Dnia 2010-01-07, czw o godzinie 11:29 +0800, Joe P.H. Chiang pisze: > Hi All > > I was wondering if the HA Proxy's Balancing Mechanism be called a NAT > Mechanism, because it's masking the servers' IP addresses, and then > route the traffic to the location. > > > > because i was just discussing with my colleague, and my argument is > that: it's only a proxy which in between two pc there are a surrogate > pc to tell where the traffic's destination is. > > > -- > Thanks, > Joe >
Well, NAT is "get packet, rewrite IP headers, send packet somewhere". In haproxy it's "get packet, analyze headers, change headers, send it to backend server, rewrite/analyze response, send it back to client, then maintain connection between those 2" Basically, NAT is on level 3, proxy is on level 7. LVS(http://www.linuxvirtualserver.org/) is basically NAT in one if its modes. HAProxy is not "Network Address Translator" tho it can be used to replace it in some cases. -- Mariusz Gronczewski (XANi) <[email protected]> GnuPG: 0xEA8ACE64 http://devrandom.pl
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