[lvs-users] Local Forwarding method - IP change?

Joseph Mack NA3T jmack at wm7d.net
Fri Aug 15 01:43:35 BST 2008


On Thu, 14 Aug 2008, David Coulson wrote:

> I have a number of IPVS rules configured like this.
>
> Prot LocalAddress:Port Scheduler Flags
>  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
> TCP  10.250.83.201:80 wrr
>  -> 169.254.1.20:80              Local   1      0          0
>  -> 169.254.1.21:80              Masq    1      0          0
>
> Everything works okay, however for connections where the forwarding
> method is 'Local', the resulting TCP connection is not modified and in
> the case above, we see connections still going to 10.250.83.201, rather
> than 169.254.1.20. Is this the intended method,

yes. the replies have to come from the VIP, so the 
connection from the client has to terminate in the VIP.

> and is there a work around so that the TCP connection is 
> modified such that the destination address of the TCP 
> connection is changed?

have a look at this.

http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.rewrite_ports.html#re-mapping_ports_with_iptables

however since your setup is working the way it's supposed 
to, it would be easier to use it that way, rather than 
trying to break it.

Joe
-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!




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