[AbeEstrada]

Disable SSLv2 and SSLv3

For Apache:

SSLProtocol all -SSLv2 -SSLv3

For Nginx:

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

Source: http://blog.rlove.org/2013/12/strong-ssl-crypto.html

[ecaron]

For any unfortunate souls using IIS, Digicert has a walkthrough of disabling SSLv3 at https://www.digicert.com/ssl-support/iis-disabling-ssl-v3.ht...

[budgi3]

For IIS:

Nartac IIS Crypto gives a nice GUI to manage all Protocols, Ciphers, Hashes and Key Exchanges https://www.nartac.com/Products/IISCrypto/