프로그램_putty_접속 시 오류

putty (멀티탭)로 접속시 "Couldn't agree a key exchange algorithm" 오류 뜨는 경우

puttycm, superPutty, MTPutty, putty_nd와 putty  버전이 안맞아서 발생하는 문제임 

 

[참고_원문] 

출처: https://kb.vmware.com/s/article/51526

VMware Knowledge Base

"Couldn't agree a key exchange algorithm" error with Putty connecting to ESXi or vCenter Server Appliance (51526)

---

Last Updated: 2021. 8. 12.Categories: InformationalTotal Views: 34115 93Language:                 Chinese (Simplified)JapaneseEnglish                         SUBSCRIBE

 

Learn how VMware Skyline Advisor and Skyline Health Diagnostics work together to provide proactive intelligence and self-service log analysis.

• Use Skyline Advisor to avoid issues before they occur across VCF, vSphere, vSAN, NSX, vROps & Horizon. Skyline Findings are based on top KBs, VMSAs/CVEs and design best practices.
• Use Skyline Health Diagnostics to root cause vSphere & vSAN logs when an issue occurs. Skyline Health Diagnostic Findings are based on top KBs and VMSA/CVEs. You can use the Skyline Health Diagnostics tool in online or offline mode.
• If you require additional help from technical support, please use Skyline Advisor to initiate a Log Assist to reduce time to upload logs. TSEs can also initiate logs to reduce effort.

Symptoms

SSH or WinSCP connection to ESXi host or vCenter Server Appliance fails a message similar to:
Couldn't agree a key exchange algorithm (available: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521, diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,)

Cause

The Couldn't agree a key exchange algorithm is expected behavior with older version of PuTTy or PuTTy integrated solutions like WInSCP.

Resolution

To resolve this issue, upgrade PuTTy to a version to 0.65 or later from http://www.putty.org/