PPTPD, PPP 전송 시 압축 적용 및 끊김 방지 방법에 대해 알고 싶습니다.

사랑천사의 이미지

우선... 기본적인 통신은 잘 되고 있습니다.
pptpd+pppd를 이용하여 VPN망을 구축 했고요.
근대 여기서 압축 기능을 사용 하면 좋을 것 같은데 그게 마음데로 안 됩니다.

/etc/ppp/options.pptpd에 bsdcomp와 deflate옵션 등을 주어 조정을 해 보았으나 압축은 적용이 안 되더군요.

압축은 적용이 안 되지만 일단 접속은 되고 파일 주고 받기 및 서버쪽 네트워크로의 접속은 정상적입니다.
Local IP Address를 192.168.3.254로 지정 하엿고
Remote IP Address를 192.168.3.1-16으로 지정 하였씁니다.(그렇게 많은 접속을 동시에 받을 필요가 없기 때문이고 접속용 ID발급도 아마 16개를 넘기지도 못 할 것이비다.)

여기서 문제가 발생하는데, 실제로 클라이언트 족에서 보기에 연결이 끊어 진 것은 아니지만 사실상 패킷이 전송 되지 않는 등의 문제가 발생합니다. 당장 그렇게 되는 것은 아니고 장시간 사용시 그런 일이 발생합니다.

VPN을 통해 서버에 잇는 SMB를 통하여 파일을 넣고 또는 배 오고 하는데... 용량이 많아 지면 이게 중간에 가다가 멈춥니다. 그래서 보면 연결이 끊어 진 것은 아닌 것으로 표시가 되지만, 사실상 끊어 진 거나 마찬가지로 동작합니다.

처음엔 192.168.3.254로 핑을 날리면 잘 갑니다. 그러다가 그 상태가 되면 절때로 안 갑니다. 그렇게 되면 끊었다가 다시 연결 하는 수 박에 없죠.

간단히 설정 파일 두 개를 올리겠습니다.
-- pptpd.conf --

###############################################################################
# $Id: pptpd.conf,v 1.10 2006/09/04 23:30:57 quozl Exp $
#
# Sample Poptop configuration file /etc/pptpd.conf
#
# Changes are effective when pptpd is restarted.
###############################################################################
 
# TAG: ppp
#       Path to the pppd program, default '/usr/sbin/pppd' on Linux
#
ppp /usr/sbin/pppd
 
# TAG: option
#       Specifies the location of the PPP options file.
#       By default PPP looks in '/etc/ppp/options'
#
option /etc/ppp/options.pptpd
 
# TAG: debug
#       Turns on (more) debugging to syslog
#
#debug
 
# TAG: stimeout
#       Specifies timeout (in seconds) on starting ctrl connection
#
# stimeout 10
 
# TAG: noipparam
#       Suppress the passing of the client's IP address to PPP, which is
#       done by default otherwise.
#
#noipparam
 
# TAG: logwtmp
#       Use wtmp(5) to record client connections and disconnections.
#
logwtmp
 
# TAG: bcrelay <if>
#       Turns on broadcast relay to clients from interface <if>
#
#bcrelay eth1
 
# TAG: delegate
#       Delegates the allocation of client IP addresses to pppd.
#
#       Without this option, which is the default, pptpd manages the list of
#       IP addresses for clients and passes the next free address to pppd.
#       With this option, pptpd does not pass an address, and so pppd may use
#       radius or chap-secrets to allocate an address.
#
#delegate
 
# TAG: connections
#       Limits the number of client connections that may be accepted.
#
#       If pptpd is allocating IP addresses (e.g. delegate is not
#       used) then the number of connections is also limited by the
#       remoteip option.  The default is 100.
connections 16
 
# TAG: localip
# TAG: remoteip
#       Specifies the local and remote IP address ranges.
#
#       These options are ignored if delegate option is set.
#
#       Any addresses work as long as the local machine takes care of the
#       routing.  But if you want to use MS-Windows networking, you should
#       use IP addresses out of the LAN address space and use the proxyarp
#       option in the pppd options file, or run bcrelay.
#
#       You can specify single IP addresses seperated by commas or you can
#       specify ranges, or both. For example:
#
#               192.168.0.234,192.168.0.245-249,192.168.0.254
#
#       IMPORTANT RESTRICTIONS:
#
#       1. No spaces are permitted between commas or within addresses.
#
#       2. If you give more IP addresses than the value of connections,
#          it will start at the beginning of the list and go until it
#          gets connections IPs.  Others will be ignored.
#
#       3. No shortcuts in ranges! ie. 234-8 does not mean 234 to 238,
#          you must type 234-238 if you mean this.
#
#       4. If you give a single localIP, that's ok - all local IPs will
#          be set to the given one. You MUST still give at least one remote
#          IP for each simultaneous client.
#
# (Recommended)
localip 192.168.3.254
remoteip 192.168.3.1-16
# or
#localip 192.168.0.234-238,192.168.0.245
#remoteip 192.168.1.234-238,192.168.1.245

-- options.pptpd --

###############################################################################
# $Id: options.pptpd,v 1.11 2005/12/29 01:21:09 quozl Exp $
#
# Sample Poptop PPP options file /etc/ppp/options.pptpd
# Options used by PPP when a connection arrives from a client.
# This file is pointed to by /etc/pptpd.conf option keyword.
# Changes are effective on the next connection.  See "man pppd".
#
# You are expected to change this file to suit your system.  As
# packaged, it requires PPP 2.4.2 and the kernel MPPE module.
###############################################################################
 
 
# Authentication
 
# Name of the local system for authentication purposes
# (must match the second field in /etc/ppp/chap-secrets entries)
name pptpd
 
# Strip the domain prefix from the username before authentication.
# (applies if you use pppd with chapms-strip-domain patch)
#chapms-strip-domain
 
 
# Encryption
# (There have been multiple versions of PPP with encryption support,
# choose with of the following sections you will use.)
 
 
# BSD licensed ppp-2.4.2 upstream with MPPE only, kernel module ppp_mppe.o
# {{{
refuse-pap
refuse-chap
refuse-mschap
# Require the peer to authenticate itself using MS-CHAPv2 [Microsoft
# Challenge Handshake Authentication Protocol, Version 2] authentication.
require-mschap-v2
# Require MPPE 128-bit encryption
# (note that MPPE requires the use of MSCHAP-V2 during authentication)
require-mppe-128
# }}}
 
 
# OpenSSL licensed ppp-2.4.1 fork with MPPE only, kernel module mppe.o
# {{{
#-chap
#-chapms
# Require the peer to authenticate itself using MS-CHAPv2 [Microsoft
# Challenge Handshake Authentication Protocol, Version 2] authentication.
#+chapms-v2
# Require MPPE encryption
# (note that MPPE requires the use of MSCHAP-V2 during authentication)
#mppe-40        # enable either 40-bit or 128-bit, not both
#mppe-128
#mppe-stateless
# }}}
 
 
# Network and Routing
 
# If pppd is acting as a server for Microsoft Windows clients, this
# option allows pppd to supply one or two DNS (Domain Name Server)
# addresses to the clients.  The first instance of this option
# specifies the primary DNS address; the second instance (if given)
# specifies the secondary DNS address.
ms-dns 192.168.3.254
ms-dns 168.126.63.1
 
# If pppd is acting as a server for Microsoft Windows or "Samba"
# clients, this option allows pppd to supply one or two WINS (Windows
# Internet Name Services) server addresses to the clients.  The first
# instance of this option specifies the primary WINS address; the
# second instance (if given) specifies the secondary WINS address.
ms-wins 192.168.3.254
#ms-wins 10.0.0.4
 
# Add an entry to this system's ARP [Address Resolution Protocol]
# table with the IP address of the peer and the Ethernet address of this
# system.  This will have the effect of making the peer appear to other
# systems to be on the local ethernet.
# (you do not need this if your PPTP server is responsible for routing
# packets to the clients -- James Cameron)
proxyarp
 
# Normally pptpd passes the IP address to pppd, but if pptpd has been
# given the delegate option in pptpd.conf or the --delegate command line
# option, then pppd will use chap-secrets or radius to allocate the
# client IP address.  The default local IP address used at the server
# end is often the same as the address of the server.  To override this,
# specify the local IP address here.
# (you must not use this unless you have used the delegate option)
#10.8.0.100
 
 
# Logging
 
# Enable connection debugging facilities.
# (see your syslog configuration for where pppd sends to)
#debug
 
# Print out all the option values which have been set.
# (often requested by mailing list to verify options)
#dump
 
 
# Miscellaneous
 
# Create a UUCP-style lock file for the pseudo-tty to ensure exclusive
# access.
lock
 
# Disable BSD-Compress compression
#nobsdcomp
 
# Disable Van Jacobson compression
# (needed on some networks with Windows 9x/ME/XP clients, see posting to
# poptop-server on 14th April 2005 by Pawel Pokrywka and followups,
# <a href="http://marc.theaimsgroup.com/?t=111343175400006&r=1&w=2" rel="nofollow">http://marc.theaimsgroup.com/?t=111343175400006&r=1&w=2</a> )
#novj
#novjccomp
 
# turn off logging to stderr, since this may be redirected to pptpd,
# which may trigger a loopback
nologfd
 
# put plugins here
# (putting them higher up may cause them to sent messages to the pty)
 
deflate 12,12
#bsdcomp 8

OS는 Gentoo Linux입니다.

애휴.. 어렵군요.

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