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https://issues.apache.org/jira/browse/JAMES-3788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17575095#comment-17575095
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Benoit Tellier commented on JAMES-3788:
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> I totally agree.
> What I wanted to point out: Even if you enable proxy support (e.g.
> smtpserver.xml) it is currently not possible to bypass the proxy, because the
> decoder throws an exception if you start talking to James (e.g. telnet on
> localhost:25 for debugging) because it requires the PROXY command.
Looks faire to me
As long as this behaviour is documented, and disabled by default this will not
be an issue IMO.
> I am going to wrap/extend the default HAProxyMessageDecoder class to not
> throw an exception in order to make it work without the PROXY command.
+1
> Support for HAProxy Proxy Protocol
> ----------------------------------
>
> Key: JAMES-3788
> URL: https://issues.apache.org/jira/browse/JAMES-3788
> Project: James Server
> Issue Type: New Feature
> Components: protocols
> Reporter: ouvtam
> Priority: Minor
>
> As proposed in the gitter channel I would like to add support for HAProxy's
> PROXY protocol
> ([https://www.haproxy.org/download/2.7/doc/proxy-protocol.txt|https://www.haproxy.org/download/2.7/doc/proxy-protocol.txt).]).
> This allows to run James behind HAProxy (i.e. load balancing multiple James
> instances). In order to properly support the proxy protocol James needs to
> parse the provided PROXY arguments from HAProxy (remote ip address, remote
> port etc.) and store it in the SMTPSession for further processing (e.g.
> DNSRBL check, Authorized Networks etc.). Otherwise James uses HAProxy's
> address (e.g. localhost) as remote address.
> For instance, HAProxy sends following line after connecting:
> {code:java}
> "PROXY TCP4 255.255.255.255 255.255.255.255 65535 65535\r\n" {code}
> Netty already provides a codec for HAProxy's protocol
> (io.netty.handler.codec.haproxy), so this can be implemented in the transport
> layer of James.
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