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Cranky Geeks
by Stanislav Sinyagin 12 Sep '08

12 Sep '08

If you haven't seen it yet, it's worth checking out: http://www.crankygeeks.com/ it's a quite interesting tech talk show. The guys are discussing various interesting topics, sometimes in quite sarcastic way :) In yesterday's show one of the guests is Whitfield Diffie, one of the names in Diffie-Hellman key exchange protocol :)

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Re: [swinog] RBL's (again) (Was: Anyone from Green here?)
by Stanislav Sinyagin 11 Sep '08

11 Sep '08

actually about a year and a half ago there was a new spambot which was re-sending the message after a temporary reject. But it did it precisely in 4 minutes after the first rejection, and never tried again. So, increasing the greylisting timeout to 5 minutes has solved the problem :) ----- Original Message ---- > From: Adrian Senn <adrian(a)senn.ch> > To: swinog(a)swinog.ch > Sent: Thursday, September 11, 2008 9:37:08 PM > Subject: Re: [swinog] RBL's (again) (Was: Anyone from Green here?) > > Stanislav Sinyagin schrieb: > > > I don't know anything about proper spammers. Greylisting has reduced the > > amount of incoming spam significantly, probably at 90-95%. Of course there > > are spambots which play around greylisting, but they aren't yet that widely > > used. > > Agreed. > > For my mail system at business i have at the moment a high amount of > blocked mails by greylisting, swinog list and some other RBL lists. > At the beginning of this week we had a high amount of blocked mails. > Reason was probably a new wave of spam bot mails. Without the blocking > system our mail gateway wouldn't be able to process the load. > And no we don't have any complains since months! Nor for the greylisting > , nor for the RBL blocking. > > Adrian > _______________________________________________ > swinog mailing list > swinog(a)lists.swinog.ch > http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog

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Re: [swinog] Anyone from Green here?
by Stanislav Sinyagin 11 Sep '08

11 Sep '08

there is at least one reason for not sending email directly: if the server IP address is added to some blacklist like SORBS, the notification is sent to the contact address of the reverse zone. If the server is under the ISP's maintenance, the ISP will (supposedly) notice this event and try its best (haha) to remove the server address from that blacklist. If the end-user's fixed IP address appears in SORBS list, the user will not notice it, and it will take much more time before it's removed. interesting, is there a business case behind? How much would one pay for a reliable and SORBS-free mail relay service? It's actually quite easy to build :) ----- Original Message ---- > From: Per Jessen <per.jessen(a)enidan.ch> > To: swinog(a)lists.swinog.ch > Sent: Thursday, September 11, 2008 12:58:40 PM > Subject: Re: [swinog] Anyone from Green here? > > Stanislav Sinyagin wrote: > > > Anyway, who's going to send email directly from a broadband > > connection, instead of using the ISP's relay? :-) > > > > Provided everything is properly set up, why shouldn't they?

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Re: [swinog] Anyone from Green here?
by Stanislav Sinyagin 11 Sep '08

11 Sep '08

well, I used to support customers which were running mail servers behind a broadband connection. Most spam filters and blacklists like SORBS check the reverse naming, and if it doesn't have words like cable, ppp, dynamic and such, it's quite safe to work with it. It just has to have some decent name, but the name shouldn't be necessarily customizable by the user. Anyway, who's going to send email directly from a broadband connection, instead of using the ISP's relay? :-) ----- Original Message ---- > From: Roman Hochuli <roman.hochuli(a)nexellent.ch> > To: swinog(a)swinog.ch > Sent: Thursday, September 11, 2008 12:20:57 PM > Subject: Re: [swinog] Anyone from Green here? > > Hey Stan > > > There aren't many applications that really depend on the reverse name - > > for most of the things it's enough that the reverse name is a valid one. > > You never tried to operate a mailserver behind a DSL-connection yet, > right? :) > > -- > Best regards, > Roman Hochuli > Operations Manager > > nexellent ag > Saegereistrasse 29 > CH-8152 Glattbrugg > > Phone: +41 44 562 30 40 > Fax: +41 44 562 30 41 > URL: www.nexellent.ch > X-NCC-RegID: ch.nexellent > > Imagination is the one weapon in the war > against reality. > -- Jules de Gaultier > _______________________________________________ > swinog mailing list > swinog(a)lists.swinog.ch > http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog

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Anyone from Green here?
by Per Jessen 11 Sep '08

11 Sep '08

One of my customers has just been told he needs to pay to get a DNS reverse map entry for thei Green ADSL line with fixed IP. Is that really true?? /Per Jessen, Herrliberg

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Re: [swinog] Anyone from Green here?
by Stanislav Sinyagin 11 Sep '08

11 Sep '08

If the reverse mapping points to some valid A record, why do you need to change it? There aren't many applications that really depend on the reverse name - for most of the things it's enough that the reverse name is a valid one. ----- Original Message ---- > From: Per Jessen <per.jessen(a)enidan.ch> > To: swinog(a)lists.swinog.ch > Sent: Thursday, September 11, 2008 11:29:04 AM > Subject: Re: [swinog] Anyone from Green here? > > Marc SCHAEFER wrote: > > > On Thu, Sep 11, 2008 at 10:37:35AM +0200, Per Jessen wrote: > >> One of my customers has just been told he needs to pay to get a DNS > >> reverse map entry for thei Green ADSL line with fixed IP. > >> Is that really true?? > > > > I had a similar query lately, and administration(a)green.ch replied that > > with MPS1 (1 IP address) they won't do it, they will do it only for > > MPS8 and with a delegation. > > That's the answer my customer got too. > > > > > That's a pity, but it's how marketing works. > > It's not only very poor marketing, it's incredibly arrogant. Selling a > static IP and then charging extra for the reverse mapping ... > > > /Per Jessen, Herrliberg > > _______________________________________________ > swinog mailing list > swinog(a)lists.swinog.ch > http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog

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GPS-Technik is hiring: Senior Network Engineer CCIE
by orlando＠anyaccess.ch 09 Sep '08

09 Sep '08

GPS-Technik AG in Schlieren (ZH) is expanding its team and is looking for a Senior Network Engineer (CCIE). Responsibilities: -- Work in multiple long- and short-term network projects for our customers. Face the customers at their premises and work in rapidly changing and stressful environments. -- Manage and fulfil the complete cycle of network projects: Planning, design, deployment and operational support and troubleshooting. -- Work independently, as well as in a team of other engineers. -- Be ready for on-call standby or off-business hours work. The candidate should show good knowledge and experience in the following areas: -- IP Networking at the highest level, CCIE or similar work experience. Knowledge of network protocols at all levels of operation. Practical experience with IP routing protocols (BGP, OSPF, EIGRP), MPLS architectures, good understanding of QoS mechanisms. -- IP Security. Good knowledge of network threats and protection mechanisms. -- Several years of hands-on experience in telecommunication or enterprise networking. -- Optical networking knowledge is a plus. This includes general knowledge of SDH networks and Cisco ONS products. Other requirements: -- Valid and active CCIE certification or similar proven experience -- Teamplayer, collects and shares experience.Autonomous and flexible, ability to set priorities. Demonstration of initiative and pro-active behaviors. Ability to work in a fast moving environment. -- Strong communication skills to all levels of business clients, management and staff -- Fluent German and English, both spoken and written. French is a plus. -- Valid CH driver license -- Swiss, EU citizen or a valid Swiss working permit We offer: -- Challenging and interesting tasks -- A dynamic and motivated team in a growing company -- Versatile job environment -- Competitive salary -- Modern work place near Zurich -- Personal development including further education and professional training Please send your CVs to Mr. Orlando Spitale, CTO, <o.spitale(a)gpstechnik.ch> with a copy to <info(a)gpstechnik.ch>

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primary / backup BGP multi homed issue
by Marco Fretz 04 Sep '08

04 Sep '08

Hi SwiNOGers, We've the problem that sunrise is advertising our prefixes from our backup provider instead of the ones from our primary. This is most likely because our backup provider is a downstream customer from sunrise. Our prefixes then get advertised to level3 (and other sunrise upstream peers). Sunrise seems to be level3 downstream customer and prefer our prefixes from sunrise instead of our primary provider, too. The consequence is that most other ISPs are seeing only our prefixes over sunrise and our backup provider. Sunrise changed their as-communities recently so that's no longer possible for our backup provider to influence their local-pref. I think this might be a common problem in primary / backup BGP scenarios. Any ideas how to solve it? Maybe someone from sunrise can contact me off-list? Thanks and best regards Marco

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Re: [swinog] primary / backup BGP multi homed issue
by Stanislav Sinyagin 04 Sep '08

04 Sep '08

----- Original Message ---- > From: Marco Fretz <mailinglist(a)blah.li> > To: swinog(a)swinog.ch > Sent: Thursday, September 4, 2008 10:33:42 AM > Subject: Re: [swinog] primary / backup BGP multi homed issue > > Stanislav Sinyagin wrote: > > > > > > > > ----- Original Message ---- > >> From: Claudio Jeker > > > >> Prepend your own AS a few times. > > > > this will not help, as L3 sets higher local preference for the prefixes from > its customers. > > yes, and sunrise sets higher pref for prefixes from their customer, too > (as our backup provider is). > > > > > The guys at Sunrise are already working on this, don't worry :) > > So it is a problem only with sunrise? nope. It's how it works everywhere: if you need some special tweaking, you need to request it from your provider, and not from the public list.

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Re: [swinog] primary / backup BGP multi homed issue
by Stanislav Sinyagin 04 Sep '08

04 Sep '08

----- Original Message ---- > From: Claudio Jeker <jeker(a)networx.ch> > Prepend your own AS a few times. this will not help, as L3 sets higher local preference for the prefixes from its customers. The guys at Sunrise are already working on this, don't worry :)

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