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OpenSuSE Tumbleweed – when `halt` doesn’t halt, but CLI+HLT the CPU at the end of the shutdown procedure

Posted by jpluimers on 2017/04/26

When halt is not a real halt but a suspend of the CPU.

When halt is not a real halt but a “disabling” of the CPU.

TL;DR:

Don’t use halt, use poweroff instead.

A while ago I wrote about OpenSuSE 12.x not halting after a halt:

openSUSE 12.x: “A plain `halt` will not shutdown the system properly.”
openSUSE 12.x: today the same system would not plain “reboot” either (was: “A plain `halt` will not shutdown)

The same holds for more recent OpenSuSE systems, but ESXi would never tell what was going on.

Recently I installed an OpenSuSE Tumbleweed system under VMware Fusion (running on Mac OS X) which indicated “The CPU has been disabled by the guest operating system.”

Log indicates a “Shutdown” which in fact is a CPU not powered down.

Which — Understanding the message: The CPU has been disabled by the guest operating system (2000542) | VMware KB [WayBack] — means that halt will not power down the VM but perform a CLI + HLT on the CPU. This effectively hangs the CPU even though the console log on the right tells does a real Shutdown.

In the past – even under ESXi – a halt would just power down the system, so based on the above I did more digging and fount this very interesting answer in rhel – What is the difference between these commands for bringing down a Linux server? – Unix & Linux Stack Exchange [WayBack] which comes down to:

on a systemd [WayBack] based system commands like halt, reboot, shutdown all invoke systemctl [WayBack] calling for a specific target [WayBack].
mapping of targets and commands is as follows (quoted from the answer):
- systemctl isolate halt.target has the shorthands:
  - shutdown -H now
  - systemctl halt
  - plain unadorned halt
- systemctl isolate reboot.target has the shorthands:
  - shutdown -r now
  - telinit 6
  - systemctl reboot
  - plain unadorned reboot
- systemctl isolate poweroff.target has the shorthands:
  - shutdown -P now
  - telinit 0
  - shutdown now
  - systemctl poweroff
  - plain unadorned poweroff
- systemctl isolate rescue.target has the shorthands:
  - telinit 1
  - systemctl rescue
- systemctl isolate multi-user.target has the shorthands:
  - telinit 2
  - telinit 3
  - telinit 4
- systemctl isolate graphical.target has the shorthand:
  - telinit 5

For a SysV [WayBack] init runlevels versus systemd targets see:

The systemd parameters making things a bit confusing, for instance you can do reboot --halt and more of those shown in linux – Are there any good reasons for halting system without cutting power? – Super User [WayBack].

That also explains that halt without a powerdown can be useful: it for instance gives the end-user the opportunity to click the reset button instead of the power button after a halt.

–jeroen

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux, systemd, SysVinit, Tumbleweed | Leave a Comment »

Easily print GitHub markdown as beautiful PDFs that – in Chrome – immediately download

Posted by jpluimers on 2017/04/26

Printing Markdown with GitPrint

Simply view any Markdown file on GitHub, then in your URL bar replace the github.com part of the URL with gitprint.com — your markdown file will be rendered to a beautiful, printable PDF.

Try an example https://gitprint.com/jquery/jquery/blob/master/README.md

Every once in a while I feel like I’ve been living under a stone for years. Today is such a day as gitprint has been around since 2014 and I only noticed it until now.

It’s cool as it prints any github page (including Markdown, RestructuredText, etc) as a PDF file.

Notes:

Read the rest of this entry »

Posted in Bookmarklet, Development, DVCS - Distributed Version Control, git, GitHub, jQuery, Software Development, Source Code Management, Web Browsers | Leave a Comment »

pestudio – great tool for doing PE executable analysis

Posted by jpluimers on 2017/04/25

pestudio

The standard version of pestudio is free to download as a ZIP file (md5: D62BDE0319015C7CD5ABA8D03A36FFBF).
Once decompressed, pestudio does not require any installation nor does it change the system it is running on.
It is fully portable and runs on any Windows platform. Details about the features of this standard version are available at here [WayBack].

Download pestudio 8.54 [WayBack]

pestudio⁺

The professional version of pestudio must be purchased and provides the full set of features of the tool. Details about the professional version as well as the licence conditons are available here [WayBack].

Source: pestudio [WayBack]

A great guide is at PeStudio Standard [WayBack] which despite the name does an in-depth explanation on how to use this great tool.

–jeroen

Via: Guide / tutorial, nice tool to examine executables, find virus etc – David Berneda – Google+ [WayBack]

Posted in Development, Software Development, Windows Development | Leave a Comment »

Some links for MikroTik tips and scripts

Posted by jpluimers on 2017/04/25

MikroTik has great hardware, but getting things to work can be a bit ehm intimidating.

So here are some links that were useful getting my CCR1009 and CRS226 configurations to do what I wanted.

Saving your configuration (two possibilities: binary backup file which only works on the same physical model device, or text based configuration export script that you can import back to any model).
- When you import a configuration, those settings are added to your current configuration.
- If your configuration gets more complex, it pays to split the textual exports into logical blocks so you can import each of them individually.
- You can even put the downloaded exports into a version control system like Git or SVN.
- The exported configurations are stored in the file system. You cannot manually rename these files, but there is a scripting trick to perform the rename.
- You can download the exported configurations from the UIs in webfig, winbox or through sftp after configuring certificate logon.
Choosing ports for WAN and LAN
- On the CCR1009, the first 4 ports can be used for switching (see also other ref), so it makes sense using those for LAN and others for WAN as it can increase speed: CCR 1009 switch chip menu – MikroTik RouterOS
  - Just look at the block diagrams of the various CCR1009-8G-1S models (currently CCR1009-8G-1S-PC, CCR1009-8G-1S-1S+, CCR1009-8G-1S-1S+PC) as they all have the first four ports connected to an Atheros 8327 Gigabit Switch chip.
  - All ports of the CRS226 models (CRS226-24G-2S+RM and CRS226-24G-2S+IN) are connected through the combined QCA8519-AC2C switching and CPU chip).
  - Note that the switching chips won’t allow for Torch. But you can find the MAC addresses per physical switch ports in the unicast FDBs: Switch -> Unicast FDB shows you every mac and the physical port it is connected to.
Never ever use the domain named .local for your local domain if you have Apple devices in your network:
- .local is a reserved dns domain by the apple os and should not be used if you expect apple devices to work as expected.
Many people like Winbox because they prefer visual configuration. Others like the web or terminal interface better (the terminal is especially useful for scripts)
- Windows Winbox: MikroTik Routers and Wireless: Downloads
- Mac OS X Winbox: “Winbox” by MikroTik with Wine in order to make it usable on Mac – Joshaven.com
Manual:First time startup – MikroTik Wiki (default password for admin is empty; WinBox and web-interface are available on WAN *and* LAN interfaces!)
- Mikrotik Howto block Winbox Discovery + Limit Winbox Access | Syed Jahanzaib Personal Blog to Share Knowledge !
One of the first things I did was binding some ports to use LAN and others to use WAN. The LAN ports are in a bridge: Configure one port for WAN and others for LAN – MikroTik RouterOS
Manual:IP/DHCP Server – MikroTik Wiki and Manual:IP/Pools – MikroTik Wiki
- I had a lot of DHCP entries on my LAN before switching to the MikroTik for which some I wanted to add statically. Couldn’t find out how to do that in the IP pool, but it appeared there is a different way to do it:
  - Assign fixed / static IP address via Mikrotik DHCP server
  - Notes:
    1. the MAC address cab be either (:) separated or minus (-) separated. And yes: there is a RegEx for that.
    2. usually you don’t pass the client-id (it’s here just as an example that you could use it, but most DHCP clients do NOT use a client-ID, as they only use the MAC address)
  - /ip dhcp-server lease add address=192.168.100.10 mac-address=70:F1:A1:D1:49:49 client-id="client10"
Manual:IP/DNS – MikroTik Wiki
- If you use the MikroTik as a caching DNS server, then you need to enable “/ip dns set allow-remote-requests=yes”, but also immediately disable DNS TCP and UDP on all your WAN ports. See:
  - Client DNS issue (reddit)
  - Firewall filter rules for DNS – MikroTik RouterOS
  - /ip firewall filter add chain=input protocol=tcp dst-port=53 action=drop in-interface=!bridge_lan add chain=input protocol=udp dst-port=53 action=drop in-interface=!bridge_lan
  - If you run your internal DNS servers for the outside world, modify the rules to forward non non-LAN ports; see https://www.youtube.com/watch?v=X-wkLYKYaj8: How to redirect DNS to own DNS server using mikrotik routerboard
  - You can add statis DNS entries to your caching server; see https://www.youtube.com/watch?v=zDEx7TxCm1s: Mikrotik Training- Static DNS Entries (With Closed Captioning)
nslookup on the Mikrotik itself is called put[: resolv ...] syntax: nslookup on Mikrotik – MikroTik RouterOS
- Examples (first uses the internal DNS, second one one of the Google DNS servers):
  - put [:resolve shell.xs4all.nl]
  - put [:resolve shell.xs4all.nl 8.8.8.8]
  - put [:resolve 194.109.21.9]
tolaris.com · Synchronising DHCP and DNS on Mikrotik routers (script available on Github: Tolaris/mikrotik-dns-dhcp).
- via MikroTik – Automatically creating DNS record for each DHCP lease/client – GeekTank
- alternatives:
  - Mikrotik DHCP to DNS hostnames | BLOG.MESOUUG.COM
  - Setting static DNS record for each DHCP lease – MikroTik Wiki
Hardening (since my Guest WiFi is outside of the Mikrotik LAN and WAN realm, I’ve left some things open, for instance MAC service is available, but on a limit set of interfaces):
- Router Hardening — Manito Networks
- Not sure if disabling Neighbour discovery is a good thing, as it will disable this from the console as well
  /ip neighbor print;
  - Mikrotik Howto block Winbox Discovery + Limit Winbox Access | Syed Jahanzaib Personal Blog to Share Knowledge !
- Blacklist Filter update script – MikroTik RouterOS
  - As the above is much better maintained it is preferred over Spamhaus + Dshield Malicious Ip Blacklist For RouterOS Now Availalable GRATIS! – MikroTik RouterOS
Manual:Upgrading RouterOS – MikroTik Wiki
- http://web.archive.org/web/*/http://www.mikrotik.com/download/CHANGELOG_6
Manual:IP/Route – MikroTik Wiki (if you think routing is a massive topic, read about firewall rules).
Not sure this is a good idea, but you can get a DDNS address in the sn.mynetname.net domain and VPN to it (for instance using PPTP): Quick Set Home AP — How to use vpn provided? – MikroTik RouterOS
You need to setup both the clock (date/time) and SNTP in one step:
- Setup SNTP (Winbox) aka NTP (shell): /system ntp client set enabled=yes server-dns-names=0.pool.ntp.org,1.pool.ntp.org,2.pool.ntp.org,3.pool.ntp.org
  After a few seconds the Winbox will update the SNTP Client dialog and a few seconds later, the Clock dialog will also update itself.
Manual:IP/Firewall/NAT – MikroTik Wiki
- dstnat: Forwarding a port to an internal IP – MikroTik Wiki and https://www.youtube.com/watch?v=8sGL58AhQCQ:
  Mikrotik Training- Port Forwarding (With Closed Captioning)
- srcnat: getting NAT to work
- Hairpin NAT – MikroTik Wiki
- netmap vs srcnat/dstnat: IP Firewall rules, need help with optimization – MikroTik RouterOS
I like these ones as they use Winbox:
- Mikrotik – Setup – Powered by Kayako Help Desk Software
- Manual:Initial Configuration – MikroTik Wiki
Sharing Ideas … Mikrotik with Kannel/playSMS
- via: Mikrotik Related | Syed Jahanzaib Personal Blog to Share Knowledge !
- Mikrotik Firewall / Short Notes + Scripts
Connect CCR1009 with CSR226 over a longer distance than 3 meter – MikroTik RouterOS
Graphing: ensure you only limit this to IP-addresses that you want graphs to be visible on (0.0.0.0/0 makes it visible to ALL): Manual:Tools/Graphing – MikroTik Wiki
DNS – MikroTik RouterOS: I would like to have my router to stop all the DNS coming from my clients and not reaching my ISP provider.
Email sending can now also use the DNS-name of the SMTP server: Why does the email server configuration only allow IP-addresses? – MikroTik RouterOS
Dynamic DNS Update Script for No-IP DNS for Router OS V.6.7 – MikroTik RouterOS
Script for Ransomware Tracker by abuse.ch. Tracking Ransomware Infrastructure around the globe. Source: How I fight ransomware (crypto viruses) with Mikrotik – MikroTik RouterOS
/ip firewall mangle add chain=prerouting action=change-ttl new-ttl=increment:1
very simple solution for a traceroute to Hide ip address – MikroTik RouterOS
Using staged address list to perform Bruteforce login prevention – MikroTik Wiki

Very advanced stuff:

Packet flow (maybe the toughest part to wrap your head around):

Manual:Packet Flow – MikroTik Wiki (with diagrams on RouterOS 6.x and 3.x can flow).
Manual:Packet Flow v6 – MikroTik Wiki (with updated RouterOS 6.x diagram).
New Packet flow diagram – Page 2 – MikroTik RouterOS (Visio / PDF version of an even newer diagram)

Scripts:

Load balancing:

Syntax highlighting:

Syntax highlighting and completions for Sublime Text – MikroTik RouterOS
- See also: mikrotik/editors/Sublime3 at master · martinclaro/mikrotik and mikrotik/editors/Sublime2 at master · martinclaro/mikrotik and Kentzo/MikrotikScript: Syntax highlighting and completions for the Mikrotik Scripting language for the Sublime Text editor
external editor syntax highlighting – MikroTik RouterOS (Notepad++, Textpad, VIM, EditPlus – look for the word Download and the .zip, .rar and .gz extensions)
- See also: mikrotik/syntax at master · olejor/mikrotik
Atom: language-routeros-script and ofstudio/atom-language-routeros-script: MikroTik RouterOS script language support in Atom
TextMate2: tiktuk / RouterOS.tmbundle — Bitbucket
GEdit: webpagetech/gedit-routeros: Mikrotik RouterOS code syntax highlighting for .rsc Files
Notepad++: jtroybailey/RouterOS-Notepad—Syntax-Highlighting: Syntax highlighting for routeros exports in notepad++

Pictures

CCR1009-8G-1S-1S+ General info & Questions – MikroTik RouterOS

Very well written blog:

Manito Network’s Mikrotik solutions blog. In-depth articles on Mikrotik routing, security, best practices, VPN, and more.

Source: Mikrotik — Manito Networks

Solutions for RouterOS-based Mikrotik networks. Includes security and best practices, VPN, routing, switching, and more.

Source: Mikrotik-1 — Manito Networks

–jeroen

Posted in DNS, Internet, IPSec, MikroTik, Network-and-equipment, OpenVPN, Power User, PPTP, routers, VPN | Leave a Comment »

ANSI HTML Adapter example

Posted by jpluimers on 2017/04/24

ANSI HTML Adapter example installation on OpenSuSE Tumbleweed:

zypper addrepo http://download.opensuse.org/repositories/utilities/openSUSE_Factory/utilities.repo zypper refresh zypper install aha

On Mac OS X:

brew install aha

Output looks like this: ANSI HTML Adapter example:

diaspore:/etc # aha --version Ansi Html Adapter Version 0.4.9.0 diaspore:/etc # aha --version | grep aha diaspore:/etc # aha --version | aha
Ansi Html Adapter Version 0.4.9.0

And the aha --help output on Mac OS X:

Ansi Html Adapter Version 0.4.8.0
aha takes SGR-colored Input and prints W3C conform HTML-Code
use: aha <options> [-f file]
     aha (--help|-h|-?)
aha reads the Input from a file or stdin and writes HTML-Code to stdout
options: --black,      -b: Black Background and White "standard color"
         --pink,       -p: Pink Background
         --stylesheet, -s: Use a stylesheet instead of inline styles
         --iso X,    -i X: Uses ISO 8859-X instead of utf-8. X must be 1..16
         --title X,  -t X: Gives the html output the title "X" instead of
                           "stdin" or the filename
         --line-fix,   -l: Uses a fix for inputs using control sequences to
                           change the cursor position like htop. It's a hot fix,
                           it may not work with any program like htop. Example:
                           echo q | htop | aha -l > htop.htm
         --word-wrap,  -w: Wrap long lines in the html file. This works with
                           CSS3 supporting browsers as well as many older ones.
         --no-header,  -n: Don't include header into generated HTML,
                           useful for inclusion in full HTML files.
Example: aha --help | aha --black > aha-help.htm
         Writes this help text to the file aha-help.htm

Copyleft Alexander Matthes aka Ziz 2015
         zizsdl@googlemail.com
         http://ziz.delphigl.com/tool_aha.php
This application is subject to the MPL or LGPL.

–jeroen

	diaspore:/etc # aha –version
	Ansi Html Adapter Version 0.4.9.0
	diaspore:/etc # aha –version \| aha
	<?xml version="1.0" encoding="UTF-8" ?>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
	<!– This file was created with the aha Ansi HTML Adapter. https://github.com/theZiz/aha –>
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<meta http-equiv="Content-Type" content="application/xml+xhtml; charset=UTF-8" />
	<title>stdin</title>
	</head>
	<body>
	<pre>
	<span style="color:red;font-weight:bold;">Ansi Html Adapter</span> Version 0.4.9.0
	</pre>
	</body>
	</html>

view raw

aha.example.txt

hosted with ❤ by GitHub

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »

Some Wireshark links

Posted by jpluimers on 2017/04/24

I don’t use Wireshark enough to be fluent, so here are some links and quotes that proved to be useful for me:

How do I view a raw HTTP request/response? – Wireshark Q&A: Right click one of the frames and select ‘Follow’, then ‘TCP stream’.
Hyper_Text_Transfer_Protocol – The Wireshark Wiki: You cannot directly filter HTTP protocols while capturing. However, if you know the TCP port used (see above), you can filter on that one.
These two are totally different beasts: CaptureFilters – The Wireshark Wiki and DisplayFilters – The Wireshark Wiki
- I used this DisplayFilter a while ago: (ip.dst == 192.168.99.61 && ip.src == 192.168.99.38) || (ip.dst == 192.168.99.38 && ip.src == 192.168.99.61) && http
  which seems equivalent to
  (ip.addr == 192.168.99.61 && ip.src == 192.168.99.38) && http
- For SOAPAction traffic (and the HTTP responses), I often start with: http contains "SOAPAction:" || http contains "HTTP"
- I used these CaptureFilters a while ago as well:
  - src 213.146.155.196 and tcp port 8500
  - ether host MAC 00:21:AC:01:08:B1
- Display filters can become very complex.
  - One of the things I needed was to filter on hex content. This is using the frame contains clause will match any binary content in the frame (you can be more specific with for instance tcp containsor data contains (which uses the data dissector). Example: (frame contains 21:00 || frame contains 00:21) && tcp.len > 0
  - Some examples: Top 10 Wireshark Filters (by Chris Greer)
  - The matches operator works for RegEx matches on plain text: data.data matches "\xa4.\xc3...\xb2"
  - MAC addresses need to have the : as separator (a – does not work), like in eth.src == MAC 00:21:AC:01:08:B1
WIRESHARK – The Easy Tutorial – Filters
I find the WireShark User’s Guid sections often a lot harder to read than the Wiki pages on the same topics, for instance the CaptureFilter Section and Build DisplayFilter Section.
exporting payload data in binary file – Wireshark Q&A
tcpdump: Re: tcpdump filter for HTTP GET
- which uses hex offsets explained at Wireshark · Wireshark-users: Re: [Wireshark-users] Hex Offset Needed
Wireshark · String-Matching Capture Filter Generator is really really cool. It gets you
- GET as tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x47455420
- POST as tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x504f5354 && tcp[((tcp[12:1] & 0xf0) >> 2) + 4:1] = 0x20
Capture file saving:
- capture files do not store everything.
- From the UI, you cannot save captures while capturing.
- You can setup capture options to save captures periodically.

–jeroen

Posted in *nix, *nix-tools, Power User, Wireshark | Leave a Comment »

opensuse – How to run my script after SuSE finished booting up? – Unix & Linux Stack Exchange

Posted by jpluimers on 2017/04/21

For future research: opensuse – How to run my script after SuSE finished booting up? – Unix & Linux Stack Exchange

Reason? Want to show the output of this as the last boot sequence line:

hostnameip route echo ip address | grep -w 'UP\|flags\|inet\|inet6' echo more detailed info through "ip address" and "ip route" cat /etc/resolv.conf | grep nameserver

–jeroen

Posted in *nix, *nix-tools, bash, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »

when apple.com != apple.com – Phishing with Unicode Domains – Xudong Zheng

Posted by jpluimers on 2017/04/21

Vulnerability in Chrome, Firefox, and Opera makes users susceptible to phishing with Unicode domains.

Source: [Archive.is] Phishing with Unicode Domains – Xudong Zheng

Basically these are not the same sites:

[WayBack] Hey there! – https://www.аррӏе.com/
[WayBack] Apple – https://www.apple.com/

Depending on the font used, you might notice it if you look very careful.

Keywords: Unicode codepoints, visual similarity, codepoint to character mapping in fonts, Punycode

Via: [WayBack] Same URL, two websites? (notice the difference)1. https://www.аррӏе.com/2. https://www.apple.com/ – Jean-Luc Aufranc – Google+

References:

[WayBack] Punycode – Wikipedia
[WayBack] IDN homograph attack – Wikipedia
[WayBack] IDN in Google Chrome – The Chromium Projects
[WayBack] The Go Playground – comparing apple with аррӏе.
[WayBack] 683314 – Security: Whole-script confusable domain label spoofing – chromium – Monorail
[WayBack] 1332714 – IDN Phishing using whole-script confusables on Windows and Linux

–jeroen

Posted in Power User, Security | Leave a Comment »

Tested the CastBuddy extension from the Chrome Web Store: nice, but high CPU usage even when no videos

Posted by jpluimers on 2017/04/21

CastBuddy – Chrome Web Store:

This extension finds videos on the web sites you are browsing and allows you to play them on your Chromecast device.

Works nice if you need it, but uses a lot of CPU (on my Retina MacBook with latest chrome: about 75% of one CPU core) so it drains battery fast.

You can view this high CPU usage in the Chrome Task Manager (which used to be available through chrome://tasks, but this is one of the use full Find Hidden Features On Chrome’s Internal Chrome:// Pages features they removed). Fire up the Chrome Task Manager through the Window menu.

Verdict

Enable only when you need it. Disable after use in chrome://extensions

–jeroen

via: CastBuddy – Chrome Web Store:

When it finds Chromecast comptible videos ( .webm, .mp4, .mkv etc), count of videos is shown over extension’s menubar icon, which you can click to Select a video and extension will send it to your Chromecast device. Once a casting session is established, you can control video playback from Extension’s popup page.

Posted in Chrome, Google, Power User | 2 Comments »

Warning: C64 geek pr0n! A Mind Is Born

Posted by jpluimers on 2017/04/20

Geek pr0n on the C64:

Making a demo in just 256 bytes would be a formidable challenge regardless of platform. A Mind Is Born is my attempt to do it on the Commodore 64. In the absence of an actual 256-byte compo, it was submitted to the Oldskool 4K Intro compo at [WayBack] Revision 2017, where it ended up on 1st place.

Source: [WayBack] A Mind Is Born

Via:

–jeroen

Read the rest of this entry »

Posted in 6502, C64, Commodore, Development, History, Software Development | Leave a Comment »

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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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OpenSuSE Tumbleweed – when `halt` doesn’t halt, but CLI+HLT the CPU at the end of the shutdown procedure

Easily print GitHub markdown as beautiful PDFs that – in Chrome – immediately download

pestudio – great tool for doing PE executable analysis

pestudio

pestudio⁺

Some links for MikroTik tips and scripts

ANSI HTML Adapter example

Some Wireshark links

opensuse – How to run my script after SuSE finished booting up? – Unix & Linux Stack Exchange

when apple.com != apple.com – Phishing with Unicode Domains – Xudong Zheng

Tested the CastBuddy extension from the Chrome Web Store: nice, but high CPU usage even when no videos

Warning: C64 geek pr0n! A Mind Is Born

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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