telnet command not found after upgrade to 15.2.x version

[hbldc_ucs]

Hello, if telnet is depreciated, what would be an alternative to verify ports connectivity through different interfaces?

There should be some fix of this vulnerability instead of removing telnet from the box.

[marce1000]

  - What platform : cisco device and model are you talking about ?

  M.

[hbldc_ucs]

My apology forgot to mention the model. It is Cisco WSA S696 version appliance

[marce1000]

 - @hbldc_ucs :  FYI :  https://community.cisco.com/t5/web-security/telnet-not-working-after-wsa-upgrade-to-15-0-1-004/m-p/5193977/highlight/true#M11226

  M.

[Flavio Miranda]

@hbldc_ucs 

SSH is the natural replacement for Telnet, for devices management. 

If you are trying to run Telnet from cisco device to another device to check availability, not always device have that. It would be Telnet client. You can test from another place like your machine for example. Windows does not come with client Telnet but you can enable. 

[liviu.gheorghe]

I'm subscribing to what @marce1000 asked because I have some routers running IOS 15.3.x through 15.9.x that have no issues with supporting telnet - this one being from IOS device running in CML:

R2>sho ver
Cisco IOS Software, IOSv Software (VIOS-ADVENTERPRISEK9-M), Version 15.9(3)M6, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport

Configuration register is 0x0R2>telnet 1.1.1.1
Trying 1.1.1.1 ...
% Destination unreachable; gateway or host down

R2>

[liviu.gheorghe]

It seems that telnet was removed from WSA's version 15.x due to a software defect: CSCwj30015 - Cisco Secure Web Appliance Privilege Escalation Vulnerability

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwj30015

HTH