After processing some updates yesterday VPN functionality is broken. Clients are promptly disconnected with an Error 734 message. The Message log shows "MPPE Required, but kernel has no support." I researched that message and think I see the problem.
There is no ppp_mppe.o file. In /lib/modules/2.6.9-55.0.12.EL/updates/ppp I see ppp.generic.ko and ppp.mppe.ko files. It appears to me that an update deleted the prior ppp_mppe.o then failed to replace it.
#pppd --version returns pppd version 2.4.4
$modprobe ppp-compress-18 results in - FATAL: Module ppp_mppe not found.
I would appreciate any information on how to repair this.