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Dynamic address space in SORBS causes mail rejection
by Craig Box 15 Jun '04

15 Jun '04

Hi everyone. While we're on the subject of mail rejections, I look after a couple of sites on a TelstraClear Tempest connections, both with IP addresses on 203.97.48.0/21. Unfortunately, spam DNS blacklist SORBS (http://www.dnsbl.au.sorbs.net/) list them as being on Dynamic IP space: 203.97.48.x found in Dynamic IP Space (Cable, DSL & Dial Ups) Address or Block: 203.97.48.0 / 21 Information: Dynamic IP address, use your ISPs mail server ...and as such a number of sites (a number growing by about one a day, just the ones I get told about) are blocking mail based on the SORBS listing. Some months ago I got in touch with TC's faults desk and they claim to have emailled off to SORBS to have this reclassified. Nothing changed, so I got in touch with our local tech contact at TC; he said he'd fire it off to the ISP guys but I've not heard back from him either. I've asked around about this and the best suggestions are "you're an ISP customer, you should be smarthosting through an ISP mail server." Problems with this include the fact that we no longer have any control over retry/routing/any of the niceties of controlling your own outbound SMTP; the fact that clear.net.nz mailservers are currently being eaten by Zafi and mail delivery will probably slow down; and the fact that we "just plain shouldn't have to." We have a hosted mail server of our own that we could use as a smarthost, however it will be a significant increase in load on this machine where we have a perfectly good mail server sitting at the clients site. I agree completely about customers not running mail service on dial-up lines, but a Tempest connection with a static IP address is a business service, not a 56k modem with an infected Windows box behind it. I'm not sure where to go from here. It's possible that if I ask TC to set the PTR for each affected customer to smtp.$CLIENT and then manually request that it's removed from SORBS, it may be done. Their FAQ (http://www.dnsbl.au.sorbs.net/DUL-FAQ.html) suggests I'm more likely to be asked to have my ISP ask. I'd like to see TC deal to this, perhaps by putting more information in the WHOIS db about what space is static and what is dynamic, and possibly changing PTR records appropriately. According to the DNSBL faq, the contact listed in the RIR can have it changed - it would be really nice if this problem could go away. If there are any other suggestions that anyone has about how to deal with this problem, please let me know. Regards, Craig Box Phone 07 957 2653 IT Partners Ltd Fax 07 957 2659 PO Box 9361 Mobile 021 475 869 Hamilton, New Zealand _________________________________________________________________ #include <standard-disclaimer.h> _________________________________________________________________

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Map/schematic over NZ Internet connectivity?
by Juha Saarinen 15 Jun '04

15 Jun '04

Has the NZ Internet connectivity been mapped out yet? Maybe I'm not googling right, but I can't find any resource which lists national and international connectivity for New Zealand. -- Juha

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RE: [nznog] TelstraClear Inhternational / National Traffic billing
by Donald Neal 15 Jun '04

15 Jun '04

> On Tue, 15 Jun 2004, Joe Abley wrote: > > > On 15 Jun 2004, at 08:22, Drew Broadley wrote: > > > > > The end is nigh. > > > > The doomsaying is all very dramatic, but where's the reasoning? > > > > If it suddenly costs money to talk to networks which are > customers of > > TCL, it surely makes *more* sense to peer with them > directly, not less. Indeed. Peering by US content providers is one of the big changes identified in http://www.nanog.org/mtg-0405/pdf/norton.pdf . Perhaps sadly, one of the possible futures for the US identified by the author in answer to questions about his presentation at the most recent NANOG was the New Zealand model, in which charges aren't made for national traffic. - Donald Neal Donald Neal | Bubble and squeak Technical Specialist | - Boiled mouse. Operations Engineering | [Martin Neal] Integration & Services Division +----------------------- Alcatel NZ Ltd - Telecom's network operations manager ------------------------------------------------------------------------------ "This communication, including any attachments, is confidential. If you are not the intended recipient, you should not read it - please contact me immediately, destroy it, and do not copy or use any part of this communication or disclose anything about it. Thank you. Please note that this communication does not designate an information system for the purposes of the Electronic Transactions Act 2002." ------------------------------------------------------------------------------

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TelstraClear Inhternational / National Traffic billing
by neil gardner 15 Jun '04

15 Jun '04

Hi guys - I just spent 5 minutes talking to Telstra in between 45 minutes of working while on hold... The question I asked was: If TelstraClear go ahead with cutting the links to a couple of big national network access points (I was speaking to a non-tech), what will happen to the national / international traffic billing. This person had zero clue but came back ten minutes later and stated she'd been talking to someone that knew exactly what I was talking about. His statement was that "Shortly the International / National traffic distinction will be phased out and there will be only one class of traffic. The cost will be similar to the current International rate. But don't worry since it only matters if you go over your limit" (The lady relayed his comment and that's as close to a direct quote as I can recall) Does this mean that TelstraClear are going to adopt the Telecom Jetstream traffic charging model? Anyone in the know care to correct me if I was given false information by junior Telstra Staff? Or, horribly, was this statement correct? (I specifically wanted to know what would happen to my national / international charging if TelstraClear cut their peering, and it appears they do in fact have a plan to make sure the consumer experiences no confusion over what's National or International traffic) Cheers - Neil G NOTICE: This message contains privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that you must not disseminate, copy or take any action in reliance on it. If you have received this message in error please notify Allied Telesyn Research Ltd immediately. Any views expressed in this message are those of the individual sender, except where the sender has the authority to issue and specifically states them to be the views of Allied Telesyn Research.

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Re: [nznog] SMTP Servers and Reverse DNS Lookup
by Juha Saarinen 14 Jun '04

14 Jun '04

neil gardner wrote: > Um, no false positives? doesn't that mean you manually inspect all your > logs of dropped connections? Doesn't, by extension, that mean you might > as well let all the stuff through and check them at the client end? :-) Yes, I do check the logs, which is a lot easier than it may appear. No, it doesn't mean I might as well let the stuff through... -- Juha

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Re: [nznog] SMTP Servers and Reverse DNS Lookup
by neil gardner 14 Jun '04

14 Jun '04

Um, no false positives? doesn't that mean you manually inspect all your logs of dropped connections? Doesn't, by extension, that mean you might as well let all the stuff through and check them at the client end? :-) Cheers - N >>> Juha Saarinen <juha(a)saarinen.org> 15/06/2004 3:30:14 p.m. >>> neil gardner wrote: > http://www.cs.niu.edu/~rickert/cf/bad-ehlo.html > > Decent understandable writeup of the "You should send the right info" > and "Don't drop email if you get the wrong info" arguments... ... and having said all that, I admit to dropping some some messages based on HELOs. Mainly viruses and spamware connections, with no false positives yet. Touch wood. -- Juha NOTICE: This message contains privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that you must not disseminate, copy or take any action in reliance on it. If you have received this message in error please notify Allied Telesyn Research Ltd immediately. Any views expressed in this message are those of the individual sender, except where the sender has the authority to issue and specifically states them to be the views of Allied Telesyn Research.

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Re: [nznog] SMTP Servers and Reverse DNS Lookup
by neil gardner 14 Jun '04

14 Jun '04

http://www.cs.niu.edu/~rickert/cf/bad-ehlo.html Decent understandable writeup of the "You should send the right info" and "Don't drop email if you get the wrong info" arguments... Cheers - N. >>> Juha Saarinen <juha(a)saarinen.org> 15/06/2004 2:56:14 p.m. >>> Regan Murphy wrote: > Is this sort of configuration becoming standard for organistions? Some admins think it's BOFH to do stuff like that, in the mistaken belief that it's RFC-compliant. It's a bit like fundamentalists interpreting various religious scriptures, but if they want to drop legitimate email, their choice I say. -- Juha _______________________________________________ NZNOG mailing list NZNOG(a)list.waikato.ac.nz http://list.waikato.ac.nz/mailman/listinfo/nznog NOTICE: This message contains privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that you must not disseminate, copy or take any action in reliance on it. If you have received this message in error please notify Allied Telesyn Research Ltd immediately. Any views expressed in this message are those of the individual sender, except where the sender has the authority to issue and specifically states them to be the views of Allied Telesyn Research.

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SMTP Servers and Reverse DNS Lookup
by Regan Murphy 14 Jun '04

14 Jun '04

I was having problems sending mail to an organisation and eventually worked out that the host name and reverse dns entry did not match and therefore mail transfer was refused: ------- 220 mail.xxxbar.co.nz ESMTP NetIQ MailMarshal (v5.5.5.8) Ready ehlo hellmouth.oaxxxsystems.co.nz 554 No SMTP service here ------- As soon as I corrected my server to use the correct host name to match the reverse (vampire.oaxxxsystems.co.nz) then mail was allowed to go through. I would assume this was a recent change by the receiving organisation as I have not had problems sending them emails before. Is this sort of configuration becoming standard for organistions? I would expect that may create problems for smaller organisations sending email directly from their in-house hosted mail server for which they have no control over reverse-dns entries. -- Regards, Regan

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RE: [nznog] TelstraClear Inhternational / National Traffic billing
by Craig Spiers 14 Jun '04

14 Jun '04

Well.. You could get a link to both, but the only real benefit would be splitting the cost between two (probably slightly more expensive this way as a separate circuit is needed for both - generally cheaper to upgrade a 10meg to 100meg than it is to install 2x 10meg eg. one from each telco) However, you would have a shorter data path.. As with two circuits, the data goes direct to both carriers.. With just one circuit, data to clear, goes via telecom.. (provided they keep the peering between them). -----Original Message----- From: jfp [mailto:jfp(a)clearfield.com] Sent: Tuesday, 15 June 2004 12:16 p.m. To: 'Craig Spiers' Subject: RE: [nznog] TelstraClear Inhternational / National Traffic billing > They shouldn't be connected to the internet at all! They should be > shot in the foot for having such poor routing :) > > NZ > US > NZ :) Not being in the ISP business, but a client of ISP's, could you explain that one to me. I thought the whole point of peering at the APE and WIX was that you did not need to get point to point link to other providers. Why do you NEED to get a link to one of the telco's? jfp. ------------------------------------------------------------------------ Jean-Francois Pirus <jfp(a)clearfield.com> Clearfield Software Ltd Phone (+64-9) 358 2081 4th Floor 8-10 Whitaker Place Fax (+64-9) 358 2083 P O Box 2348 Auckland, New Zealand ------------------------------------------------------------------------

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Re: Map/schematic over NZ Internet connectivity?
by Kerry Milestone 13 Jun '04

13 Jun '04

The National Library of New Zealand has been given a lot! of money, i expect they will have a good map soon......... http://www.beehive.govt.nz/ViewDocument.cfm?DocumentID=19882 And an older National Business Review article: http://www.nbr.co.nz/home/column_article.asp?id=1978&cid=1&cname=Media Maybe some of it can be spent on peering networks together to help with the flow of _all_ websites ending in .nz to be harvested daily by the NatLib... This task is now part of the National Library Bill and can be thought of being the same as the Legal Deposit legislation.

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