chap-secrets

# Secrets for authentication using CHAP
# client        server  secret                            IP addresses

delta           pptpd   notyourluckydaytoday  *

iptables -L

# iptables -t filter -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
# sudo iptables -t nat -L
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination
MASQUERADE  all  --  anywhere             anywhere

pptpd-options

###############################################################################
# $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, ...
# {{{
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
# }}}




# 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 10.0.0.1
#ms-dns 10.0.0.2


# 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 10.0.0.3
#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
#I can't see the above giving any effect however --bp

# 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

pptpd.conf

###############################################################################
# $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 192.168.0.202
remoteip 192.168.0.100-199

rc.local

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

#PPTP IP FORWARDING
iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE

#SSH BRUTE FORCE PROTECTION
#iptables -A INPUT -i eth1 -p tcp --dport 22 -m state --state NEW -m recent --set --name SSH
#iptables -A INPUT -i eth1 -p tcp --dport 22 -m state --state NEW -m recent --update --seconds 60 --hitcount 8 --rttl --name SSH -j DROP

exit 0
/etc/rc.local

Relevant logs from the Windows diagnostics

[7320] 11-17 23:49:14:123: RasGetConnectStatus: read phonenumber </endpoint-address> from port user data
[9988] 11-17 23:49:14:127: NotifyCaller done (dwNotifyResult=1)
[9988] 11-17 23:49:14:128: GetLogonUser=Santi
[9988] 11-17 23:49:14:128: GetLogonDomain=DELTA
[9988] 11-17 23:49:14:129: RASCS_ConnectDevice
[9988] 11-17 23:49:14:129: RasDeviceSetInfo done(0)
[9988] 11-17 23:49:14:129: SetDeviceParamBinary for RDT_Tunnel_Sstp
[9988] 11-17 23:49:14:130: GUID is 625d2c97-313d-48b2
[9988] 11-17 23:49:14:159: GetSstpDestinationInfo completes with 0: Proxy Query Status: 0 DestInfoSize: 120
[9988] 11-17 23:49:14:159: GetSstpDestinationInfo completes with CorrelationID length 16.GUID is 625d2c97-313d-48b2
[9988] 11-17 23:49:14:160: RasDeviceSetInfo(Binary) done(0)
[9988] 11-17 23:49:14:160: SetDeviceParamBinary returned 0
[9988] 11-17 23:49:14:160: RasDeviceSetInfo(Compartment=1)...
[9988] 11-17 23:49:14:161: RasDeviceSetInfo done(0)
[9988] 11-17 23:49:14:161: SetDeviceParams(rastapi, WAN Miniport (SSTP), 0)
[9988] 11-17 23:49:14:161: RasDeviceConnect(rastapi,WAN Miniport (SSTP))...
[9988] 11-17 23:49:14:166: RasDeviceConnect done(600)
[9988] 11-17 23:49:14:166: RasDialMachine errors=600,0
[9988] 11-17 23:49:14:166: WaitForDialMachineEvent
[9988] 11-17 23:49:14:166: WaitForDialMachineEvent: event from rasman
[9988] 11-17 23:49:14:166: WaitForDialMachineEvent: a context received
[9988] 11-17 23:49:14:166: ValidateDmContext:
[9988] 11-17 23:49:14:166: ValidateDmContext: hrasconn block contains a different context pointer or type
[9988] 11-17 23:49:14:166: ValidateDmContext: hrasconn block verification passed
[9988] 11-17 23:49:14:166: WaitForDialMachineEvent: pOverlapped=0x4f8d1a4, type=1
[9988] 11-17 23:49:14:166: AppendNewContextToQueue:
[9988] 11-17 23:49:14:166: AppendNewContextToQueue:Set Event:
[9988] 11-17 23:49:14:166: WaitForDialMachineEvent: event from dial machine
[9988] 11-17 23:49:14:166: GetOneContextFromQueue
[9988] 11-17 23:49:14:166: GetOneContextFromQueue: The context is:0x04F8D1A4,type=1
[9988] 11-17 23:49:14:167: GetOneContextFromQueue: Number of Messages left in the queue is:0
[9988] 11-17 23:49:14:167: ValidateDmContext:
[9988] 11-17 23:49:14:167: ValidateDmContext: hrasconn block contains a different context pointer or type
[9988] 11-17 23:49:14:167: ValidateDmContext: hrasconn block verification passed
[9988] 11-17 23:49:14:167: WaitForDialMachineEvent: pOverlapped=0x4f8d1a4, type=1
[9988] 11-17 23:49:14:167: WaitForDialMachineEvent: Unblock i=0, h=0x4f8d16c
[9988] 11-17 23:49:14:167: Link dropped!

sysctl.conf

#
# /etc/sysctl.conf - Configuration file for setting system variables
# See /etc/sysctl.d/ for additional system variables.
# See sysctl.conf (5) for information.
#

#kernel.domainname = example.com

# Uncomment the following to stop low-level messages on console
#kernel.printk = 3 4 1 3

##############################################################3
# Functions previously found in netbase
#

# Uncomment the next two lines to enable Spoof protection (reverse-path filter)
# Turn on Source Address Verification in all interfaces to
# prevent some spoofing attacks
#net.ipv4.conf.default.rp_filter=1
#net.ipv4.conf.all.rp_filter=1

# Uncomment the next line to enable TCP/IP SYN cookies
# See http://lwn.net/Articles/277146/
# Note: This may impact IPv6 TCP sessions too
#net.ipv4.tcp_syncookies=1

# Uncomment the next line to enable packet forwarding for IPv4
net.ipv4.ip_forward=1

# Uncomment the next line to enable packet forwarding for IPv6
#  Enabling this option disables Stateless Address Autoconfiguration
#  based on Router Advertisements for this host
#net.ipv6.conf.all.forwarding=1


###################################################################
# Additional settings - these settings can improve the network
# security of the host and prevent against some network attacks
# including spoofing attacks and man in the middle attacks through
# redirection. Some network environments, however, require that these
# settings are disabled so review and enable them as needed.
#
# Do not accept ICMP redirects (prevent MITM attacks)
#net.ipv4.conf.all.accept_redirects = 0
#net.ipv6.conf.all.accept_redirects = 0
# _or_
# Accept ICMP redirects only for gateways listed in our default
# gateway list (enabled by default)
# net.ipv4.conf.all.secure_redirects = 1
#
# Do not send ICMP redirects (we are not a router)
#net.ipv4.conf.all.send_redirects = 0
#
# Do not accept IP source route packets (we are not a router)
#net.ipv4.conf.all.accept_source_route = 0
#net.ipv6.conf.all.accept_source_route = 0
#
# Log Martian Packets
#net.ipv4.conf.all.log_martians = 1
#