Wireless Access

Upcoming community maintenance Oct. 27th through Oct. 29th
For more info click here
Occasional Contributor I

SSH to Controllers, problem with encryption?

I can use freely available code to connect to SSH appliances, like NetApp.

But I am struggling to get a connection to the Aruba controllers.

[I'm using C# and the Tamir SharpSSH library]


Here is an excerpt from Putty, detailing the differences.

(Has anyone else overcome this problem? Or can offer some advice?)

I wonder of the Library can't handle SHA 256, or AES 256.

Can those be adjusted on the Aruba controller?


Any help appreciated though, thanks.


NetApp, works

2012-09-27 18:07:23 Looking up host "nas0001"
2012-09-27 18:07:23 Connecting to port 22
2012-09-27 18:07:23 Server version: SSH-2.0-OpenSSH_3.4p1
2012-09-27 18:07:23 We claim version: SSH-2.0-PuTTY_Release_0.60
2012-09-27 18:07:23 Using SSH protocol version 2
2012-09-27 18:07:24 Using Diffie-Hellman with standard group "group1"
2012-09-27 18:07:24 Doing Diffie-Hellman key exchange with hash SHA-1
2012-09-27 18:07:24 Host key fingerprint is:
2012-09-27 18:07:24 ssh-rsa 768 <removed>
2012-09-27 18:07:24 Initialised triple-DES CBC client->server encryption
2012-09-27 18:07:24 Initialised HMAC-SHA1 client->server MAC algorithm


Aruba, fails

2012-09-27 18:08:19 Looking up host "aru0001"
2012-09-27 18:08:19 Connecting to port 22
2012-09-27 18:08:19 Server version: SSH-2.0-OpenSSH_4.6
2012-09-27 18:08:19 We claim version: SSH-2.0-PuTTY_Release_0.60
2012-09-27 18:08:19 Using SSH protocol version 2
2012-09-27 18:08:19 Doing Diffie-Hellman group exchange
2012-09-27 18:08:19 Doing Diffie-Hellman key exchange with hash SHA-256
2012-09-27 18:08:19 Host key fingerprint is:
2012-09-27 18:08:19 ssh-rsa 2048 <removed>
2012-09-27 18:08:19 Initialised AES-256 SDCTR client->server encryption
2012-09-27 18:08:19 Initialised HMAC-SHA1 client->server MAC algorithm

Frequent Contributor II

Re: SSH to Controllers, problem with encryption?

hi tammi,


are trying to connect to Aruba Controller using Putty SSH ?


and it failed ?


what appear on screen once you enter MC IP and start using SSH ?


did you tried to use Telnet or SSHv1 (did it work or not)?


are you trying to get access from wireless or using wire ?


can you verify the Controller configuration ?

Occasional Contributor I

Re: SSH to Controllers, problem with encryption?

I am connecting programmatically.


I resolved the issues though. Basically, the Tamir OpenSSH library cannot use:  AES-256 SDCTR

So I switched my code to Renci SSH.Net library, and now I can add RAP configuration to my controllers with a Windows GUI.


This means our site engineers can provision and install RAPs themselves without have an admin account on the wireless controller.

(And they don't have to wait for a super-admin(tm) just to install an AP!)

Search Airheads
Showing results for 
Search instead for 
Did you mean: