Wireless Access

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Occasional Contributor I
Posts: 5
Registered: ‎11-29-2010

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 172.16.0.200 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 172.16.12.1 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
Posts: 135
Registered: ‎07-06-2012

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
Posts: 5
Registered: ‎11-29-2010

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!)

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