Description of problem: [Sat Jun 04 06:14:39.506300 2016] [:error] [pid 1512] NSSProtocol: SSL/TLS protocol initialization failed. [Sat Jun 04 06:14:39.506311 2016] [:error] [pid 1512] SSL Library Error: -8187 Security library: invalid arguments Version-Release number of selected component (if applicable): mod_nss-1.0.12-4.fc23 nss-3.24.0-1.1.fc23 Removing mod_ssl allow to start apache, but is of course not wanted.
See the upstream NSS bug https://bugzilla.mozilla.org/show_bug.cgi?id=1277569 . It is fixed but unreleased. There are no published security fixes in NSS 3.24.0 so backing down to 3.23.0 is a short-term workaround until either the fix is released upstream in NSS or patched in Fedora. Leaving as mod_nss bug for now since it can be worked around by requiring >= NSS 3.24.0 and not explicitly disabling SSL v2.
Fixed in NSS package nss-3.24.0-1.2, closing.