Re: Problems sending mail to yahoo?
Is it just us or are there general problems with sending email to yahoo in the past few weeks? Our queues to them are backed up though they drain slowly. I have ~3,000 messages (from today) stuck with this 421-ts01 problem. Mostly it's our "campus mail bag" which is a digest that goes out to students (many of whom forward their campus mail off-site). Interestingly, it's only on the newest of our outbound SMTP boxes that's affected. The others (which have been in use for some years) still work just fine. Our SPF record is a permissive 'ptr ~all', btw. Cheers, Michael Holstein Cleveland State University
Re: Bandwidth issues in the Sprint network
Does anyone know of bootable Linux CD with iperf on it? Knoppix STD (security tools distro) http://www.knoppix-std.org/tools.html Cheers, Michael Holstein Cleveland State University
Re: Hotmail NOC Contact
We have identified that messages from your IP (209.255.20.17) are being blocked based on the recommendations of the Symantec Brightmail as traffic/e-mail originating from your IP matched characteristics of recent spam attacks from compromised, or 'zombie' infected, machines. Do you rewrite/forward mail? .. we're a .edu, and allow our students to forward to hotmail/yahoo/whatever .. so when a phishing/malware sweep hits campus, about 60% is reflected back onto the Internet (sometimes our Anticrap gateway catches it, sometimes not). Because of the way addresses are re-written, it looks like it came from us. After reviewing the information you provided, we have taken steps to remove the block. This change should take effect within the next 24-48 hours. They're true to their word here .. we got ourselves de-listed in ~12hrs. Cheers, Michael Holstein Cleveland State University
Re: rack power question
Mineral oil? I'm not sure about the non-flammable part though. Not all oils burn but I'm not sure if mineral oil is one of them. It is used for immersion cooling though. It burns quite well .. http://video.aol.com/video-detail/transformer-explosion/1599831229 Cheers, Michael Holstein Cleveland State University
Re: default routes question or any way to do the rebundant
ls it possible to have 2 default routes? No .. not in the literal sense. or how can I do the rebundant when the route is still working either eth1 or eth2 down? What you do in this case is create an equal weighted preference for each of the two routes, along with tests to ensure each link is up and modify your pf rules accordingly. example1 (this is for netfilter) : http://lartc.org/howto/lartc.rpdb.multiple-links.html example2 (freebsd specific) : http://www.freebsddiary.org/phorum/read.php?f=6&i=79&t=79 As others have mentioned, this is a question for the various FreeBSD mailing lists .. Cheers, Michael Holstein Cleveland State University
Re: mtu mis-match
but I still don't know why mtu can cause this problem Blocking ICMP (specifically type 3,code 4) can also cause this .. because it breaks path MTU discovery (pmtud). The first part of this doc helps explain the issue : http://www.cisco.com/warp/public/105/pmtud_ipfrag.html Cheers, Michael Holstein Cleveland State University
Re: An Attempt at Economically Rational Pricing: Time Warner Trial
Some restuarants are all-you-can-eat and others are pay by portion. None of the nice ones. Then again, the nicer restaurants have a portion size that reflects the higher cost. The problem is the inability of the physical media in TWC's case (coax) to support multiple simultaneous users. They've held off infrastructure upgrades to the point where they really can't offer "unlimited" bandwidth. TWC also wants to collect on their "unlimited" package, but only to the 95% of the users that don't really use it, and it appears they don't see working to accommodate the other 5% as cost-effective. My guess is the market will work this out. As soon as it's implemented, you'll see AT&T commercials in that town slamming cable and saying how DSL is "really unlimited". Cheers, Michael Holstein Cleveland State University
