RPC over HTTPS reversed proxy configuration...

From: Derek Vincent (derek.vincent_at_clockwork.ca)
Date: 11/15/04


Date: Sun, 14 Nov 2004 20:52:47 -0500

I am trying to setup RPC over HTTPs via an apache reverse proxy.

I am using exchange 2003 sp1 on Windows Server 2003... I have a single
server with ADS, Exchange and IIS setup. I have a proper SSL cert from a
trusted vendor and IIS seems to be configured properly.

RPC over HTTPS is setup correctly and I can connect when on the local
network. I have used the rpcdiag switch in outlook to make sure I have
connected via HTTPS.

I have a linux FW that is forwarding traffic to a Apache 1.3 webserver
running on linux... I have apache setup to reverse proxy the requests for
OWA and OMA without issue to the exchange server. I am also proxying the
requests Rpc requests back to the exchange server. The apache server name is
webmail.domain.com and the exchange server is aliased internally to
webmail.domain.com.

When I test https://webmail.domain.com/rpc and login I get the 402.3 return
code and when I use the rpcping program I get a 200 code back externally.

I do not get an error message back from outlook even after letting it try to
connect for a couple hours... the rpcdiag screen just claims that it is
connecting... If I look in the apache server logs I see the request going to
the exchange server on 593, 6001, 6002, 6004 and many come back at 200 but a
number of them come back at 502 and 503.

Since I would imagine that things are setup on the exchange side correctly I
was hopping that someone else in the group has setup apache as a reverse
proxy and can lend some insight....

Cheers,

    Derek



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