My exact setup is this: We have one Win 2000 Server, hosting web, ftp and mail services. It has the ip 172.26.13.34 which is mapped to the external ip 213.187.208.241 by the ISP (they're using a cisco pix firewall). There is also a number of workstations at the office mapped to that ip. We have purchased 256 kbit of bandwidth for that ip which the ISP limits using some kind of filter in their firewall.
We are also running a terminal services setup for a few external clients that need to access applications on our server. Now, as the bandwidth use approaches the purchased 256 kbit, latency increases and packets start getting dropped. Terminal services doesn't work very well when latency increases. There will be a delay in typing, using menus and clicking buttons. Because of the latency when transferring large files we have purchased an additional 128 kbit external bandwidth. We dedicate that to our clients accessing the terminal services and charge them for that. These separate 128 kbit are mapped to a different internal ip - 172.26.13.35. Then I have assigned that ip too to the server, making sure the www, ftp, mail and other bulk transfer services are bound to the first ip, while the terminal services are bound to the second ip. This makes sure that latency will be low for terminal services sessions even when transferring large files over www, ftp or mail, assuming that those services use the right ip. So far I haven't had many complaints from our clients that latency gets high even though xmail might use the bandwidth supposed to be dedicated for terminal services. That is probably because most of the traffic to the mail server is mail from external users being delivered and pop3 fetches of mail. The only outbound traffic from it for the mail generated locally at that office, outside people use their own isps when delivering mail. Still, it would be cleaner if xmail could be bound to a specific ip for sending mail too. Now I have explained exactly my situation to you. If you see a different solution to it, please tell me. Andreas ----- Original Message ----- From: "Davide Libenzi" <[EMAIL PROTECTED]> To: "XMail mailing list" <[EMAIL PROTECTED]> Sent: Wednesday, March 27, 2002 7:05 PM Subject: [xmail] Re: SMAIL and binding ip > > What's a very valid reason in doing such a thing ? > I mean something that you cannot achieve in other ways ( > netfilter/ipchains & Co. ). > - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
