On Mon, 2010-03-01 at 15:47 +0100, Ilja Beeskow wrote: > Hello @ll > > I have a little problem with postfix 2.5, trendmicro viruswall and an old > exchange 2k behind it. Perhaps somebody could give me a hint because I'm > really confused after some days of trying different things. > > for incoming mail everything is clear: > > relay_domains and transport_maps, tmvw as a content_filter do the job! > > Internet DMZ Intranet > -------- --------- ---------- > tmvw (as cf) > 10025 > ^ | > | v 10026 > smtp (25)-> pf (25)-> exchange2k > > outgoing mail should be handled a litte different: > > Internet DMZ Intranet > -------- --------- ---------- > tmvw (as cf) <---- (10025) > | (10025) | > (10026)| ^ | not possible! > v | | > MX <-(25) pf pf-sec <-(25) ex2k > > Because of the fact the ex2k was migrated from 5.5 we actually have the > problem that ex2k is not configurable to use any other port than 25. This > breaks the design of tmvw. > > My idea is a second smtp-process (I have two IPs) like this > > master.cf > 192.168.1.3:25 inet n - n - - smtpd > 192.168.1.4:25 inet n - n - - smtpd > > What I want ist a forwarding process getting it's mail on port 25 and > forwarding it to port 10025 of tmvw. tmvw should reinject on port 10026 of > the > first (outbound) smtpd process .
I think it is easier to use a transparent proxy which redirects incoming connections to port 25 to localhost port 10025. Check your firewall documentation for your platform. Ipchains of ipfilter or ... > > What I think to know is that my second process has to have set this > > 192.168.1.4:25 inet n - n - - smtpd > -o myhostname=gw.mydomain.local > -o relayhost=smtp:[127.0.0.1]:10025 > -o content_filter= > -o smtpd_use_tls=no > -o mynetworks=192.168.0.0/24 > -o mydestination= > -o relay_transport= > > Is this possible and why does it not forward to port 10025? Do you have a > source for me dealing with a similar problem? > > > with kind regards > > Ilja Beeskow >
