SSH Error "Failed to connect sshd on"

General discussion on Zend Studio for IBM System i
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Joined: Fri Nov 21, 2014 3:15 pm

SSH Error "Failed to connect sshd on"

Post by ed7943 » Tue Jul 19, 2016 4:57 pm


We upgraded our IBM i to v7R1 and now i can't connect Zend Studio using SSH to the IBM.
I have tried all three suggestions mentioned by Rod Flohr, restarting SSH, Changing password length in ssh config and i am able to connect to IBM i using Putty so i am not sure why i am having this problem. I also tried creating a new connection but still did not work.

I am using Zend Studio 10.1


Posts: 393
Joined: Tue Jul 07, 2009 9:01 am

Re: SSH Error "Failed to connect sshd on"

Post by erich_hieden » Thu Jul 28, 2016 10:07 am


your Version of ZendStudio is relying on an older implementation of SSH. It needs SSH-variants which are disabled on your IBM i per default. You have two possibilities:
  1. Get a new Version of ZendStudio
  2. Change two SYSVALs on your IBM i:
    • QSSLCSLCTL = *USRDFN (be aware that this prevents the automatic addition of newer SSL-cipher suites when they become available through PTF)
    • QSSLCSL (I have the following list, I can't remember/find which ones were neccessary to add)
      • *ECDHE_ECDSA_AES_128_CBC_SHA256
      • *ECDHE_ECDSA_AES_256_CBC_SHA384
      • *ECDHE_ECDSA_AES_128_GCM_SHA256
      • *ECDHE_ECDSA_AES_256_GCM_SHA384
      • *RSA_AES_128_CBC_SHA256
      • *RSA_AES_128_CBC_SHA
      • *RSA_AES_256_CBC_SHA256
      • *RSA_AES_256_CBC_SHA
      • *RSA_AES_128_GCM_SHA256
      • *RSA_AES_256_GCM_SHA384
      • *ECDHE_RSA_AES_128_CBC_SHA256
      • *ECDHE_RSA_AES_256_CBC_SHA384
      • *ECDHE_RSA_AES_128_GCM_SHA256
      • *ECDHE_RSA_AES_256_GCM_SHA384
      • *ECDHE_ECDSA_RC4_128_SHA
      • *ECDHE_RSA_RC4_128_SHA
      • *RSA_RC4_128_SHA
      • *RSA_RC4_128_MD5
      • *RSA_DES_CBC_SHA
      • *RSA_EXPORT_RC4_40_MD5
      • *RSA_EXPORT_RC2_CBC_40_MD5
      • *RSA_NULL_SHA256
      • *RSA_NULL_SHA
      • *RSA_NULL_MD5

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Joined: Mon Dec 11, 2017 3:08 pm

Re: SSH Error "Failed to connect sshd on"

Post by arse4356 » Mon Dec 11, 2017 3:09 pm

Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. The best known example application is for remote login to computer systems by users.

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