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ru.linux
- RU.LINUX ---------------------------------------------------------------------
From : Pavel A. Bragin 2:5020/400 18 Mar 2003 15:38:31
To : All
Subject : Проблемы с роутингом 2
--------------------------------------------------------------------------------
Привел, Олл! Что-то никто не отозвался на прошлый крик о помощи. Hаверное в
этом виноват я сам, поэтому вношу в мессагу исправления и дополнения. И да
простит меня великий модератор.
У меня есть машинка с ALT Linux Master 2.0 с двумя сетевыми ифейсами eth0 и
eth1. Hулевой смотрит в интернет, первый в локалку.
Вот параметры:
ifconfig:
=====================================================
eth0 Link encap:Ethernet HWaddr 00:60:94:23:1C:C8
inet addr:213.85.29.35 Bcast:213.85.29.63 Mask:255.255.255.224
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:78736 errors:0 dropped:0 overruns:0 frame:0
TX packets:926 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:9495342 (9.0 Mb) TX bytes:70968 (69.3 Kb)
Interrupt:11 Base address:0xc400
eth1 Link encap:Ethernet HWaddr 00:05:5D:35:03:D7
inet addr:192.168.150.1 Bcast:192.168.150.255 Mask:255.255.255.0
IPX/Ethernet 802.2 addr:00012344:00055D3503D7
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:92005 errors:0 dropped:0 overruns:0 frame:0
TX packets:21505 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:10708211 (10.2 Mb) TX bytes:2079221 (1.9 Mb)
Interrupt:14 Base address:0x8000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
=========================================================
nestat -rn:
==========================================================
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
213.85.29.32 0.0.0.0 255.255.255.224 U 40 0 0
eth0
192.168.150.0 0.0.0.0 255.255.255.0 U 40 0 0
eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 40 0 0 lo
0.0.0.0 213.85.29.49 0.0.0.0 UG 40 0 0
eth0
==========================================================
/prpc/sys/net/ipv4:
==========================================================
/proc/sys/net/ipv4/ip_forward = 1
/prpc/sys/net/ipv4/conf/all/accept_redirect = 1
/prpc/sys/net/ipv4/conf/all/accept_soutce_routing = 1
/prpc/sys/net/ipv4/conf/all/forwarding = 1
==========================================================
rc.firewall (iptables):
==========================================================
###########################################################################
#
# 1. Configuration options.
#
#
# 1.1 Internet Configuration.
#
INET_IP="213.85.29.35"
INET_IFACE="eth0"
INET_BROADCAST="213.85.29.224"
#
# 1.1.1 DHCP
#
#
# 1.1.2 PPPoE
#
#
# 1.2 Local Area Network configuration.
#
# your LAN's IP range and localhost IP. /24 means to only use the first 24
# bits of the 32 bit IP address. the same as netmask 255.255.255.0
#
LAN_IP="192.168.150.1"
LAN_IP_RANGE="192.168.150.0/24"
LAN_BROADCAST_ADDRESS="192.168.150.255"
LAN_IFACE="eth1"
#
# 1.3 DMZ Configuration.
#
#
# 1.4 Localhost Configuration.
#
LO_IFACE="lo"
LO_IP="127.0.0.1"
#
# 1.5 IPTables Configuration.
#
IPTABLES="/sbin/iptables"
#
# 1.6 Other Configuration.
#
###########################################################################
#
# 2. Module loading.
#
#
# Needed to initially load modules
#
/sbin/depmod -a
#
# 2.1 Required modules
#
/sbin/modprobe ip_tables
/sbin/modprobe ip_conntrack
/sbin/modprobe iptable_filter
/sbin/modprobe iptable_mangle
/sbin/modprobe iptable_nat
/sbin/modprobe ipt_LOG
/sbin/modprobe ipt_limit
/sbin/modprobe ipt_state
#
# 2.2 Non-Required modules
#
#/sbin/modprobe ipt_owner
#/sbin/modprobe ipt_REJECT
#/sbin/modprobe ipt_MASQUERADE
#/sbin/modprobe ip_conntrack_ftp
#/sbin/modprobe ip_conntrack_irc
#/sbin/modprobe ip_nat_ftp
#/sbin/modprobe ip_nat_irc
###########################################################################
#
# 3. /proc set up.
#
#
# 3.1 Required proc configuration
#
echo "1" > /proc/sys/net/ipv4/ip_forward
#
# 3.2 Non-Required proc configuration
#
#echo "1" > /proc/sys/net/ipv4/conf/all/rp_filter
#echo "1" > /proc/sys/net/ipv4/conf/all/proxy_arp
#echo "1" > /proc/sys/net/ipv4/ip_dynaddr
###########################################################################
#
# 4. rules set up.
#
######
# 4.1 Filter table
#
#
# 4.1.1 Set policies
#
$IPTABLES -P INPUT DROP -j LOG --log-prefix "INPUT:"
$IPTABLES -P OUTPUT DROP -j LOG --log-prefix "OUTPUT:"
$IPTABLES -P FORWARD DROP -j LOG --log-prefix "FORWARD:"
#
# 4.1.2 Create userspecified chains
#
#
# Create chain for bad tcp packets
#
$IPTABLES -N bad_tcp_packets
#
# Create separate chains for ICMP, TCP and UDP to traverse
#
$IPTABLES -N allowed
$IPTABLES -N tcp_packets
$IPTABLES -N udp_packets
$IPTABLES -N icmp_packets
#
# 4.1.3 Create content in userspecified chains
#
#
# bad_tcp_packets chain
#
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j LOG \
--log-prefix "New not syn:"
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j DROP
#
# allowed chain
#
$IPTABLES -A allowed -p TCP --syn -j ACCEPT
$IPTABLES -A allowed -p TCP -m state --state ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A allowed -p TCP -j DROP
#
# TCP rules
#
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 20 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 21 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 22 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 25 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 53 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 80 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 113 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 119 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 443 -j allowed
$IPTABLES -A tcp_packets -p TCP -s 0/0 --dport 1352 -j allowed
#
# UDP ports
#
$IPTABLES -A udp_packets -p UDP -s 0/0 --destination-port 53 -j ACCEPT
$IPTABLES -A udp_packets -p UDP -s 0/0 --destination-port 123 -j ACCEPT
$IPTABLES -A udp_packets -p UDP -s 0/0 --destination-port 520 -j ACCEPT
$IPTABLES -A udp_packets -p UDP -s 0/0 --destination-port 2074 -j ACCEPT
$IPTABLES -A udp_packets -p UDP -s 0/0 --destination-port 4000 -j ACCEPT
#
# In Microsoft Networks you will be swamped by broadcasts. These lines
# will prevent them from showing up in the logs.
#
#$IPTABLES -A udp_packets -p UDP -i $INET_IFACE -d $INET_BROADCAST \
#--destination-port 135:139 -j DROP
$IPTABLES -A udp_packets -p UDP -i $LAN_IFACE -d $LAN_BROADCAST_ADDRESS \
--destination-port 135:139 -j ACCEPT
#
# If we get DHCP requests from the Outside of our network, our logs will
# be swamped as well. This rule will block them from getting logged.
#
#$IPTABLES -A udp_packets -p UDP -i $INET_IFACE -d 255.255.255.255 \
#--destination-port 67:68 -j DROP
$IPTABLES -A udp_packets -p UDP -i $LAN_IFACE -d 255.255.255.255 \
--destination-port 67:68 -j ACCEPT
#
# ICMP rules
#
$IPTABLES -A icmp_packets -p ICMP -s 0/0 --icmp-type 8 -j ACCEPT
$IPTABLES -A icmp_packets -p ICMP -s 0/0 --icmp-type 11 -j ACCEPT
#
# 4.1.4 INPUT chain
#
#
# Bad TCP packets we don't want.
#
$IPTABLES -A INPUT -p tcp -j bad_tcp_packets
$IPTABLES -A INPUT -p tcp -j LOG --log-prefix "Bad TCP pack:"
#
# Rules for special networks not part of the Internet
#
$IPTABLES -A INPUT -p ALL -i $LAN_IFACE -s $LAN_IP_RANGE -j ACCEPT
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LO_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LAN_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $INET_IP -j ACCEPT
$IPTABLES -A INPUT -p ALL -i $LAN_IFACE -d $LAN_BROADCAST_ADDRESS -j ACCEPT
#
# Special rule for DHCP requests from LAN, which are not caught properly
# otherwise.
#
$IPTABLES -A INPUT -p UDP -i $LAN_IFACE --dport 67 --sport 68 -j ACCEPT
#
# Rules for incoming packets from the internet.
#
$IPTABLES -A INPUT -p ALL -d $INET_IP -m state --state ESTABLISHED,RELATED \
-j ACCEPT
$IPTABLES -A INPUT -p TCP -i $INET_IFACE -j tcp_packets
$IPTABLES -A INPUT -p UDP -i $INET_IFACE -j udp_packets
$IPTABLES -A INPUT -p ICMP -i $INET_IFACE -j icmp_packets
#
# If you have a Microsoft Network on the outside of your firewall, you may
# also get flooded by Multicasts. We drop them so we do not get flooded by
# logs
#
$IPTABLES -A INPUT -i $INET_IFACE -d 224.0.0.0/8 -j DROP
#
# Log weird packets that don't match the above.
#
$IPTABLES -A INPUT -m limit --limit 3/minute --limit-burst 3 -j LOG \
--log-level DEBUG --log-prefix "IPT INPUT packet died: "
#
# 4.1.5 FORWARD chain
#
#
# Bad TCP packets we don't want
#
$IPTABLES -A FORWARD -p tcp -j bad_tcp_packets
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 20 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 21 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 22 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 25 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 53 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 80 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 113 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 119 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 443 -j allowed
$IPTABLES -A FORWARD -p TCP -s 0/0 --dport 1352 -j allowed
$IPTABLES -A FORWARD -p UDP -s 0/0 --destination-port 53 -j ACCEPT
$IPTABLES -A FORWARD -p UDP -s 0/0 --destination-port 123 -j ACCEPT
$IPTABLES -A FORWARD -p UDP -s 0/0 --destination-port 520 -j ACCEPT
$IPTABLES -A FORWARD -p UDP -s 0/0 --destination-port 2074 -j ACCEPT
$IPTABLES -A FORWARD -p UDP -s 0/0 --destination-port 4000 -j ACCEPT
$IPTABLES -A FORWARD -p ICMP -s 0/0 --icmp-type 8 -j ACCEPT
$IPTABLES -A FORWARD -p ICMP -s 0/0 --icmp-type 11 -j ACCEPT
#
# Accept the packets we actually want to forward
#
$IPTABLES -A FORWARD -i $LAN_IFACE -j ACCEPT
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
#
# Log weird packets that don't match the above.
#
$IPTABLES -A FORWARD -m limit --limit 3/minute --limit-burst 3 -j LOG \
--log-level DEBUG --log-prefix "IPT FORWARD packet died: "
#
# 4.1.6 OUTPUT chain
#
#
# Bad TCP packets we don't want.
#
$IPTABLES -A OUTPUT -p tcp -j bad_tcp_packets
#
# Special OUTPUT rules to decide which IP's to allow.
#
$IPTABLES -A OUTPUT -p ALL -s $LO_IP -j ACCEPT
$IPTABLES -A OUTPUT -p ALL -s $LAN_IP -j ACCEPT
$IPTABLES -A OUTPUT -p ALL -s $INET_IP -j ACCEPT
#
# Log weird packets that don't match the above.
#
$IPTABLES -A OUTPUT -m limit --limit 3/minute --limit-burst 3 -j LOG \
--log-level DEBUG --log-prefix "IPT OUTPUT packet died: "
######
# 4.2 nat table
#
$IPTABLES -A FORWARd -s $LAN_IP_RANGE -j MASQ
#
# 4.2.1 Set policies
#
#
# 4.2.2 Create user specified chains
#
#
# 4.2.3 Create content in user specified chains
#
#
# 4.2.4 PREROUTING chain
#
#
# 4.2.5 POSTROUTING chain
#
#
# Enable simple IP Forwarding and Network Address Translation
#
$IPTABLES -t nat -A POSTROUTING -o $INET_IFACE -j SNAT --to-source $INET_IP
#
# 4.2.6 OUTPUT chain
#
######
# 4.3 mangle table
#
#
# 4.3.1 Set policies
#
#
# 4.3.2 Create user specified chains
#
#
# 4.3.3 Create content in user specified chains
#
#
# 4.3.4 PREROUTING chain
#
#
# 4.3.5 INPUT chain
#
#
# 4.3.6 FORWARD chain
#
#
# 4.3.7 OUTPUT chain
#
#
# 4.3.8 POSTROUTING chain
#
=================================================
В результате таких настроек с компьютера с линуксом пингуется и внутренняя и
внешняя сеть.
С компьютера из внутренней сети пингуются только eth0 и eth1 самого линукса,
а дальше не пускает.
Помогите разобраться с проблемой.
--
Отправлено через сервер Форумы@mail.ru - http://talk.mail.ru
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* Origin: Talk.Mail.Ru (2:5020/400)
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Проблемы с роутингом 2 |
Pavel A. Bragin |
18 Mar 2003 15:38:31 |
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