如果有邻居偷用你的wifi,你可以get mad 或者get even (图) STH　2007-05-25 18:26:26

http://www.ex-parrot.com/~pete/upside-down-ternet.html Upside-Down-Ternet My neighbours are stealing my wireless internet access. I could encrypt it or alternately I could have fun. Split the network I\'m starting here by splitting the network into two parts, the trusted half and the untrusted half. The trusted half has one netblock, the untrusted a different netblock. We use the DHCP server to identify mac addresses to give out the relevant addresses. /etc/dhcpd.conf ddns-updates off; ddns-update-style interim; authoritative; shared-network local { subnet *.*.*.* netmask 255.255.255.0 { range *.*.*.* *.*.*.*; option routers *.*.*.*; option subnet-mask 255.255.255.0; option domain-name \"XXXXX\"; option domain-name-servers *.*.*.*; deny unknown-clients; host trusted1 { hardware ethernet *:*:*:*:*:*; fixed-address *.*.*.*; } } subnet 192.168.0.0 netmask 255.255.255.0 { range 192.168.0.2 192.168.0.10; option routers 192.168.0.1; option subnet-mask 255.255.255.0; option domain-name-servers 192.168.0.1; allow unknown-clients; } } IPtables is Fun! Suddenly everything is kittens! It\'s kitten net. /*****in/iptables -A PREROUTING -s 192.168.0.0/255.255.255.0 -p tcp -j DNAT --to-destination 64.111.96.38 For the uninitiated, this redirects all traffic to kittenwar. For more fun, we set iptables to forward everything to a transparent squid proxy running on port 80 on the machine. /*****in/iptables -A PREROUTING -s 192.168.0.0/255.255.255.0 -p tcp -m tcp --dport 80 -j DNAT --to-destination 192.168.0.1 That machine runs squid with a trivial redirector that downloads images, uses mogrify to turn them upside down and serves them out of it\'s local webserver. The redirection #!/usr/bin/perl $|=1; $count = 0; $pid = $$; while (<>) { chomp $_; if ($_ =~ /(.*\\.jpg)/i) { $url = $1; system(\"/usr/bin/wget\", \"-q\", \"-O\",\"/space/WebPages/images/$pid-$count.jpg\", \"$url\"); system(\"/usr/bin/mogrify\", \"-flip\",\"/space/WebPages/images/$pid-$count.jpg\"); print \"http://127.0.0.1/images/$pid-$count.jpg\\n\"; } elsif ($_ =~ /(.*\\.gif)/i) { $url = $1; system(\"/usr/bin/wget\", \"-q\", \"-O\",\"/space/WebPages/images/$pid-$count.gif\", \"$url\"); system(\"/usr/bin/mogrify\", \"-flip\",\"/space/WebPages/images/$pid-$count.gif\"); print \"http://127.0.0.1/images/$pid-$count.gif\\n\"; } else { print \"$_\\n\";; } $count++; } Then the internet looks like this!

好玩！但你自己得用个DHCP server，家里用这个东西的人不多。

找台旧电脑装个无线网卡做router呗