[4063] in linux-net channel archive
Re: Virtual web server
daemon@ATHENA.MIT.EDU (Bernd Eckenfels)
Fri Aug 16 20:25:39 1996
To: submit-linux-dev-net@ratatosk.yggdrasil.com
From: ecki@inka.de (Bernd Eckenfels)
Date: 16 Aug 1996 08:58:03 GMT
Al Longyear <longyear@netcom.com> wrote:
: However, this customer wants to dedicate the entire class-C network to
: this one computer for web services. This is ONE computer and 255
: IP addresses -- all on one network -- all on one computer.
It depends on your server-software. With the transparent proxy stuff in
recent Linux kernels it is rather easy to redirect a whole class-c net to a
server bound to INADDR_ANY or one 'physical' address. But if you use servers
which need to bind to all of the addresses, then it wont work with
redirection.
Just use
ipfwadm -I -a acc -P tcp -S0.0.0.0/0 -D10.0.0.0/8 80 -r 8080
this will rediect all TCP connections to ALL of the Class-A net to the port
8080 of you system. You simply need to install an WWW Server listening, and
you will get connections like:
2.ecki@cuzco:~> telnet 10.3.0.1 80
Trying 10.3.0.1...
Connected to 10.3.0.1.
Escape character is '^]'.
getpeername:
sin_family: 512
sin_port : 1789
sin_addr : 193.197.84.8
getsockname:
sin_family: 512
sin_port : 80
sin_addr : 10.3.0.1
Connection closed by foreign host.
(the above output is from: /etc/inetd.conf
8080 stream tcp nowait nobody /usr/sbin/tcpd /home/ecki/src/tp_test
)
/*
* tp_test.c test program for linux transparent proxies
*
* Copyright (c) 1996 Bernd Eckenfels, Germany
* This work is under the GPL.
*/
#include <stdlib.h>
#include <sys/socket.h>
#include <linux/in.h>
void dump_name(char *, struct sockaddr, int);
int main(int argc,char **argv) {
struct sockaddr name;
int namelen;
namelen = sizeof(name);
if (getpeername(0, &name, &namelen) < 0) {
perror("getpeername");
exit(1);
}
dump_name("getpeername",name,namelen);
namelen = sizeof(name);
if (getsockname(0, &name, &namelen) < 0) {
perror("getsockname");
exit(1);
}
dump_name("getsockname",name,namelen);
}
void dump_name(char *descr, struct sockaddr name, int namelen) {
struct sockaddr_in *sin;
sin=(struct sockaddr_in *)&name;
printf("%s:\n",descr);
printf(" sin_family: %d\n",ntohs(sin->sin_family));
printf(" sin_port : %d\n",ntohs(sin->sin_port));
printf(" sin_addr : %s\n",inet_ntoa(sin->sin_addr));
}
Note: my 386 has now 16581375 addresses with sl0 and lo :)
--
(OO) -- Bernd_Eckenfels@Wittumstrasse13.76646Bruchsal.de --
( .. ) ecki@lina.{inka.de,ka.sub.org} http://home.pages.de/~eckes/
o--o *plush* 2048/93600EFD eckes@irc +4972573817 *plush*
(O____O) If privacy is outlawed only Outlaws have privacy
