Merhabalar,
Netfilter/iptables bir firewallumuz mevcut ayni zamanda bir kaç segment
için backbone gibi davranýyor. Bu nedenle ayrý bir makina üzerine squid
proxy kurulumu yaptýk ve de transparent olarak kullanmak istiyoruz.
firewall eth0 : 192.168.0.254/24
eth1 : 85.77.66.49/28
proxy eth0 : 85.77.66.50/28
iptables script file :
iptables -t nat -A PREROUTING -i eth0 -p tcp -s 192.168.0.0/24 --dport 80
-j DNAT --to 85.77.66.50:3128
iptables -t nat -A POSTROUTING -o eth1 -s 192.168.0.0/24 -j SNAT
--to-source 85.77.66.49
squid.conf :
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
acl localnet src 192.168.0.0/16 k
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
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localnet
http_access allow localhost
http_access deny all
icp_access allow localnet
icp_access deny all
htcp_access allow localnet
htcp_access deny all
http_port 3128 transparent
hierarchy_stoplist cgi-bin ?
cache_dir ufs /var/spool/squid 200 32 256
access_log /var/log/squid/access.log squid
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern (cgi-bin|\?) 0 0% 0
refresh_pattern . 0 20% 4320
visible_hostname proxy.edyafox.com.tr
icp_port 3130
error_directory /usr/share/squid/errors/Turkish
coredump_dir /var/spool/squid
ayarlarýmýz bu halde iken çalýþmýyor.
Yalnýz browser lardan proxy giriþi yaplýrsa sorun olmuyor. Transparent
olarak squidi aktif etmek için ne yapabilirim. Iptables kurallarý bu
senaryoya göre nasýl yapýlandýrýlmalý.
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