Well, looking further into it i came to a workaround. Searching the web i came to this bugreport from iceweasel https://bugzilla.mozilla.org/show_bug.cgi?id=583337#c6 In wich states that DHE with keylength < 512 is banned completey from firefox. And who would've guessed that mod_ssl, by default in our case, will get you a DHE-RSA-AES128-SHA cipher. So I changed SSLCipherSuite to (YMMV): RSA:!EXP:!NULL:+HIGH:+MEDIUM:-LOW:-MD5:-RC4 and everything got to work. Thanks.