Networking IPv6 (6rd), Wi-SUN, Linux stuff

  • Lot's of tuning while setting up Telia 6rd in one environment with Linux (Ubuntu) router. Automatic remote IPv4 address fetch, updating radvd.configuration, re-enabling routing, setting forwarding firewall rules and so on. But now it works, awesome. Only drawback of course is that you won't get totally static addresses.
  • Reminded my self about good old stuff, machine code formats COM, EXE, ELF , PE, HUNK.
  • I've got Synaptic touch pad on one Lenovo laptop. Touchpad is barely working, you'll have to push it hard, and when you move finger a lot, pointer on screen barely moves, but it DOES MOVE. What's the problem? Is the touchpad broken? Is the touchpad disabled? Is the driver broken or what... Who knows. But one darn funny thing there is, which I got from forums. If I suspend the laptop and then wake it up... Guess what, the touchpad miraculously got fixed. So it's driver issue, even if it seems like hardware failure. Yet another classic added to experiences. - Insane rage and exceptional quality engineering. - Rage! - That's not a solution, but a temporary workaround.
  • Got annoyed because smartmontools package installs postfix and lost of other overhead. But it's just fine if you'll download the package and install it, without dependencies, it works perfectly. No more bloat libraries!
  • Interestingly Yodel-App is very similar to my Local Board (LclBd) concept. Except mine used hashtags instead of groups, as well as personalized filters, instead of groups and so on. One thing missing from Yodel are private messages, which makes is quite useless, with the "no personal information" rule. Ref: LclBd shutdown notice. Yet I didn't implement location "heat map", which would have kept some popular posting locations hot, even if you travel, it was on my mind. But still, better implemented than with Jodel.
  • New platform for IoT communication Wi-SUN networking technology, operating in 800 MHz, 900 MHz and 2400 MHz frequency ranges and based on IEEE 802.15.4.
  • Kudos to Darknet Diaries again, excellent show. Thank you so much!
  • About extreme fragmentation. On few servers I checked, there were average contiguous free space is 16 KB. So whom ever claims extreme fragmentation isn't reality is wrong. In that case, when you write whatever file to disk, you'll end up with ultra fragmented file no matter what you do. Unfortunately that's quite normal situation in production environments, where there isn't vast amounts of unused free disk space, but space is allocated based on demand.
  • Found out that Firefox doesn't support link local addresses. That's way annoying for configuring stuff on LAN. I think it's obvious fail. And on top of that, the ZyXEL firewall won't allow using ULA addresses. Sigh (!) - So many things are just so broken. Ok, then Mobile Outlook doesn't detect IPv6 URLs as URLs at all. I just can't stop loving elite coders. https://[ipv6:addr:ess::1]:443/ Sigh, sigh, sigh.
  • Just noted, that the router I'm using allows smaller than /64 subnets without any problems. Technically it assigns /64 to every network, but then the end devices are configured to use /128 via DHCP and the router takes care of routing traffic between different networks. No big deal if the traffic is switched, or routed. Normal users won't ever notice any difference. Sure, it does break some stuff, but for normal unicast IPv6 traffic, that's not a problem at all.
  • Nerdy network nerds. When I tested a few network things, my friend called me, are you source of these packets and sent me a log. I said yep, and sent my copy of the same packets. What else can I say, than nerdy network nerds. Who has packet captures of some packets, which you can immediately discuss about. Lulz. Especially form both sides, if not having any pre-agreed arrangement.

2020-03-08