Re: running more than one server with one IP address

2005-08-30 Thread Rein Kadastik

Well, you must then forward the BIND ports (port 53) also to host B.

Rein

Jared Hall wrote:


On 8/28/05, Rein Kadastik [EMAIL PROTECTED] wrote:
 


You create a single gateway for all the services and then use the
portforwarding. This way you can forward port 25 to host A, 80 to host B
and so on. The hosts A and B have to be behind this gateway machine.
Much the same way LAN gateways are done. If you have some more detailed
questions, just drop a line.

if I am port forwarding 80 to host B through a semi-managed switch (a 
   

netgear VPN which does not support classical routing) is it possible to run 
BIND on host B?


Thanks

Jared
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Re: running more than one server with one IP address

2005-08-29 Thread Norberto Meijome

Bart Silverstrim wrote:


If you try this with an internal system, you're probably going to run 
into issues with ARP routing and collisions.  You'd have to place your 
machines in their own VLAN and have one internal IP assigned to the 
interface and still use some kind of redirection to the VLAN 
servers...that's quite a bit of work for most setups, though.


How about using CARP , so you'd have a virtual ARP which is actually 
several servers (either in fallback mode or round robin mode, if that 
works on fbsd - i think it does in openbsd)

B

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Re: running more than one server with one IP address

2005-08-29 Thread Jared Hall
On 8/28/05, Rein Kadastik [EMAIL PROTECTED] wrote:
 
 You create a single gateway for all the services and then use the
 portforwarding. This way you can forward port 25 to host A, 80 to host B
 and so on. The hosts A and B have to be behind this gateway machine.
 Much the same way LAN gateways are done. If you have some more detailed
 questions, just drop a line.
 
 if I am port forwarding 80 to host B through a semi-managed switch (a 
netgear VPN which does not support classical routing) is it possible to run 
BIND on host B?

Thanks

Jared
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running more than one server with one IP address

2005-08-28 Thread David Banning
Is it possible to run more than one server(machine) with one IP
address? I have so many different server-applications running on my machine I
would like to divide them up.

Maybe using one machine email only, or use one for certain websites,
and another for other websites. This would also allow me to take-down
one machines for maintenance when necessary, or use one machine for
more troubleshooting.

Wondering if someone could even direct me to the terminology that I am 
looking for so I can google it.

-- 
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Re: running more than one server with one IP address

2005-08-28 Thread Rein Kadastik
You create a single gateway for all the services and then use the 
portforwarding. This way you can forward port 25 to host A, 80 to host B 
and so on. The hosts A and B have to be behind this gateway machine. 
Much the same way LAN gateways are done. If you have some more detailed 
questions, just drop a line.


David Banning wrote:


Is it possible to run more than one server(machine) with one IP
address? I have so many different server-applications running on my machine I
would like to divide them up.

Maybe using one machine email only, or use one for certain websites,
and another for other websites. This would also allow me to take-down
one machines for maintenance when necessary, or use one machine for
more troubleshooting.

Wondering if someone could even direct me to the terminology that I am 
looking for so I can google it.


 



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Re: running more than one server with one IP address

2005-08-28 Thread Rein Kadastik
Actually for forwarding incoming ports, the NAT part is unneccessary 
although I have used natd for creating the port forwarding itself.


David Banning wrote:


Is it possible to run more than one server(machine) with one IP
address? I have so many different server-applications running on my machine I
would like to divide them up.

Maybe using one machine email only, or use one for certain websites,
and another for other websites. This would also allow me to take-down
one machines for maintenance when necessary, or use one machine for
more troubleshooting.

Wondering if someone could even direct me to the terminology that I am 
looking for so I can google it.


 



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Re: running more than one server with one IP address

2005-08-28 Thread Rein Kadastik
And about the terminology and technologies: look for port-forwarding, 
NAT (short for Network Address Translation), natd. Also read about 
seting FreeBSD as a gateway.


David Banning wrote:


Is it possible to run more than one server(machine) with one IP
address? I have so many different server-applications running on my machine I
would like to divide them up.

Maybe using one machine email only, or use one for certain websites,
and another for other websites. This would also allow me to take-down
one machines for maintenance when necessary, or use one machine for
more troubleshooting.

Wondering if someone could even direct me to the terminology that I am 
looking for so I can google it.


 



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Re: running more than one server with one IP address

2005-08-28 Thread dgmm
On Sunday 28 August 2005 19:28, David Banning wrote:
 Is it possible to run more than one server(machine) with one IP
 address? I have so many different server-applications running on my machine
 I would like to divide them up.

 Maybe using one machine email only, or use one for certain websites,
 and another for other websites. This would also allow me to take-down
 one machines for maintenance when necessary, or use one machine for
 more troubleshooting.

I don't think you will be able to run different web sites from different 
machines if you only have one IP address (at least not easily).  You can run 
different services on different machines though.

 Wondering if someone could even direct me to the terminology that I am
 looking for so I can google it.

The terms you are looking for are port forwarding and Network Address 
Translation.

I'm sure others can elaborate (or tell me I'm wrong) ;-)

-- 
Dave
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Re: running more than one server with one IP address

2005-08-28 Thread Bart Silverstrim


On Aug 28, 2005, at 2:28 PM, David Banning wrote:


Is it possible to run more than one server(machine) with one IP
address? I have so many different server-applications running on my 
machine I

would like to divide them up.

Maybe using one machine email only, or use one for certain websites,
and another for other websites. This would also allow me to take-down
one machines for maintenance when necessary, or use one machine for
more troubleshooting.

Wondering if someone could even direct me to the terminology that I am
looking for so I can google it.


The only way I know of doing this is if you have one externally visible 
IP and you're trying to break up services among systems on the internal 
network.  On your router, you'd use port forwarding to redirect 
individual ports to each machine inside your network; i.e., tell the 
router to forward port 25 to your SMTP server, port 80 to your internal 
web server, and port 22 to your internal SSH server whenever requests 
to those port hit IP WWW.XXX.YYY.ZZZ.


I would suppose you'd google for information about NAT and port 
forwarding on routers.


If you try this with an internal system, you're probably going to run 
into issues with ARP routing and collisions.  You'd have to place your 
machines in their own VLAN and have one internal IP assigned to the 
interface and still use some kind of redirection to the VLAN 
servers...that's quite a bit of work for most setups, though.


You might be better off messing with your internal DNS so people can 
just go to www.mynetwork.com or smtp.mynetwork.com and have your DNS 
server hand out the proper IP of your server(s).


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