iptable rules for squid server..
Hi,
I am running squid 2.7 as cache/proxy server on ubuntu 9.4. Proxy server is accessed by clients with proxy settings in browsers.. proxy address: 192.168.1.100:8080 What I'm looking for is.. Clients should only be able to http, https, ftp through squid. if they do not set proxy then internet facility should not be available.. How ever I need to let them chat. I need iptable rules that would: accept only connection to 192.168.1.100:8080 except for yahoo, aim, msn chatting.. internet device= ppp0 lan device = eth1 squid server = 192.168.1.100:8080 thanks in advance. Cheers!! |
It would be difficult to setup iptables rules for IM since
they use may different servers with may different IPs that change so your tables would be crazy. For me it seems that configuring the squid server with rules to allow the IM services should be easier since the proxy can work on domains (not IPs) at the rules and it's simpler to configure. Perhaps, you could explain us more what are you trying to accomplish, limit bandwith, limit internet access etc. Best regards, |
Thank you for your reply..
Scenario is: NETWORK CARDS: 2 NIC's 1->Internet eth1 & ppp0 2->eth1 LAN clients SERVER: UBUNTU 9.4 Squid 2.7 stable with db auth Mysqldb dhcp2-server for lan firewall: iptables Internet Connection: ppp0 over eth1 DHCP assigned addresses for eth1 & ppp0 Lan connections: eth1 Clients: 20 network: 192.168.1.0/24 squid :192.168.1.100:8080 What I need: iptable rules for firewall that can: allow only access to 192.168.1.100:8080(squid 2.7) from LAN Want to know: do i need NAT'ing with squid? as my internt connections allows only ppp0 address to access internet with authentication on their server. squid.conf auth_param basic program /usr/lib/squid/squid_db_auth --user xxxxx --password xxxxxxxxxx --plaintext --presist auth_param basic children 2 auth_param basic realm web-Proxy auth_param basic credentialsttl 5 minute auth_param basic casesensitive off acl all src all 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 192.168.1.0/24 # RFC1918 possible internal network acl SSL_ports port 443 # https acl SSL_ports port 563 # snews acl SSL_ports port 873 # rsync 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 Safe_ports port 631 # cups acl Safe_ports port 901 # SWAT acl purge method PURGE acl CONNECT method CONNECT acl db-auth proxy_auth REQUIRED acl bad_sites url_regex '/etc/squid/sites.txt' http_access deny bad_sites http_access allow db-auth http_access allow manager localhost http_access deny manager http_access allow purge localhost http_access deny purge http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access allow localhost http_access deny all icp_access allow localnet icp_access deny all http_port 192.168.1.100:8080 hierarchy_stoplist cgi-bin ? cache_mem 512 MB maximum_object_size_in_memory 512 KB cache_dir ufs /var/spool/squid 50000 16 256 maximum_object_size 40480 KB access_log /var/log/squid/access.log squid client_netmask 255.255.255.0 refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern (Release|Package(.gz)*)$ 0 20% 2880 refresh_pattern . 0 20% 4320 acl shoutcast rep_header X-HTTP09-First-Line ^ICY\s[0-9] upgrade_http0.9 deny shoutcast acl apache rep_header Server ^Apache broken_vary_encoding allow apache extension_methods REPORT MERGE MKACTIVITY CHECKOUT shutdown_lifetime 10 seconds cache_mgr xxxxxxxxxxxxxx visible_hostname xxxxxxxxxxxx hosts_file /etc/hosts coredump_dir /var/spool/squid |
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