Re: NAT and loopback

Hello Miguel,

   Alas, I have no idea on directly solving your problem, and
hope that the list's experienced veterans can help you better.
But I have an idea to this: "But I just want to do some local
L4 load balancing. Any idea on how that can be done? ".

   Sorry if my suggestion is too far-fetched - but in case
it doesn't work out with IPF, did you consider daemon-based
load-balancing?

   I'm sure it is not too difficult (although inefficient for
heavy/frequent loads) to make an inetd service which would
spawn tunnels (netcat's?) to one or another destination. This
can be dome perhaps via some one-liner script (load-balancing
to two targets i.e. by oddity of the current second of time).

   Some more efficient approach would be to find a tunneling
software which spawns LWP threads within one OS process.

   If this is some specific protocol (like SMTP, LDAP, HTTP)
there are many load-balancing proxies, good and bad. Protocol-
specific proxies are also beneficial in that they can usually
detect dead back-end servers and transparently direct the
clients to live servers.

   If anything else, some such proxies are available in source
(scripted or C/C++) and can become a basis for your protocol's
new load-balancer ;)

Hope this helps,
Jim

[email protected] пишет:
> Hi Phil
> 
> It's on AIX.
> But I just want to do some local L4 load balancing. Any idea on how that can be done? 
> 
> 
> Met vriendelijke groet
> Best regards
> Bien à vous
> 
> Miguel SANDERS
> ArcelorMittal Gent
> 
> UNIX Systems & Storage
> IT Supply Western Europe | John Kennedylaan 51
> B-9042 Gent
> 
> T +32 9 347 3538 | F +32 9 347 4901 | M +32478 805 023
> E [email protected]
> www.arcelormittal.com/gent
> 
> -----Oorspronkelijk bericht-----
> Van: [email protected] [mailto:[email protected]] Namens Phil Dibowitz
> Verzonden: maandag 25 mei 2009 22:16
> Aan: SANDERS Miguel
> CC: [email protected]
> Onderwerp: Re: NAT and loopback
> 
> [email protected] wrote:
>> Hi guys
>>
>> I would like to create a local L4 load balancing so that the following 
>> is true (the host has IP address 10.226.32.111):
>>
>> TCP connection to 127.0.0.1/port 1500 on the host gets redirected to 
>> 10.226.33.150/1500 the first time.
> 
> What OS? As far as I know, you can't do anything on the loopback interface in Solaris since it's not a real interface.
> 


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