[swinog] Re: bluewein.ch - automatic spamtrap?

[Rainer Duffner via swinog]

> Am 14.07.2022 um 16:57 schrieb Claudio Kuenzler via swinog 
> :
> 
> Hello list,
> 
> We are seeing some "mean" behaviour when sending an e-mail to any e-mail 
> address ending in @bluewein.ch . Note the difference 
> between bluewin and bluewein...
> 
> As soon as an e-mail is sent from our relay to this domain, we get listed on 
> the UCEProtect-Level1 blocklist. Yes, we can discuss whether or not this is a 
> serious blacklist, but some mail providers actually use this service and then 
> block our legit e-mails. 
> 
> Now to this domain. On HTTP all seems in order, the domain is redirected to 
> bluewin.ch . But SMTP points to a separate mail server: 
> mail.ict-olten.ch . Behind ict-olten.ch 
>  seems to be nobody (no website, no other results so 
> far after a bit of research). 
> 
> Does anyone here in the list have information about the behaviour of this 
> domain and who is responsible for it? Obviously a typo "bluewein" instead of 
> "bluewin" happens pretty fast when users are registering and it's already the 
> second or third time within a month that we get blacklisted due to a typo 
> from users.
> 
> thanks for any hints and cheers,
> ck
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Maybe this guy:

https://www.moneyhouse.ch/de/company/graeppi-ict-projects-7019018421


„Mr ICT Projects, would you stand up, please?“


;-)



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[swinog] Re: DNSSEC issue with swizzonic DNS servers?

[Rainer Duffner via swinog]

Am 2022-12-30 11:21, schrieb Benoît Panizzon via swinog:

Hi Markus


the name server from swizzonic is not supposed to provide you with a
answer to all the queries.


I guess if I point to our recursive validating caching NS and it does
not possess this data in it's cache, it will start by following from
the root by asking for _.numberportability.ch to avoid revealing which
host it is exactly looking for until it reaches the authoritative DNS
for that zone and then ask this one directly for the desired RR.

I guess this is where something is breaking the chain.

I also don't see why the swizzonic DNS which is the authoritative
primary should not answer to all queries.



If I want to or need to ask the (supposedly) authoritative server(s) 
about a domain, I add +norecurs.


I believe, if you disable recursive queries on the authoritative-server, 
it will not answer them, even if it technically could.


Does DNSSEC change that?

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[swinog] Re: strange failure from online.de MX

[Rainer Duffner via swinog]

Am 2023-03-23 09:41, schrieb Michael Righter via swinog:

Hi

A mail to @online.de is blocked on their site with this error. Never
seen such an error.
Anyone seen this before or knows a contact to them?

2023-03-21T09:00:04Z;EMIG;mx01.emig.kundenserver.de[217.72.192.66];400
EmiG fingerprint mismatch
2023-03-21T09:30:04Z;EMIG;mx00.emig.kundenserver.de[212.227.15.40];400
EmiG fingerprint mismatch
2023-03-21T10:00:04Z;EMIG;mx00.emig.kundenserver.de[212.227.15.40];400
EmiG fingerprint mismatch
2023-03-21T10:30:04Z;EMIG;mx01.emig.kundenserver.de[217.72.192.66];400
EmiG fingerprint mismatch
2023-03-21T11:00:03Z;EMIG;mx00.emig.kundenserver.de[212.227.15.40];400
EmiG fingerprint mismatch
2023-03-21T11:30:02Z;EMIG;mx01.emig.kundenserver.de[217.72.192.66];400
EmiG fingerprint mismatch

Thanks Michael
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Seems to be this:

https://www.e-mail-made-in-germany.de/index.html

Is it a forwarded mail?

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[swinog] Any users of SCION here?

[Rainer Duffner via swinog]

Hi,

and specifically the hardware the company behind it (anapaya) sells.





Best Regards
Rainer
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[swinog] Re: Research project on Sustainable Networking

[Rainer Duffner via swinog]

Am 2024-06-21 16:48, schrieb Romain Jacob via swinog:

Dear Urs,

Let me keep the list on to reply to some questions, as you are not the
first to ask:

* Most routers we are interested in have multiple power supply. Our
strategy is to use one measurement unit per PSU. That demands extra
hardware, but we wouldn't want to have two PSU connected to the same
power meter anyway as this would create a potential single point of
failure.
* Network connectivity for the Pi is required but DOES WORK BEHIND A
FIREWALL. The only requirement is that the Pi must be able to connect
to the Internet.

Thanks again to those who already reached out!




"the Internet" - you mean Port 443, any IP?


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