Cipher issue on Solaris 11.4 Post: 303037404

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Operating Systems Solaris Cipher issue on Solaris 11.4 Post 303037404 by solaris_1977 on Wednesday 31st of July 2019 02:39:45 PM

07-31-2019

Registered User

Cipher issue on Solaris 11.4

Hi,

Our most of servers are on Solaris 11.2 (with no SRU). Recently I upgraded one of them to Solaris 11.4. It has to go in multiple steps, as it can not jump fro 11.2 to 11.4 in one go. After upgrading, I can not login to server with SecureCRT and it through error

Code:

key exchange failed: cipher not compatible

One of the link on internet tells me about SecureCRT that I have:
AES-128
AES-192
AES-256

But it is looking for :
AES-128-CTR
AES-192-CTR
AES-256-CTR

I noticed that SSH was upgraded on server (Sun_SSH_2.2 to OpenSSH_7.7p1) and latest update of Oracle says "The default set of ciphers and MACs has been altered to remove unsafe algorithms. You can use the following commands to list all supported ciphers". and here is output:

Code:

# ssh -Q cipher
3des-cbc
aes128-cbc
aes192-cbc
aes256-cbc
rijndael-cbc@lysator.liu.se
aes128-ctr
aes192-ctr
aes256-ctr
aes128-gcm@openssh.com
aes256-gcm@openssh.com
chacha20-poly1305@openssh.com
#

That means my SecureCRT is old and not compatible with current solaris version. Due to management budget issues, it may probably take some time to spend money on getting latest SecureCRT.

- Is there any bypass/alternate, which should be be used to login for time-being ?

Any advice would be helpful for me to read further.

Thanks

Last edited by solaris_1977; 07-31-2019 at 04:05 PM..

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LEARN ABOUT LINUX

install-solaris

install-solaris(1M)													       install-solaris(1M)

NAME

       install-solaris - install the Solaris operating system

SYNOPSIS

       install-solaris

       install-solaris	invokes  the  Solaris  Install	program. Depending on graphical capability and available memory at the time of invocation,
       install-solaris invokes either a text-based installer or a graphical installer.

       The following minimum requirements for physical memory dictate which features are available during installation:

       For SPARC machines:

       128 MB

	   Minimum physical memory for all installation types

       128 MB

	   Minimum physical memory required for windowing system

       384 MB

	   Minimum physical memory required for graphical-based installation

       For x86 machines:

       256 MB

	   Minimum physical memory for all installation types

       256 MB

	   Minimum physical memory required for windowing system

       512 MB

	   Minimum physical memory required for graphical-based installation

       In some cases, even if the minimum physical memory is present, available virtual memory after system startup can limit the number  of  fea-
       tures available.

       install-solaris	exists	only  on  the Solaris installation media (CD or DVD) and should be invoked only from there. Refer to the  for more
       details.

       install-solaris allows installation of the operating system onto any standalone system. install-solaris loads the software available on the
       installation media. Refer to the  for disk space requirements.

       Refer to the  for more information on the various menus and selections.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcdrom  (Solaris instal-  |
       |			     |lation media)		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

       pkginfo(1), install(1M), pkgadd(1M), attributes(5)

       It is advisable to exit install-solaris by means of the exit options in the install-solaris menus.

								    23 Sep 2005 					       install-solaris(1M)