News archive February 2019 - Koos van den Hout

Ineens is de haalbare VDSL upstream snelheid (engels 'attainable') gezakt naar wat daarvoor ongeveer de huidige VDSL upstream snelheid (engels 'current') was. Een opvallende hik in de grafieken. Ik heb geen idee wat de aanleiding is en of dit weer kan veranderen.

Dit is alleen te zien in het modem, de hele PPP sessie is gewoon in stand gebleven.

Sunday had less time to be at the radio for ISS passes but one pass was ok. It started with the end of one image, one full image and the start of the next image. The audio recording of the whole pass is included.

After hickups in recording audio from the radio on two previous passes I rebooted the whole system (it was nagging about a reboot anyway) and I received two more partial images.

Thanks to ARISS Russia team member Sergey Samburov, RV3DR for making this possible!

Second pass of the International space station gave me one partial picture and one complete (with some noise).

In this weekend there are extra slow scan tv (SSTV) transmissions from the international space station (ISS). The ISS moves across the sky when viewed from earth so I calculate beforehand when it will pass across the sky and what the trajectory will be.

I woke up in time to be outside for the first one. A low pass over the horizon and most of the pass matched a pause between transmissions, so not much image received.

Het blijft actueel: Nep-mail over hack en bezoek pornosite - Fraudehelpdesk.

Ik zie ze zelf ook op verschillende plekken. Trap hier niet in.

Dit keer een bitcoin adres waar nog geen transacties in zichtbaar zijn: 12PUa2SHjWAUEpZZUxQNvxa7epab7g2Ksb alleen is mij niet duidelijk of deze site het verschil tussen een echt aangemaakt adres zonder transacties of een willekeurig adres weet.

Toevoeging 2019-02-07: Een bedrag van 808 dollars in bitcoins staat nu in de wallet, in 2 transacties. Gegeven het bedrag in het originele mailtje zijn er dus 2 mensen ingetrapt.

Toevoeging 2019-02-11: Er is nu over de 3000 dollar in bitcoins binnen. Als ik zo naar de transacties kijk lijken er 7 mensen ingetrapt.

Nog meer informatie: Bitcoin Abuse Database for 12PUa2SHjWAUEpZZUxQNvxa7epab7g2Ksb (engelstalig).

I noticed something really weird in the kernel log of a virtual machine:

Feb  5 11:46:54 server kernel: [2936066.990621] Bluetooth: Core ver 2.22
Feb  5 11:46:54 server kernel: [2936067.005355] NET: Registered protocol family 31
Feb  5 11:46:54 server kernel: [2936067.005901] Bluetooth: HCI device and connection manager initialized
Feb  5 11:46:54 server kernel: [2936067.006404] Bluetooth: HCI socket layer initialized
Feb  5 11:46:54 server kernel: [2936067.006838] Bluetooth: L2CAP socket layer initialized
Feb  5 11:46:54 server kernel: [2936067.007280] Bluetooth: SCO socket layer initialized
Feb  5 11:46:54 server kernel: [2936067.009650] Netfilter messages via NETLINK v0.30.
Feb  5 11:46:54 server kernel: [2936067.056017] device eth0 entered promiscuous mode

The last two are the giveaway about what really happened: I started tcpdump to debug a problem. But I did not expect (and do not need) bluetooth drivers on a virtual machine, it will never have access to a bluetooth dongle.

After setting up /etc/modprobe.d/local-config.conf with

blacklist bluetooth

tcpdump still works fine and no bluetooth drivers are loaded.

Update: Most recommendations are to disable the bluetooth network family:

alias net-pf-31 off

After a month with three digimode radio contests I plotted the number of amateur radio contacts again. The number of contacts is clearly higher each January as a contest month, with this January a new peak.

The contests were the ARRL RTTY Roundup on 6 and 7 January, the UBA PSK63 prefix contest on 12 and 13 January and the BARTG RTTY Sprint Contest on 26 and 27 January.

Nicer looking font due to the upgrade of "radio workstation" thompson. I guess even gnuplot is coming along with the modern times.

before, before, before, before