Todd Lyons writes:
Hello Sam,There is a fairly new proposed proxy mechanism called Proxy Protocol. Like all proxy schemes, various ip/connection structs are rewritten in the proxied application to reflect the actual source ip that's connecting to the proxy. This particular Proxy Protocol proposal is very simple (because it's very rigid and you can exclude anything that doesn't exactly fit the spec). The specifications: http://haproxy.1wt.eu/download/1.5/doc/proxy-protocol.txt Would this be something you would consider doing for Courier? In my specific case, I use only Courier-IMAP, but this could be useful for all parts of the Courier suite.
I don't have any objections, in principle, however Courier-IMAP already has built-in proxy support that's superior to what this does. With proxying enabled, and virtual accounts, an additional account parameter specifies the mailbox's host to proxy the connection to.
See http://www.courier-mta.org/imap/README.proxy.htmlThe only thing this doesn't do is forward the client's IP address, for logging purposes, however this can be easily added.
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