On Mon, 25 Jun 2007, Matthew Smart wrote: > Thanks for the info. That approach seems workable, but complicated, so > I decided to pull an end run around. I disabled persistence, moved > sessions into mysql, and am relying on mysql's replication to ensure > that all servers have the session data.
People keep talking about sessions, but I don't know what they're doing. I assume the client has a cookie which the servers recognise (via mysql replication). Presumably the clients keep hitting different realservers as part of their session (which I guess has state - eg a shopping cart) and you have to pass the state info around too. Is this what you're doing? > This is probably a naive question, but is there any way for the director > to identify that a request is coming from a client behind a nat router? people asked this question a while ago, when users at home wanted to know whether their ISP could detect that the user had more than one computer using their connection if they were coming out of a NAT router. Similarly does Microsoft know that you have more than one computer installed with your one license CD. The short answer is no. From the outside world, it's hard for the ISP to know how many computers are behind the NAT router. The long answer is that it should be possible to watch the ports that the calls are coming from, but it's a bit of work and no-one seems to do it (and ISP's have given up on limiting the number of computers you can have at home). The machines behind the NAT router call from high ports in order. So say you're websurfing and you've just fired up the homecomputer, The first call to VIP:80 will come from CIP:1025. When that tcpip connection is closed down, the next call to VIP:80 will come from CIP:1026 etc. These calls get nat'ed into a similar monotonic series of ports from the NAT router (with 2.2 linux starting somewhere up near 40,000, but now starting with port 1025). Originally there was a separate range reserved for each client (I think), allowing the ISP to watch for multiple clients behind the nat router. Now I think theirs only one range (to stop this pattern being observed). Joe -- Joseph Mack NA3T EME(B,D), FM05lw North Carolina jmack (at) wm7d (dot) net - azimuthal equidistant map generator at http://www.wm7d.net/azproj.shtml Homepage http://www.austintek.com/ It's GNU/Linux! _______________________________________________ LinuxVirtualServer.org mailing list - [email protected] Send requests to [EMAIL PROTECTED] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
