Error “The first key-exchange algorithm supported by the server is diffie-hellman-group1-sha1”

  • 1
  • Question
  • Updated 5 days ago
I have old FCX 6485.
Every time I connect through putty. I got error above.
I can solve that using this method
https://nbctcp.wordpress.com/2018/02/01/error-the-first-key-exchange-algorithm-supported-by-the-serv...

QUESTIONS:
1. any better method to solve that

tq

======
#sh ip ssh config
SSH server                 : Enabled
SSH port                   : tcp\22
Host Key                   :  RSA 2048
Encryption                 : AES-256, AES-192, AES-128, 3-DES
Permit empty password      : No
Authentication methods     : Password, Public-key, Interactive
Authentication retries     : 2
Login timeout (seconds)    : 30
Idle timeout (minutes)     : 30
Strict management VRF      : Disabled
SCP                        : Disabled
SSH IPv4 clients           : All
SSH IPv6 clients           : All
SSH IPv4 access-group      : 10
SSH IPv6 access-group      :
SSH Client Keys            :

#sh flash
Stack unit 1:
  Compressed Pri Code size = 10539581, Version:08.0.30sT7f3 (FCXR08030s.bin)
  Compressed Sec Code size = 10539581, Version:08.0.30sT7f3 (FCXR08030s.bin)
  Compressed Boot-Monitor Image size = 370695, Version:10.1.00T7f5
  Code Flash Free Space = 43515904
Photo of nbctcp

nbctcp

  • 12 Posts
  • 0 Reply Likes

Posted 5 days ago

  • 1
Photo of nbctcp

nbctcp

  • 12 Posts
  • 0 Reply Likes
Answered myself
(config)#ip ssh key-exchange-method dh-group14-sha1