Centroid.EU Blog

First day of snow for 2019/2020 Season

December 11th, 2019

I just looked outside and it's lightly snowing.

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Christmas in two Weeks, Solstice in eleven days

December 11th, 2019

I'm looking forward to this, I got all presents already.

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I'm fourty-four and fat, setting up computers is for 20 somethings

December 05th, 2019

Just turned down a job because I refuse to set up computers for a job. Crawling under desks is for 20-somethings who are physically able to do so. I've gone through too many pairs of jeans that I've ruined doing that in the past that I know this isn't a job for me. Next.

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Three Months left for SolarScale.DE

November 30th, 2019

I'm letting this domain expire. I've had it for around 10 years. Just gotta update my contact addresses on my registrar as I believe this domain name always finds it back as the owner address. I'll contact my registration agent soon.

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Slashdot turned Anonymous Coward postings off

November 28th, 2019

And there is a story that I commented on.. it was in regard to a Go player quitting becuase "AI cannot be defeated" Well here is my Reply:

A human brain is about 20cm by 20cm by 15cm give or take 5 cm on each end.  
It is said to consume around 35 Watts.  Can a computer beat that?  We know 
a computer can beat a human mind at gaming...but how large is this computer 
is it a super computer, a quantum computer or a single little SoC computer?  
This is what's important nothing else matters.  And.. we dream!

Dreaming.. because we cannot explain it, oughta rock the sockets off a computer.

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Christmas is exactly 1 month away

November 25th, 2019

Other important dates include the december solstice on the 22nd of december. The major thing keeping me busy currently is putting the final codes in for delphinusdnsd 1.4, which is expected to be released on or before december 31st. Next week is the 1st of advent. Have a Merry Season!

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OpenSMTPD has filters

November 23rd, 2019

Since a few days when I upgraded my mail server I've been trying out different methods of spam control. I think it's a total success what I have so far. Over night it caught 14 spams. That's amazing. I'll continue to play with these settings perhaps I can cut spam 80-90%.

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One week left to get Christmas shopping done

November 22nd, 2019

I do my christmas shopping in November. This is to take the stress off DHL and other couriers like Hermes. It takes a bit of the christmas spirit away but that's another cynical gripe another day.

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Upgraded kite.centroid.eu to OpenBSD 6.6

November 22nd, 2019

I did this yesterday. The upgrade went smooth, no complaints.

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Someone is spoofing and it isn't me!

November 18th, 2019

I'm a good boy when it comes to forging source IP addresses. I have been getting these in my logs:

Nov 18 12:16:59 kite delphinusdnsd[90398]: request on descriptor 12 interface \
"5.9.87.75" from 45.144.2.100 (ttl=249, region=1) for "directedat.usa." \
type=ANY(255) class=1, edns0, answering "REFUSED" (43/32) 
Nov 18 12:16:59 kite delphinusdnsd[90398]: UDP connection refused on \
descriptor 12 interface "5.9.87.75" from 45.144.2.100 (ttl=249, region=1) \
ratelimit policy dropping packet              

For one it's an illegal DNS packet. But how do I know it's spoofed? The IP TTL is 249, meaning at the farthest point from me the spoofer started at 255 TTL or (255 - 249 = 6 hops), 6 hops away. He's not coming from the USA, or that IP because when I ping it, it reveals a TTL of 8 hops (64 - 56 = 8 hops).

kite$ ping -c 2 45.144.2.100
PING 45.144.2.100 (45.144.2.100): 56 data bytes
64 bytes from 45.144.2.100: icmp_seq=0 ttl=56 time=45.155 ms
64 bytes from 45.144.2.100: icmp_seq=1 ttl=56 time=42.906 ms

--- 45.144.2.100 ping statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 42.906/44.031/45.155/1.125 ms
kite$ dc 
255 249 - p
6
64 56 - p
8

On top of that my regions indicate the source region is 1 which is ARIN. But 6 hops out is a little bit too close, I don't believe the USA starts within 6 hops from kite, it takes 4 hops alone to get to the border of this network in frankfurt. So to the script kiddie who is using me as a reflection attack, HOW YA FEEL! (smile, it's your 15 min of fame).

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