From 1be6ebb92966edeea8a49f34a5e2e664f86c2946 Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Wed, 2 Dec 2009 19:48:18 +0100 Subject: finetune iptables, tinyproxy and dansguardian --- package/dansguardian/files/dansguardian.postinst | 4 +- package/iptables/files/firewall.conf | 119 ++++++++++++ package/iptables/files/firewall.init | 35 ++++ package/tinyproxy/Makefile | 4 +- package/tinyproxy/files/tinyproxy.conf | 228 +++++++++++++++++++++++ package/tinyproxy/files/tinyproxy.init | 1 + package/tinyproxy/files/tinyproxy.postinst | 3 + 7 files changed, 390 insertions(+), 4 deletions(-) create mode 100644 package/iptables/files/firewall.conf create mode 100755 package/iptables/files/firewall.init create mode 100644 package/tinyproxy/files/tinyproxy.conf diff --git a/package/dansguardian/files/dansguardian.postinst b/package/dansguardian/files/dansguardian.postinst index 80272f705..95f5fb639 100644 --- a/package/dansguardian/files/dansguardian.postinst +++ b/package/dansguardian/files/dansguardian.postinst @@ -1,6 +1,6 @@ #!/bin/sh . $IPKG_INSTROOT/etc/functions.sh gid=$(get_next_gid) -add_user proxy $(get_next_uid) $gid /etc/dansguardian -add_group proxy $gid +add_user dansguardian $(get_next_uid) $gid /etc/dansguardian +add_group dansguardian $gid add_rcconf dansguardian dansguardian NO diff --git a/package/iptables/files/firewall.conf b/package/iptables/files/firewall.conf new file mode 100644 index 000000000..bc9a39c41 --- /dev/null +++ b/package/iptables/files/firewall.conf @@ -0,0 +1,119 @@ +#!/bin/sh + + +echo "configure /etc/firewall.conf first." +exit 1 + +### Interfaces +WAN=ppp0 +LAN=br0 +WLAN= + +###################################################################### +### Default ruleset +###################################################################### + +### Create chains +iptables -N input_rule +iptables -N forwarding_rule +iptables -t nat -N prerouting_rule +iptables -t nat -N postrouting_rule + +### Default policy +iptables -P INPUT DROP +iptables -P FORWARD DROP + +### INPUT +### (connections with the router as destination) + +# base case +iptables -A INPUT -m state --state INVALID -j DROP +iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT +iptables -A INPUT -p tcp --tcp-flags SYN SYN --tcp-option \! 2 -j DROP + +# custom rules +iptables -A INPUT -j input_rule + +# allow access from anything but WAN +iptables -A INPUT ${WAN:+\! -i $WAN} -j ACCEPT +# allow icmp messages +iptables -A INPUT -p icmp -j ACCEPT + +# reject +iptables -A INPUT -p tcp -j REJECT --reject-with tcp-reset +iptables -A INPUT -j REJECT --reject-with icmp-port-unreachable + +### OUTPUT +### (connections with the router as source) + +# base case +iptables -A OUTPUT -m state --state INVALID -j DROP +iptables -A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT + +### FORWARD +### (connections routed through the router) + +# base case +iptables -A FORWARD -m state --state INVALID -j DROP +iptables -A FORWARD -p tcp -o $WAN --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu +iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT + +# custom rules +iptables -A FORWARD -j forwarding_rule +iptables -t nat -A PREROUTING -j prerouting_rule +iptables -t nat -A POSTROUTING -j postrouting_rule + +# allow LAN +iptables -A FORWARD -i $LAN -o $WAN -j ACCEPT + +### MASQUERADING +echo 1 > /proc/sys/net/ipv4/ip_dynaddr +iptables -t nat -A POSTROUTING -o $WAN -j MASQUERADE + +###################################################################### +### Default ruleset end +###################################################################### + +### +### Connections to the router +### + +# ssh +#iptables -A input_rule -i $WAN -p tcp -s --dport 22 -j ACCEPT + +# IPSec +#iptables -A input_rule -i $WAN -p esp -s -j ACCEPT +#iptables -A input_rule -i $WAN -p udp -s --dport 500 -j ACCEPT + +# OpenVPN +#iptables -A input_rule -i $WAN -p udp -s --dport 1194 -j ACCEPT + +# PPTP +#iptables -A input_rule -i $WAN -p gre -j ACCEPT +#iptables -A input_rule -i $WAN -p tcp --dport 1723 -j ACCEPT + +### +### VPN traffic +### + +# IPSec +#iptables -A forwarding_rule -o ipsec+ -j ACCEPT +#iptables -A forwarding_rule -i ipsec+ -j ACCEPT + +# OpenVPN +#iptables -A forwarding_rule -o tun+ -j ACCEPT +#iptables -A forwarding_rule -i tun+ -j ACCEPT + +### +### Port forwardings to LAN +### + +#iptables -t nat -A prerouting_rule -i $WAN -p tcp --dport 3389 -j DNAT --to 192.168.1.10 +#iptables -A forwarding_rule -i $WAN -p tcp --dport 3389 -d 192.168.1.10 -j ACCEPT + +# Transparent Bridging Proxy +#ebtables -t broute -A BROUTING -p IPv4 --ip-protocol 6 \ +# --ip-destination-port 80 -j redirect --redirect-target ACCEPT +#iptables -t nat -A PREROUTING -i br0 -p tcp --dport 80 \ +# -j REDIRECT --to-port 8080 + diff --git a/package/iptables/files/firewall.init b/package/iptables/files/firewall.init new file mode 100755 index 000000000..b3ea698d6 --- /dev/null +++ b/package/iptables/files/firewall.init @@ -0,0 +1,35 @@ +#!/bin/sh +#PKG iptables +#INIT 45 +. /etc/rc.conf + +case $1 in +autostop) ;; +autostart) + test x"${firewall:-NO}" = x"NO" && exit 0 + exec sh $0 start + ;; +start) + . /etc/firewall.conf + ;; +stop) + ### Clear tables + iptables -F + iptables -X + iptables -t nat -F + iptables -t nat -X + iptables -P INPUT ACCEPT + iptables -P FORWARD ACCEPT + iptables -P OUTPUT ACCEPT + iptables -t nat -P PREROUTING ACCEPT + iptables -t nat -P POSTROUTING ACCEPT + ;; +restart) + sh $0 stop + sh $0 start + ;; +*) + echo "Usage: $0 {start | stop | restart}" + ;; +esac +exit $? diff --git a/package/tinyproxy/Makefile b/package/tinyproxy/Makefile index b359bbb75..5bf6a8af8 100644 --- a/package/tinyproxy/Makefile +++ b/package/tinyproxy/Makefile @@ -5,7 +5,7 @@ include ${TOPDIR}/rules.mk PKG_NAME:= tinyproxy PKG_VERSION:= 1.6.5 -PKG_RELEASE:= 1 +PKG_RELEASE:= 2 PKG_MD5SUM:= 2b2862ba33d2939e4572688d442ba415 PKG_DESCR:= Tinyproxy is a lightweight HTTP and HTTPS proxy. PKG_SECTION:= net @@ -37,9 +37,9 @@ post-install: ${INSTALL_DIR} ${IDIR_TINYPROXY}/usr/sbin \ ${IDIR_TINYPROXY}/etc/tinyproxy \ ${IDIR_TINYPROXY}/usr/share/tinyproxy + ${INSTALL_DATA} ./files/tinyproxy.conf ${IDIR_TINYPROXY}/etc/tinyproxy ${INSTALL_BIN} ${WRKINST}/usr/sbin/tinyproxy ${IDIR_TINYPROXY}/usr/sbin/ ${INSTALL_DATA} ${WRKINST}/usr/share/tinyproxy/{debug,default,stats}.html ${IDIR_TINYPROXY}/usr/share/tinyproxy/ ${INSTALL_DATA} ${WRKINST}/usr/share/tinyproxy/HTML_VARIABLES ${IDIR_TINYPROXY}/usr/share/tinyproxy/ - ${INSTALL_DATA} ${WRKINST}/etc/tinyproxy/tinyproxy.conf ${IDIR_TINYPROXY}/etc/tinyproxy/ include ${TOPDIR}/mk/pkg-bottom.mk diff --git a/package/tinyproxy/files/tinyproxy.conf b/package/tinyproxy/files/tinyproxy.conf new file mode 100644 index 000000000..6460a2c88 --- /dev/null +++ b/package/tinyproxy/files/tinyproxy.conf @@ -0,0 +1,228 @@ +## +## tinyproxy.conf -- tinyproxy daemon configuration file +## + +# +# Name of the user the tinyproxy daemon should switch to after the port +# has been bound. +# +User tinyproxy +Group tinyproxy + +# +# Port to listen on. +# +Port 8888 + +# +# If you have multiple interfaces this allows you to bind to only one. If +# this is commented out, tinyproxy will bind to all interfaces present. +# +#Listen 192.168.0.1 + +# +# The Bind directive allows you to bind the outgoing connections to a +# particular IP address. +# +#Bind 192.168.0.1 + +# +# Timeout: The number of seconds of inactivity a connection is allowed to +# have before it closed by tinyproxy. +# +Timeout 600 + +# +# ErrorFile: Defines the HTML file to send when a given HTTP error +# occurs. You will probably need to customize the location to your +# particular install. The usual locations to check are: +# /usr/local/share/tinyproxy +# /usr/share/tinyproxy +# /etc/tinyproxy +# +# ErrorFile 404 "/usr/share/tinyproxy/404.html" +# ErrorFile 400 "/usr/share/tinyproxy/400.html" +# ErrorFile 503 "/usr/share/tinyproxy/503.html" +# ErrorFile 403 "/usr/share/tinyproxy/403.html" +# ErrorFile 408 "/usr/share/tinyproxy/408.html" + +# +# DefaultErrorFile: The HTML file that gets sent if there is no +# HTML file defined with an ErrorFile keyword for the HTTP error +# that has occured. +# +DefaultErrorFile "/usr/share/tinyproxy/default.html" + +# +# StatFile: The HTML file that gets sent when a request is made +# for the stathost. If this file doesn't exist a basic page is +# hardcoded in tinyproxy. +# +StatFile "/usr/share/tinyproxy/stats.html" + +# +# Where to log the information. Either LogFile or Syslog should be set, +# but not both. +# +Logfile "/var/log/tinyproxy.log" +# Syslog On + +# +# Set the logging level. Allowed settings are: +# Critical (least verbose) +# Error +# Warning +# Notice +# Connect (to log connections without Info's noise) +# Info (most verbose) +# The LogLevel logs from the set level and above. For example, if the LogLevel +# was set to Warning, than all log messages from Warning to Critical would be +# output, but Notice and below would be suppressed. +# +LogLevel Critical + +# +# PidFile: Write the PID of the main tinyproxy thread to this file so it +# can be used for signalling purposes. +# +PidFile "/var/run/tinyproxy.pid" + +# +# Include the X-Tinyproxy header, which has the client's IP address when +# connecting to the sites listed. +# +#XTinyproxy mydomain.com + +# +# Turns on upstream proxy support. +# +# The upstream rules allow you to selectively route upstream connections +# based on the host/domain of the site being accessed. +# +# For example: +# # connection to test domain goes through testproxy +# upstream testproxy:8008 ".test.domain.invalid" +# upstream testproxy:8008 ".our_testbed.example.com" +# upstream testproxy:8008 "192.168.128.0/255.255.254.0" +# +# # no upstream proxy for internal websites and unqualified hosts +# no upstream ".internal.example.com" +# no upstream "www.example.com" +# no upstream "10.0.0.0/8" +# no upstream "192.168.0.0/255.255.254.0" +# no upstream "." +# +# # connection to these boxes go through their DMZ firewalls +# upstream cust1_firewall:8008 "testbed_for_cust1" +# upstream cust2_firewall:8008 "testbed_for_cust2" +# +# # default upstream is internet firewall +# upstream firewall.internal.example.com:80 +# +# The LAST matching rule wins the route decision. As you can see, you +# can use a host, or a domain: +# name matches host exactly +# .name matches any host in domain "name" +# . matches any host with no domain (in 'empty' domain) +# IP/bits matches network/mask +# IP/mask matches network/mask +# +#Upstream some.remote.proxy:port + +# +# This is the absolute highest number of threads which will be created. In +# other words, only MaxClients number of clients can be connected at the +# same time. +# +MaxClients 100 + +# +# These settings set the upper and lower limit for the number of +# spare servers which should be available. If the number of spare servers +# falls below MinSpareServers then new ones will be created. If the number +# of servers exceeds MaxSpareServers then the extras will be killed off. +# +MinSpareServers 5 +MaxSpareServers 20 + +# +# Number of servers to start initially. +# +StartServers 10 + +# +# MaxRequestsPerChild is the number of connections a thread will handle +# before it is killed. In practise this should be set to 0, which disables +# thread reaping. If you do notice problems with memory leakage, then set +# this to something like 10000 +# +MaxRequestsPerChild 0 + +# +# The following is the authorization controls. If there are any access +# control keywords then the default action is to DENY. Otherwise, the +# default action is ALLOW. +# +# Also the order of the controls are important. The incoming connections +# are tested against the controls based on order. +# +Allow 127.0.0.1 +Allow 192.168.1.0/25 + +# +# The "Via" header is required by the HTTP RFC, but using the real host name +# is a security concern. If the following directive is enabled, the string +# supplied will be used as the host name in the Via header; otherwise, the +# server's host name will be used. +# +ViaProxyName "tinyproxy" + +# +# The location of the filter file. +# +#Filter "/etc/tinyproxy/filter" + +# +# Filter based on URLs rather than domains. +# +#FilterURLs On + +# +# Use POSIX Extended regular expressions rather than basic. +# +#FilterExtended On + +# +# Use case sensitive regular expressions. +# +#FilterCaseSensitive On + +# +# Change the default policy of the filtering system. If this directive is +# commented out, or is set to "No" then the default policy is to allow +# everything which is not specifically denied by the filter file. +# +# However, by setting this directive to "Yes" the default policy becomes to +# deny everything which is _not_ specifically allowed by the filter file. +# +#FilterDefaultDeny Yes + +# +# If an Anonymous keyword is present, then anonymous proxying is enabled. +# The headers listed are allowed through, while all others are denied. If +# no Anonymous keyword is present, then all header are allowed through. +# You must include quotes around the headers. +# +#Anonymous "Host" +#Anonymous "Authorization" + +# +# This is a list of ports allowed by tinyproxy when the CONNECT method +# is used. To disable the CONNECT method altogether, set the value to 0. +# If no ConnectPort line is found, all ports are allowed (which is not +# very secure.) +# +# The following two ports are used by SSL. +# +ConnectPort 443 +ConnectPort 563 diff --git a/package/tinyproxy/files/tinyproxy.init b/package/tinyproxy/files/tinyproxy.init index 26bd7c0df..cdf86e049 100644 --- a/package/tinyproxy/files/tinyproxy.init +++ b/package/tinyproxy/files/tinyproxy.init @@ -15,6 +15,7 @@ start) ;; stop) pkill tinyproxy + rm /var/run/tinyproxy.pid ;; restart) sh $0 stop diff --git a/package/tinyproxy/files/tinyproxy.postinst b/package/tinyproxy/files/tinyproxy.postinst index 4965f625d..903927e49 100644 --- a/package/tinyproxy/files/tinyproxy.postinst +++ b/package/tinyproxy/files/tinyproxy.postinst @@ -1,3 +1,6 @@ #!/bin/sh . $IPKG_INSTROOT/etc/functions.sh +gid=$(get_next_gid) +add_user tinyproxy $(get_next_uid) $gid /etc/tinyproxy +add_group tinyproxy $gid add_rcconf tinyproxy tinyproxy NO -- cgit v1.2.3