August 2003 - Test - lists.nanog.org

RE: Server Redundancy
by Austad, Jay 07 Aug '03

07 Aug '03

If the servers are in two separate locations, like two datacenters on either side of the country, you are stuck with DNS-based load balancing. Like others have mentioned, Cisco, F5 and others have products which will handle this for you and take into account some other factors when directing traffic. DNS load balancing works quite well, I've used the F5 BigIP and 3dns extensively, and the Foundry ServerIron (which is fairly cheap). A little more detail into what you are trying to do would … [View More]help. The most common setup with this is to have multiple datacenters, and each datacenter has a cluster of identical servers behind something like a BigIP. The traffic is load balanced at that level, but your Global load balancer which hands out DNS communicates with the local guy to figure out what the current traffic ratio is and modifys its dns replys accordingly. There used to be a free one for linux called Eddie, which looked quite robust. I think it was eddieware.org or eddieware.com. There is also the linux virtual server project, but I don't believe it has support for Global load balancing, only local. As a side note, I've used Cisco's CSS, F5's stuff, Alteon, and Foundry. Out of all of them that I've used, the Foundry had the least problems and had a nicely structured config. I would recommend the CSS, but it seems to have quite a few bugs in the code that still need to be worked out, but the support for SSL acceleration is nice. F5... I used to really like F5. In fact, I was one of their beta sites back in 1999 and 2000. After some problems with code that "broke" things, we discontinued the beta program with them. Shortly after, their new releases were getting worse and worse, their support seemed unwilling to help (for almost $100k a year in support, you'd think they would care), so I switched to Foundry. An insider over at F5 told me that most of the people who had written the original code back in 1999/2000 were all gone, and most of the problems were a result of the new people not yet wrapping their heads around the code. This was about 2 years ago, so it's possible they've figured out how everything is put together and it's better now. For awhile though, it was quite bad. Feature-wise, F5 has more features than any of the other ones, Cisco CSS comes in a somewhat distant second place. For most people, any of the above will suffice and most of the features available in F5 and Cisco are just nice-to-have's and not a requirement. -jay > -----Original Message----- > From: Gerald [mailto:gcoon@inch.com] > Sent: Wednesday, August 06, 2003 1:12 PM > To: Jason Greenberg > Cc: nanog(a)merit.edu > Subject: Re: Server Redundancy > > > > On Wed, 6 Aug 2003, Jason Greenberg wrote: > > > > > Can I have some suggestions on how to load balance servers > that are on > > seperate IP blocks? Is there any way to perform translation at this > > level? Exclude DNS based balancing please... > > vrrp on FreeBSD is supposed to be a free solution to allow machines to > watch each other and take over IP addressing if connectivity is lost. > Depending on how remote your IP blocks are and how much > control you have > over the routing equipment in between, your only choice may be a > commercial solution. > > http://www.bsdshell.net/hut_vrrpimpl.html > > I've not used it, and the documentation is currently in French. > > The HUT project also has FreeBSD load balancing software for > free that is > supposed to function like F5/Alteon/Cisco LB. > > I've maintained the Cisco CS 1100 (when it was Arrowpoint) in > production. > You could VLAN remote machines into what you want to do on > that. I think > that equipment has changed quite a bit though since Cisco > bought them and > my experience is over a year old. > > G > [View Less]

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New Trojan
by netadm 07 Aug '03

07 Aug '03

Anyone having any fallout from: http://www.eweek.com/article2/0,3959,1130765,00.asp <http://www.eweek.com/article2/0,3959,1130765,00.asp>

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RE: Server Redundancy
by Austad, Jay 07 Aug '03

07 Aug '03

> I've used them all fairly heavily, except the Foundry gear. > Alteon's my > personal fave. Biggest problem with the F5: hard drive. In my book, > that means you instantly need two, doubling the price. Same thing with the Cisco CSS. Even without a hard drive, you should have 2 of them anyway. How do you plan to do software upgrades or other certain types of maintenance without an outage if you don't have a second one? I've seen them flake out too, either by not passing … [View More]

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RE: Server Redundancy
by Don Mills 07 Aug '03

07 Aug '03

We've been using the Linux Virtual Server project (which a previous poster mentioned) to do load balancing (locally) on web based apps, pop3, smtp and now iptable firewalls. It scales well, has multiple lb algorithms (wlc, rr, lc, wrr, etc.) and even multicasts out the connection info if you want so you can set up a bank of redundant lb's. It can work w/ NAT or ip tunneling or direct routing so it might be able to do global load balancing depending on the setup. We have a 10000+ user … [View More]

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WANTED: ISPs with DDoS defense solutions
by Lane Patterson 07 Aug '03

07 Aug '03

We have some DDoS-sensitive customers asking us to refer them to the best ISPs for "in-the-core" DDoS defense. Other than UUnet (hi Chris!) and MFN, I'm not aware of any ISPs in North America developing a reputation for consistent DDoS defense. Could folks contact me either off-list or on-list? It seems that large content providers and Tier2/3 bandwidth buyers would do well to collaborate on group RFP's for this type of thing to send the message to ISPs it is something to invest in (dare I … [View More]

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dcom worm released
by Len Rose 07 Aug '03

07 Aug '03

It seems to be true.. I haven't seen any code yet but-- http://lists.netsys.com/pipermail/full-disclosure/2003-August/007717.html

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Re: When Security Guards Attack (was: clearblue part deux)
by Eric Brunner-Williams in Portland Maine 07 Aug '03

07 Aug '03

> ... tried to silence the door audible alarm Didn't it have battery backup? Inquiring minds want to know.

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Verizon 140 West Street CO
by Mike Moglin 07 Aug '03

07 Aug '03

Anyone else hearing about a major outage at the Verizon 140 West Street CO caused by flooding or a major equipment failure? -Mike

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WHO'S SPAMMING YOU? Top 60 Proxy-Hijacker-Friendly Nets 2003-08-06
by Ronald F. Guilmette 07 Aug '03

07 Aug '03

What follows below is a volume-ranked list of the most prolific /24 IP address blocks with respect to open proxy hijacking activity over the past 2 days. These ranking are based on data collected by my extensive open proxy honeypot network for the 48 hour period from 5 PM Pacific Daylight Time, August 4th, 2003 through 5 PM Pacific Daylight Time August 6th, 2003. Some brief commentary material follows the list. If you or someone you know owns or operates any of the networks listed below, … [View More]

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Anyone from geocities or yahoo on the list?
by Drew Weaver 07 Aug '03

07 Aug '03

NT -Drew

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