Dear all, I am shamed to tell you that I have same old problem with transparent proxying. Please help me out with this. I have created a squid 2.6 stable 21 proxy on RHEL 5.4 (Default rhel squid package). A caching DNS Server on the same machine. IPTABLES for packet filtering and for maing proxy transparent. I have Freeradius in WPA2-Enterprise mode with LDAP and SAMBA for user autentication. Internet interface 192.168.10.69 - eth0 :- connected to Wireless AP/ROUTER where NATing to our PUBLIC IP is taking place vis some switches in between. LAN Interface 10.10.10.1 - eth1 :- where my wired clients and wireless AP is connected using an L2 Swich. Everything is working fine but transparent proxying is not working for https ftp traffic. However there is no point in having a transparent proxy with out https support. Is there any thing to do if nating is taking place in my WIRELESS ACCESS POINT/ROUTER. Please refer to my squid and iptables configuration below and kindly advice me to make my proxy transparent. Squid.conf: acl all src 0.0.0.0/0.0.0.0 acl manager proto cache_object acl localhost src 127.0.0.1/255.255.255.255 acl to_localhost dst 127.0.0.0/8 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 acl wifi_users src 10.10.10.0/24 acl internal_users src 192.168.0.0/24 acl trc_users src 192.168.1.0/24 acl net src 192.168.10.69 acl blocked_sites dstdomain "/etc/squid/blocked_sites" acl blocked_words url_regex -i "/etc/squid/blocked_words acl blocked_files urlpath_regex "/etc/squid/blocked_files acl officetime time MTWHF 9:00-18:00 acl FTP proto FTP http_access deny blocked_sites officetime http_access deny blocked_words http_access deny blocked_files officetime http_access allow net http_access allow wifi_users http_access allow internal_users http_access allow trc_users always_direct allow FTP http_access allow localhost http_access deny all icp_access allow all http_port 10.10.10.1:3128 transparent hierarchy_stoplist cgi-bin ? cache_mem 52 MB maximum_object_size_in_memory 256 KB cache_dir aufs /var/spool/squid 5000 16 256 cache_swap_low 90 cache_swap_high 95 access_log /var/log/squid/access.log squid acl QUERY urlpath_regex cgi-bin \? cache deny QUERY refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern . 0 20% 4320 quick_abort_min 0 KB acl apache rep_header Server ^Apache broken_vary_encoding allow apache half_closed_clients off visible_hostname proxy.hclproxy.int hosts_file /etc/hosts memory_pools off client_db off coredump_dir /var/spool/squid IPTables Rules: # Generated by iptables-save v1.3.5 on Wed Feb 2 18:17:47 2011 *nat :PREROUTING ACCEPT [504:35119] :POSTROUTING ACCEPT [809:64589] :OUTPUT ACCEPT [812:65874] -A PREROUTING -s 10.10.10.0/255.255.255.0 -i eth1 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128 -A POSTROUTING -o eth0 -p tcp -m tcp --dport 443 -j MASQUERADE COMMIT # Completed on Wed Feb 2 18:17:47 2011 # Generated by iptables-save v1.3.5 on Wed Feb 2 18:17:47 2011 *filter :INPUT ACCEPT [187:19660] :FORWARD ACCEPT [188:10461] :OUTPUT ACCEPT [10599:3070662] -A INPUT -i lo -j ACCEPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -i eth0 -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT -A INPUT -i eth1 -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT -A INPUT -i eth2 -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT -A INPUT -p tcp -m tcp --dport 3128 -m state --state NEW -j ACCEPT -A INPUT -p tcp -m multiport --dports 389,636 -m state --state NEW -j ACCEPT -A INPUT -p tcp -m multiport --dports 445,139 -m state --state NEW -j ACCEPT -A INPUT -p udp -m multiport --dports 137,138 -m state --state NEW -j ACCEPT -A INPUT -p udp -m multiport --dports 1812,1813,1814 -m state --state NEW -j ACCEPT -A INPUT -p udp -m udp --dport 53 -m state --state NEW -j ACCEPT -A INPUT -p tcp -m tcp --dport 53 -m state --state NEW -j ACCEPT -A INPUT -p tcp -m multiport --dports 25,465 -m state --state NEW -j ACCEPT -A INPUT -p tcp -m state --state NEW -m multiport --dports 110,995 -j ACCEPT -A INPUT -p tcp -m state --state NEW -m multiport --dports 143,993 -j ACCEPT -A INPUT -p udp -m udp --dport 123 -j ACCEPT -A OUTPUT -o lo -j ACCEPT COMMIT # Completed on Wed Feb 2 18:17:47 2011 # Generated by iptables-save v1.3.5 on Wed Feb 2 18:17:47 2011 *mangle :PREROUTING ACCEPT [11619:2765966] :INPUT ACCEPT [11345:2750861] :FORWARD ACCEPT [206:11535] :OUTPUT ACCEPT [11078:3148652] :POSTROUTING ACCEPT [11423:3195498] COMMIT -- Regards, Jayakrishnan. L Visit: www.foralllinux.blogspot.com www.jayakrishnan.bravehost.com
