Hallo,
ich habe mal im Internet eine Perl programmierung gefunden. Jetzt muss ich dazu sagen: Ich habe eigentlich keine Anhung von perl, programmiere Html und Flash.Meine Frage: Kann ich das Experiment bei mir auf meinem Server (Ich hab Webspace gemietet und da steht , das das Perl unterstützt) nachmachen?
Ich habe wirklich keine Anhung was der da gemacht hat, kann man das nachmachen? Wie müsste ich das dann programmieren?
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.
/sbin/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.
/sbin/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 script
#!/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!
Link:
http://www.ex-parrot.com/%7Epete/upside-down-ternet.html
Ist English, müsste aber kein Problem sein, oder??
Vielen dank für alle antworten
Datum: 25.09.2007-17:35
Versuch nachmachen | Ist das überhaupt möglich?
