I’m still newbie in OpenSuse and linux in general.
Running on Leap 42.3 (with defaults settings what related to ssh) in same LAN with cisco catalyst 3750 switch which is running already year or two but never did try to ssh from Opensuse console, usually I’m using Putty on Windows.
Switch configured with default ssh conf to access it. There is no ACL rules.
I have copied ssh related settings
SW3#sh run ! hostname SW3 username bulve privilege 15 password 7 15000A0 ip domain-name are.lab ! crypto pki trustpoint TP-self-signed-669718912 enrollment selfsigned subject-name cn=IOS-Self-Signed-Certificate-669718912 revocation-check none rsakeypair TP-self-signed-669718912 ! ! crypto pki certificate chain TP-self-signed-669718912 certificate self-signed 01 30820241 308201AA A0030201 02020101 300D0609 2A864886 F70D0101 04050030 30312E30 2C060355 04031325 494F532D 53656C66 2D536967 6E65642D 43657274 69666963 6174652D 36363937 31383931 32301E17 0D393330 33303130 30303131 quit ! ip ssh version 2 interface Vlan1 ip address 192.168.0.8 255.255.255.0 ! ip default-gateway 192.168.0.1 ip classless ! line vty 0 4 exec-timeout 6666 0 logging synchronous login local transport input telnet ssh line vty 5 exec-timeout 6666 0 logging synchronous login local transport input telnet ssh line vty 6 15 login end
By the way I can connect from same box with telenet.
But have trouble with ssh. There is the error message when I’m trying to connect
are@WORKSTATION:~> ssh firstname.lastname@example.org Unable to negotiate with 192.168.0.8 port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
This is my /etc/ssh/ssh_config file
# $OpenBSD: ssh_config,v 1.30 2016/02/20 23:06:23 sobrado Exp $ # This is the ssh client system-wide configuration file. See # ssh_config(5) for more information. This file provides defaults for # users, and the values can be changed in per-user configuration files # or on the command line. # Configuration data is parsed as follows: # 1. command line options # 2. user-specific file # 3. system-wide file # Any configuration value is only changed the first time it is set. # Thus, host-specific definitions should be at the beginning of the # configuration file, and defaults at the end. # Site-wide defaults for some commonly used options. For a comprehensive # list of available options, their meanings and defaults, please see the # ssh_config(5) man page. # Minimum accepted size of the DH parameter p. By default this is set to 1024 # to maintain compatibility with RFC4419, but should be set higher. # Upstream default is identical to setting this to 2048. # KexDHMin 1024 Host * # ForwardAgent no # ForwardX11 no # If you do not trust your remote host (or its administrator), you # should not forward X11 connections to your local X11-display for # security reasons: Someone stealing the authentification data on the # remote side (the "spoofed" X-server by the remote sshd) can read your # keystrokes as you type, just like any other X11 client could do. # Set this to "no" here for global effect or in your own ~/.ssh/config # file if you want to have the remote X11 authentification data to # expire after twenty minutes after remote login. ForwardX11Trusted yes # This enables sending locale enviroment variables LC_* LANG, see ssh_config(5). SendEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES SendEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT SendEnv LC_IDENTIFICATION LC_ALL # RhostsRSAAuthentication no # RSAAuthentication yes # PasswordAuthentication yes # HostbasedAuthentication no # GSSAPIAuthentication no # GSSAPIDelegateCredentials no # GSSAPIKeyExchange no # GSSAPITrustDNS no # BatchMode no # CheckHostIP yes # AddressFamily any # ConnectTimeout 0 # StrictHostKeyChecking ask # IdentityFile ~/.ssh/identity # IdentityFile ~/.ssh/id_rsa # IdentityFile ~/.ssh/id_dsa # IdentityFile ~/.ssh/id_ecdsa # IdentityFile ~/.ssh/id_ed25519 # Port 22 Protocol 2 # Cipher 3des # Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc # MACs hmac-md5,hmac-sha1,email@example.com,hmac-ripemd160 # EscapeChar ~ # Tunnel no # TunnelDevice any:any # PermitLocalCommand no # VisualHostKey no # ProxyCommand ssh -q -W %h:%p gateway.example.com # RekeyLimit 1G 1h
Only thing I have changed is uncomment Protocol 2 after unsuccessful attempt.
Thank you for any ideas.