###############################################################################
# $Id: pptpd.conf 4255 2004-10-03 18:44:00Z rene $
#
# 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/pptpd-options

# 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: localip
# TAG: remoteip
#    Specifies the local and remote IP address ranges.
#
#       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 MAX_CONNECTIONS, it will
#       start at the beginning of the list and go until it gets 
#       MAX_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 10.0.10.250
remoteip 10.0.10.240-255
# or
#localip 192.168.0.234-238,192.168.0.245
#remoteip 192.168.1.234-238,192.168.1.245

###############################################################################
# $Id: pptpd-options 4643 2006-11-06 18:42:43Z rene $
#
# Sample Poptop PPP options file /etc/ppp/pptpd-options
# 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

# Optional: domain name to use for authentication
# domain mydomain.net

# Strip the domain prefix from the username before authentication.
# (applies if you use pppd with chapms-strip-domain patch)
#chapms-strip-domain


# Encryption
# Debian: on systems with a kernel built with the package
# kernel-patch-mppe >= 2.4.2 and using ppp >= 2.4.2, ...
# {{{
# 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)
# }}}




# 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.
# Attention! This information may not be taken into account by a Windows
# client. See KB311218 in Microsoft's knowledge base for more information.
ms-dns 192.168.1.11
ms-dns 10.0.10.10
ms-dns 8.8.8.8
ms-dns 10.0.10.105

# 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 10.0.10.10
#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

# Debian: do not replace the default route
nodefaultroute


# Logging

# Enable connection debugging facilities.
# (see your syslog configuration for where pppd sends to)
#debug
logfile /var/log/pptpd.log

# 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 
require-mppe

#!/bin/sh


IF_PPTP=${PPP_IFACE}
IP_PPTP=${PPP_REMOTE}

OUT_IFACES="eth0 eth1"

iptables -A INPUT -m udp -p udp --dport 53 -i ${IF_PPTP} -s ${IP_PPTP} -j ACCEPT

for eth1 in ${OUT_IFACES}; do
    iptables -A FORWARD -i ${IF_PPTP} -o eth1 -s ${IP_PPTP} -j ACCEPT
    iptables -A FORWARD -i eth1 -o ${IF_PPTP} -d ${IP_PPTP} -m state --state RELATED,ESTABLISHED -j ACCEPT
done

# Generated by iptables-save v1.4.4 on Thu May  5 19:50:30 2011
*nat
:OUTPUT ACCEPT [0:0]
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
#NAT для главной локальной сети, смотрящий на ограниченную локальную сеть.
-A POSTROUTING -s 10.0.0.0/255.0.0.0 -o eth1 -j MASQUERADE
COMMIT
# Completed on Thu May  5 19:50:30 2011
# Generated by iptables-save v1.4.4 on Thu May  5 19:50:30 2011
*mangle
:PREROUTING ACCEPT [73:6219]
:INPUT ACCEPT [38:3642]
:FORWARD ACCEPT [33:2477]
:OUTPUT ACCEPT [14:5343]
:POSTROUTING ACCEPT [47:7820]
COMMIT
# Completed on Thu May  5 19:50:30 2011
# Generated by iptables-save v1.4.4 on Thu May  5 19:50:30 2011
*filter
:FORWARD DROP [0:0]
:INPUT DROP [0:0]
:OUTPUT ACCEPT [0:0]
# Разрешаем трафик с внутреннего интерфейса.
-A INPUT -i lo -j ACCEPT
# Впускаем ответы на запросы которые сами отправили.
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
# Разрешаем весь трафик со стороны сети департамента(главной локальной сети+интернет)
-A INPUT -i eth0 -j ACCEPT
# Разрешаем весь трафик необходимый для работы PPTP-сервера.
-A INPUT -p tcp -m tcp --dport 1723 -j ACCEPT
-A INPUT -p gre -j ACCEPT
-A INPUT -m state -i eth1 --state ESTABLISHED,RELATED -j ACCEPT
-A FORWARD -i eth0 -o eth1 -j ACCEPT
# Разрешаем пересылку в локальную сеть ответов на исходящие запросы.
-A FORWARD -m state -i eth1 -o eth0 --state ESTABLISHED,RELATED -j ACCEPT
# -A INPUT -p tcp -m tcp --dport 2371 -j ACCEPT -A INPUT -p udp -m udp --dport 2371 -j ACCEPT 
# Разрешаем все пинги.
-A INPUT -p icmp -j ACCEPT
COMMIT
# Completed on Thu May  5 19:50:30 2011

iptables -I FORWARD -i ppp+ -j ACCEPT

for eth1 in ${OUT_IFACES}; do
    iptables -A FORWARD -i ${IF_PPTP} -o eth1 -s ${IP_PPTP} -j ACCEPT
    iptables -A FORWARD -i eth1 -o ${IF_PPTP} -d ${IP_PPTP} -m state --state RELATED,ESTABLISHED -j ACCEPT
done

for eth1 in ${OUT_IFACES}; do
    iptables -A FORWARD -i ${IF_PPTP} -o eth1 -s ${IP_PPTP} -j ACCEPT
    iptables -A FORWARD -i eth1 -o ${IF_PPTP} -d ${IP_PPTP} -m state --state RELATED,ESTABLISHED -j ACCEPT
done

# Перебираем интерфейсы
for IF_EXT in ${OUT_IFACES}; do
    # Разрешаем трафик с клиента через этот интерфейс
    iptables -A FORWARD -i ${IF_PPTP} -o ${IF_EXT} -s ${IP_PPTP} -j ACCEPT
    # Разрешаем трафик с этого интерфейса в сторону клиента
    iptables -A FORWARD -i ${IF_EXT} -o ${IF_PPTP} -d ${IP_PPTP} -m state --state RELATED,ESTABLISHED -j ACCEPT
done