[pptp-server] Ppp modules not automatically loading after upgrade

[Andrew Lyon]

Hi,

I just performed some RPM upgrades on our Redhat 7.3 server, I upgraded the
kernel rpms to 2.4.18-10, I applied the patch for ppp_mppe to the kernel
source and compiled both the kernel and modules successfully.

I also upgraded from ppp-mppe-2.4.1-5 to ppp-mppe-2.4.1-7.

Before this upgrade, the server would boot up and start up services,
including pptpd which would all work perfectly.

After this upgrade, I get errors when clients attempt to connect to pptpd:

Aug 22 10:42:09 LinuxServer pptpd[1966]: CTRL: Starting call (launching
pppd, opening GRE)
Aug 22 10:42:09 LinuxServer pptpd[1966]: GRE:
read(fd=5,buffer=804d9c0,len=8196) from PTY failed: status = -1 error =
Input/output error
Aug 22 10:42:09 LinuxServer pptpd[1966]: CTRL: PTY read or GRE write failed
(pty,gre)=(5,6)
Aug 22 10:42:09 LinuxServer pptpd[1966]: CTRL: Client x.x.x.x control
connection finished
Aug 22 10:42:17 LinuxServer pptpd[1969]: CTRL: Client x.x.x.x control
connection started
Aug 22 10:42:19 LinuxServer pptpd[1969]: CTRL: Starting call (launching
pppd, opening GRE)
Aug 22 10:42:19 LinuxServer pptpd[1969]: GRE:
read(fd=5,buffer=804d9c0,len=8196) from PTY failed: status = -1 error =
Input/output error
Aug 22 10:42:19 LinuxServer pptpd[1969]: CTRL: PTY read or GRE write failed
(pty,gre)=(5,6)
Aug 22 10:42:19 LinuxServer pptpd[1969]: CTRL: Client x.x.x.x control
connection finished

I realised that ppp is not loading the ppp module (ppp_generic)
automatically, I checked my modules.conf which appears to be correct:

alias ppp ppp_generic
alias ppp-compress-18 ppp_mppe
alias ppp-compress-21 bsd_comp
alias ppp-compress-24 ppp_deflate
alias ppp-compress-26 ppp_deflate
alias net-pf-47 ip_gre
alias char-major-108 ppp_generic
alias tty-ldisc-3 ppp_async
alias tty-ldisc-14 ppp_synctty

If I modprobe -v ppp, the ppp_generic module loads, and clients can connect
without any problems.

andy

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