For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

John_Ogle_45372's avatar
John_Ogle_45372
Icon for Nimbostratus rankNimbostratus
Apr 21, 2015

how to determine cipher list?

What commands can I run against my webserver to determine what ciphers he is accepting? Is this possible with some type of openssl command?   Thank you,  
application delivery
LTM
Hannes_Rapp's avatar
Hannes_Rapp
Icon for Nimbostratus rankNimbostratus
Apr 21, 2015

Hi,

 

The OpenSSL program does not offer the output you're looking for. Convenient solutions to your problem include

 

1) Using a BASH/PYTHON/PERL script which executes an OpenSSL command that tries to establish an SSL session with specific cipher suite, one after another.

 

2) Online SSL checker, e.g. https://www.ssllabs.com/ssltest/index.html - this will print out the SSL/TLS versions and cipher suites which are accepted by the webserver (does the exact same thing as 1). Only suitable for publicly open HTTPS services, alternatively you can create an IP whitelist for Qualys lab tools.