Здравствуйте! Проблема такова: линукс машина CentOS 6.3 работает в виде шлюза в инет для двух локалок. К машине подключены 2 провайдера.
eth0 Link encap:Ethernet HWaddr 08:00:27:83:62:D0
inet addr:192.168.7.200 Bcast:192.168.7.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe83:62d0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9597 errors:0 dropped:0 overruns:0 frame:0
TX packets:79 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2387251 (2.2 MiB) TX bytes:3534 (3.4 KiB)
eth1 Link encap:Ethernet HWaddr 08:00:27:42:C5:6F
inet addr:192.168.1.28 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe42:c56f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2704 errors:0 dropped:0 overruns:0 frame:0
TX packets:9907 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1710736 (1.6 MiB) TX bytes:1321461 (1.2 MiB)
eth2 Link encap:Ethernet HWaddr 08:00:27:D7:40:54
inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fed7:4054/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:720 (720.0 b)
eth3 Link encap:Ethernet HWaddr 08:00:27:3E:29:60
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe3e:2960/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2151 errors:0 dropped:0 overruns:0 frame:0
TX packets:2200 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:221167 (215.9 KiB) TX bytes:1760006 (1.6 MiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 192.168.0.0/24 # RFC1918 possible internal network
acl localnet src 192.168.2.0/24 # RFC1918 possible internal network
acl localnet src fc00::/7 # RFC 4193 local private network range
acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines
#################################################################################
#acl url_filtred src 192.168.0.1-192.168.0.254
#acl url_filtred src 192.168.2.1-192.168.2.254
#acl blockkeyword1 url_regex mail
#acl blockkeyword1 url_regex ok
#acl blockkeyword1 url_regex vk
#acl blocksite1 dstdomain ok.ru
#acl blocksite2 dstdomain vk.com
#acl block dstdomain "/etc/squid/blacklist.acl"
#################################################################################
acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT
acl block url_regex "/etc/squid/blacklist.acl"
#
# Recommended minimum Access Permission configuration:
#
visible_hostname proxy
cache deny all
http_access deny block
# Only allow cachemgr access from localhost
http_access allow manager localhost
http_access deny manager
# Deny requests to certain unsafe ports
http_access deny !Safe_ports
# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports
# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on "localhost" is a local user
http_access deny to_localhost
#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
http_access allow localnet
http_access allow localhost
#http_access deny blocksite1
#http_access deny blocksite2
#http_access deny blacklist url_filtred
#http_access deny block
# And finally deny all other access to this proxy
http_access deny all
# Squid normally listens to port 3128
http_port 3128 transparent
forwarded_for off
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/spool/squid 100 16 256
#cache_dir null /tmp
# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid
# Add any of your own refresh_pattern entries above these.
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern . 0 20% 4320
# Generated by iptables-save v1.4.7 on Mon Sep 14 15:04:27 2015
*nat
:PREROUTING ACCEPT [150:14588]
:POSTROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
#-A PREROUTING -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128
#-A PREROUTING -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 3128
-A PREROUTING -p tcp -m multiport --dports 80,443 -j REDIRECT --to-port 3128
-A PREROUTING -s 192.168.7.0/24 -p tcp -m tcp --dport 80 -j DNAT --to-destination 192.168.7.200:3128
-A PREROUTING -s 192.168.1.0/24 -p tcp -m tcp --dport 80 -j DNAT --to-destination 192.168.1.28:3128
-A PREROUTING -s 192.168.7.0/24 -p tcp -m tcp --dport 443 -j DNAT --to-destination 192.168.7.200:3128
-A PREROUTING -s 192.168.1.0/24 -p tcp -m tcp --dport 443 -j DNAT --to-destination 192.168.1.28:3128
-A POSTROUTING -p tcp -s 192.168.0.0/24 --dport 80 -j SNAT --to-source 192.168.0.1
-A POSTROUTING -p tcp -s 192.168.2.0/24 --dport 80 -j SNAT --to-source 192.168.2.1
-A POSTROUTING -p tcp -s 192.168.0.0/24 --dport 443 -j SNAT --to-source 192.168.0.1
-A POSTROUTING -p tcp -s 192.168.2.0/24 --dport 443 -j SNAT --to-source 192.168.2.1
-A POSTROUTING -o eth0 -j MASQUERADE
-A POSTROUTING -o eth1 -j MASQUERADE
COMMIT
# Completed on Mon Sep 14 15:04:27 2015
# Generated by iptables-save v1.4.7 on Mon Sep 14 15:04:27 2015
*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT DROP [2:160]
-A INPUT -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -i eth0 -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -i eth1 -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A INPUT -p tcp -i eth0 -m tcp --dport 3128 -j ACCEPT
-A INPUT -s 192.168.0.0/24 -i eth2 -p tcp -m tcp --dport 3128 -j ACCEPT
-A INPUT -s 192.168.2.0/24 -i eth3 -p tcp -m tcp --dport 3128 -j ACCEPT
-A INPUT -i eth2 -p icmp -j ACCEPT
-A INPUT -i eth3 -p icmp -j ACCEPT
-A INPUT -s 192.168.0.0/24 -i eth2 -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -s 192.168.0.0/24 -i eth2 -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -s 192.168.2.0/24 -i eth3 -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -s 192.168.2.0/24 -i eth3 -p udp -m udp --dport 53 -j ACCEPT
-A FORWARD -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -s 192.168.2.0/24 -i eth3 -o eth1 -p tcp -m multiport --dports 80,443 -j ACCEPT
-A FORWARD -s 192.168.0.0/24 -i eth2 -o eth0 -p tcp -m multiport --dports 80,443 -j ACCEPT
-A FORWARD -s 192.168.0.0/24 -i eth2 -o eth0 -p tcp -m tcp --dport 3128 -j ACCEPT
-A FORWARD -p icmp -m icmp --icmp-type 8 -j ACCEPT
-A OUTPUT -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT
-A OUTPUT -o eth0 -p tcp -m tcp --sport 22 -j ACCEPT
-A OUTPUT -o eth1 -p tcp -m tcp --sport 22 -j ACCEPT
-A OUTPUT -o lo -j ACCEPT
-A OUTPUT -p tcp -m tcp --sport 80 -j ACCEPT
-A OUTPUT -p tcp -m tcp --sport 443 -j ACCEPT
-A OUTPUT -o eth0 -p tcp -m tcp --sport 3128 -j ACCEPT
-A OUTPUT -o eth2 -p icmp -j ACCEPT
-A OUTPUT -o eth3 -p icmp -j ACCEPT
-A OUTPUT -s 192.168.0.0/24 -o eth2 -p tcp -m tcp --sport 53 -j ACCEPT
-A OUTPUT -s 192.168.0.0/24 -o eth2 -p udp -m udp --sport 53 -j ACCEPT
-A OUTPUT -s 192.168.2.0/24 -o eth3 -p tcp -m tcp --sport 53 -j ACCEPT
-A OUTPUT -s 192.168.2.0/24 -o eth3 -p udp -m udp --sport 53 -j ACCEPT
-A OUTPUT -s 192.168.0.0/24 -o eth2 -p tcp -m tcp --sport 3128 -j ACCEPT
-A OUTPUT -s 192.168.2.0/24 -o eth3 -p tcp -m tcp --sport 3128 -j ACCEPT
-A OUTPUT -p tcp -m tcp --sport 53 -j ACCEPT
-A OUTPUT -p udp -m udp --sport 53 -j ACCEPT
COMMIT
# Completed on Mon Sep 14 15:04:27 2015
