Dear All: Linux has three card: One is 192.168.1.250 (Internet) by 192.168.1.1 The other two are: 192.168.2.1, 192.168.3.1 Client: 192.168.2.100-192.168.2.200 / IP 192.168.3.100-192.168.3.200 I have a few questions 1: I'm in the allocation of time, add squid --enable-underscore options But on a visit to the site is still has underlined 2: why Teamviever software from external links, always break, then cannot connect But, I have broken the network ,configuration files below http_port 3128 ipcache_size 1024 ipcache_low 90 ipcache_high 95 cache_mem 128 MB cache_dir ufs /var/spool/squid 4096 16 256 cache_effective_user squid cache_effective_group squid dns_nameservers 192.168.1.10 httpd_accel_host virtual httpd_accel_port 80 httpd_accel_with_proxy on httpd_accel_uses_host_header on cache_access_log /var/log/squid/access.log cache_log /var/log/squid/cache.log cache_store_log /var/log/squid/store.log visible_hostname gw.efc.cory cache_mgr kavin@xxxxxxxxxxxxxxxx acl 2 src 192.168.2.100-192.168.2.200/32 http_access allow 2 acl 3 src 192.168.3.100-192.168.3.200/32 http_access allow 3 acl all src 0.0.0.0/0.0.0.0 acl localhost src 127.0.0.1/255.255.255.255 http_access allow localhost http_access deny all *mangle :PREROUTING ACCEPT [11949307:8517837757] :INPUT ACCEPT [61863944:9774933638] :FORWARD ACCEPT [11730595:8495305567] :OUTPUT ACCEPT [40941:4437279] :POSTROUTING ACCEPT [11214754:8468974725] COMMIT *nat :PREROUTING ACCEPT [694231:44896066] :POSTROUTING ACCEPT [71812:4199611] :OUTPUT ACCEPT [1788:412902] -A POSTROUTING -m iprange --src-range 192.168.3.100-192.168.3.200 -o eth0 -j SNAT --to-source 192.168.1.250 -A POSTROUTING -m iprange --src-range 192.168.2.100-192.168.2.200 -o eth0 -j SNAT --to-source 192.168.1.250 -A PREROUTING -i eth2 -p tcp -m iprange --src-range 192.168.3.100-192.168.3.200 --dport 80 -j REDIRECT --to-ports 3128 -A PREROUTING -i eth1 -p tcp -m iprange --src-range 192.168.2.100-192.168.2.200 --dport 80 -j REDIRECT --to-ports 3128 COMMIT *filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT ACCEPT [37276:4032229] -A INPUT -p icmp -m limit --limit 1/s --limit-burst 10 -j ACCEPT -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec -A INPUT -i lo -j ACCEPT -A INPUT -p udp -m multiport --dports 53,123,161,162,500,1701,1194,1993 -j ACCEPT -A INPUT -p tcp -m multiport --dports 80,53,8080,3128,9101,9102,9103 -j ACCEPT -A INPUT -s 168.95.1.1 -j ACCEPT -A INPUT -s 168.95.192.1 -j ACCEPT -A INPUT -s 211.72.67.226 -j ACCEPT -A INPUT -s 216.146.35.35 -j ACCEPT -A INPUT -s 216.146.36.36 -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -s 168.95.1.1 -j ACCEPT -A FORWARD -s 168.95.192.1 -j ACCEPT -A FORWARD -s 211.72.67.226 -j ACCEPT -A FORWARD -s 216.146.35.35 -j ACCEPT -A FORWARD -s 216.146.36.36 -j ACCEPT -A FORWARD -d 168.95.1.1 -j ACCEPT -A FORWARD -d 168.95.192.1 -j ACCEPT -A FORWARD -d 211.72.67.226 -j ACCEPT -A FORWARD -d 216.146.35.35 -j ACCEPT -A FORWARD -d 216.146.36.36 -j ACCEPT -A FORWARD -m iprange --src-range 192.168.2.100-192.168.2.200 -d 192.168.1.176 -j ACCEPT -A FORWARD -s 192.168.10.0/24 -j ACCEPT -A FORWARD -s 192.168.11.0/24 -j ACCEPT -A FORWARD -d 192.168.10.0/24 -j ACCEPT -A FORWARD -d 192.168.11.0/24 -j ACCEPT -A FORWARD -s 10.8.0.0/24 -j ACCEPT -A FORWARD -p icmp -j ACCEPT -A FORWARD -d 211.157.108.130 -j ACCEPT -A FORWARD -d 220.128.204.167 -j ACCEPT -A FORWARD -d 211.72.67.227 -j ACCEPT -A FORWARD -d 211.72.67.226 -j ACCEPT -A FORWARD -d 220.128.204.163 -j ACCEPT -A FORWARD -d 61.66.137.4 -j ACCEPT -A FORWARD -d 61.66.137.3 -j ACCEPT -A FORWARD -d 61.66.137.5 -j ACCEPT -A FORWARD -p udp -m multiport --dports 53,123,137,138 -j ACCEPT -A FORWARD -p tcp -m multiport --dports 20,21,53,139,445,1863,5900,3128,8080 -j ACCEPT -A FORWARD -m iprange --src-range 192.168.3.100-192.168.3.200 -p tcp -m multiport --dports 80,443,25,110 -j ACCEPT -A FORWARD -m iprange --src-range 192.168.2.100-192.168.2.200 -p tcp -m multiport --dports 80,443,25,110 -j ACCEPT -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT COMMIT Hope everybody to help me to solve it Thank Kavin