SSL_SESSION_ID on RHEL 5.5

HI!

For security reasons I'm using env var SSL_SESSION_ID to cross-check the
application's session ID with the SSL session ID in my web application. This
works without any issues on my openSUSE boxes. Browser is Seamonkey 2.0.4.

But I have problems with Apache 2.2.3 shipped with
Red Hat Enterprise Linux Server release 5.5 (Tikanga)
Cery soon the SSL session seems to be renegotiated resulting in a new value in
SSL_SESSION_ID

Relevant settings for SSL session resumptions:

SSLSessionCache shmcb:/var/cache/mod_ssl/scache(512000)
SSLSessionCacheTimeout 7200

Any hint? Were there relevant fixes to mod_ssl after release 2.2.3? Or maybe
Red Hat backported patches against renegotiation attacks which cause the issue?

Ciao, Michael.
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