Package: ppp
Version: 2.4.3-20050321+2
Severity: normal

When using poptop as an VPN server for a Windows Client, the connection
is established without errors. Transmission of small packets seems to
work as well.
However, when transmitting large packets kern.log receives the message:

mppe_compress[1]: osize too small! (have: 1400 need: 1404)

ppp is configured to require 128-bit encryption.
Altering the MTU value in the pppd options file does not help. After
reducing the MTU by four bytes the messages changes to:

mppe_compress[1]: osize too small! (have: 1396 need: 1400)

So it seems ppp wants 4 more bytes regardless of what the MTU is set to.

What does help is enabling multilink in the pppd options. However, then
the pppd process does not terminate when the peer closes the connection,
requiring an manual "kill" to allow further connections.
The server connects with pppoe (DSL) line to the outside world and it's
VPN clients.

Search engine results indicate that pppd has to be patched in order to
resolve this issue.

I'm sorry if this happens to be a false bug report.

-- System Information:
Debian Release: 3.1
Architecture: i386 (i686)
Kernel: Linux 2.6.8-2-686-smp
Locale: [EMAIL PROTECTED], [EMAIL PROTECTED] (charmap=ISO-8859-15)

Versions of packages ppp depends on:
ii  libc6                  2.3.2.ds1-22      GNU C Library: Shared libraries an
ii  libpam-modules         0.76-22           Pluggable Authentication Modules f
ii  libpam-runtime         0.76-22           Runtime support for the PAM librar
ii  libpam0g               0.76-22           Pluggable Authentication Modules l
ii  libpcap0.7             0.7.2-7           System interface for user-level pa
ii  makedev                2.3.1-77          creates device files in /dev
ii  netbase                4.21              Basic TCP/IP networking system
ii  procps                 1:3.2.1-2         The /proc file system utilities
ii  zlib1g                 1:1.2.2-4.sarge.2 compression library - runtime

-- no debconf information


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