config file, but not picking up the
options for this host. I would expect to see something like

debug1: Reading configuration data /home/nelz/.config/ssh
debug1: /home/nelz/.config/ssh line N: Applying options for <HOST>

Do you have any other Host stanzas in the config?


-- 
Neil Bothwick

Make it idiot proof and someone will make a better idiot.