Date: 20 Aug 2005 10:29:18 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: Ovidiu Ene <ovidiue@unixware.ro> Cc: freebsd-questions@freebsd.org Subject: Re: Load Balancing - Nice and Easy - no BGP, no isp help. Message-ID: <444q9k7kch.fsf@be-well.ilk.org> In-Reply-To: <4305B5BB.90705@unixware.ro> References: <4305B5BB.90705@unixware.ro>
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Ovidiu Ene <ovidiue@unixware.ro> writes: > Hello friends > > I am trying for a while to make a load balancer under FreeBSD > > I would have: 3 nics, ISP1 nic, ISP2 nic and LAN nic. > What i've done until now, after reading lots of posts, googling for a while: > > - I've suceeded to setup an outgoing load balancer with pf, it works > perfectly but only for outgoing traffic; > - I've noticed that almost everybody thing that it cannot be done load > balancing with BSD of incoming and outgoing without help of that both > ISP (BGP) > - I find hardware with proprietary OS/firmware that can do load > balancing without support of ISP. Some are cheap (300$), but at review > does not know to load balance incoming traffic (break functionality of > some pages accessed, since some of load is on one interface, some of > other, works corectly only if i setup to come some type of traffic on > one interface, some of other (for example trafic via port 80 on one > nic, ftp traffic on the other), also are expensive hardware load > balancers (over 1000$) that... i am asking myself how it works, > without help of isp. > - I've found somewhere that it can be done load balancing but not with > one box with that 3 nics, but with 3 boxex, because (that article i am > "insipring" said that every box has just one routing table) because > can be created a virtual server that with handle routes from that 2 > boxes. > - People told me that in Linux load balancing cand be done, 3 nics, 2 > external, one to Lan, with iptables. Here is a short article: > http://linux.com.lb/wiki/index.pl?node=Load%20Balancing%20Across%20Multiple%20Links > > So, my question is, if some people made it (in expensive hardware that > did have the same OS, maybe even FreeBSD, and proprietary algorythms) > and in Linux it can be done (people told me, i've read articles and > also so it here, where i live) why it cannot be done under FreeBSD? > I guess it can be done, I want to do it with FreeBSD, and want to > obtain same performances as with Linux. The only specific example you gave was the Linux one. And that one *is* doing load balancing on the outgoing side. I doubt it's very different from what you did with pf. > What is your opinion about that? What should I do? Anybody suceed in > making load balancing work that way? I don't believe anyone has. Or can, for that matter. Aside from choosing addresses for outgoing connections, you have no control over what incoming link a peer outside your network will use to communicate with you. Unless the upstream providers are cooperating, of course.
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