The Wiert Corner – irregular stream of stuff

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

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Archive for the ‘Infrastructure’ Category

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Syncthing – on my research list

Posted by jpluimers on 2018/10/05

On my research list:

Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized.

[WayBack] Syncthing

Though it’s ont easy to get right: [WayBack] SyncThing for Android – twm’s blog

which references:

Via: [WayBack] I blogged about SyncThing before, when BitTorrentSync started to annoy the hell out of me. SyncThing is an open source tool for synchronizing directory trees between different devices without requiring a cloud service (it needs a discovery server though… – Thomas Mueller (dummzeuch) – Google+

–jeroen

Read the rest of this entry »

Posted in Cloud, Infrastructure, Power User | Leave a Comment »

How to tell if your site is served via CloudFlare | Igor’s Blog

Posted by jpluimers on 2018/08/10

Based on [Wayback/Archive.is] How to tell if your site is served via CloudFlare | Igor’s Blog, I’ve changed the script a little bit.

I’ve tested it with one of the domains from the Cloudbleed list (a pretty OK indication the site is using cloudflare) and a the example.org site that does not:

# curl -sI https://feedly.com | grep "Server\|__cfduid\|CF-RAY"
Set-Cookie: __cfduid=d779ee6e244349cf06e2707771a9185e21492589239; expires=Thu, 19-Apr-18 08:07:19 GMT; path=/; domain=.feedly.com; HttpOnly
Server: cloudflare-nginx
CF-RAY: 351e5e9af8971497-AMS
# curl -sI https://example.org | grep "Server\|__cfduid\|CF-RAY"
Server: ECS (ewr/15BD)

Domain Source: [Wayback/Archive] pirate/sites-using-cloudflare: Archived list of domains using Cloudflare DNS at the time of the CloudBleed announcement

–jeroen

via: [WayBack] https://www.igorkromin.net/index.php/2017/04/18/how-to-tell-if-your-site-is-served-via-cloudflare/ – Joe C. Hecht – Google+

 

Posted in *nix, *nix-tools, Cloud, Cloudflare, cURL, Hosting, Infrastructure, Power User | Leave a Comment »

The Illustrated Guide to Kubernetes – The Isoblog.

Posted by jpluimers on 2018/07/23

One day you will do containers.

If you want to know how k8n (Kubernetes) can help you with Docker containers, then read [WayBack] The Illustrated Guide to Kubernetes – The Isoblog. and watch the video below.

Very well explained!

Via: [WayBack] The Illustrated Children’s Guide to Kubernetes http://blog.koehntopp.info/index.php/1450-the-illustrated-guide-to-kubernetes/ You can now stop recommending it to me. – Kristian Köhntopp – Google+

 

–jeroen

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Posted in Cloud, Containers, Docker, Infrastructure, Kubernetes (k8n), Power User | Leave a Comment »

Windows FireWall administration: I need to put some time in learning netsh

Posted by jpluimers on 2018/07/16

It seems netsh is something different than bash or csh as it is the command-line interface to many (all?) Windows Firewall settings.

So I need to put some time into learning it.

This gives you all the names of firewall rules, ready for text searching it (with find, grep, etc):

netsh advfirewall firewall show rule name=all

An alternative might be PowerShell as it too has a lot of Windows Firewall plumbing: [WayBack] How to manage the Windows firewall settings with PowerShell – James O’Neill’s blog

Choices, choices.

–jeroen

via: [WayBack] windows firewall – How can I use netsh to find a rule using a pattern – Server Fault

Posted in Firewall, Power User, Windows | Leave a Comment »

“A Journey to OCP”, Open Compute Meetup in Amsterdam – YouTube

Posted by jpluimers on 2018/05/14

Well worth watching: “A Journey to OCP”, Open Compute Meetup in Amsterdam – YouTube

Keywords: Open Compute Platform, Booking, Kohntopp

Related: [WayBack] To France… – The Isoblog.

 

–jeroen

Posted in Cloud, Infrastructure | Leave a Comment »

Windows Firewall: Block rules take precedence over Allow rules

Posted by jpluimers on 2018/05/07

Reminder to self for Windows Firewall: Block rules take precedence over Allow rules (see * below as actually it is even more complex); [WayBack] Firewall Rule Properties Page: General Tab has

Firewall rules are evaluated in the following order:

  1. Allow if secure with Override block rules selected in the Customize Allow if Secure Settings dialog box.
  2. Block the connection.
  3. Allow the connection.
  4. Default profile behavior (allow or block as specified on the applicable Profile tab of the Windows Firewall with Advanced Security Properties dialog box).

Within each category, rules are evaluated from the most specific to the least specific. A rule that specifies four criteria is selected over a rule that specifies only three criteria.

Which means that this will block TCP port 1024 traffic to bar.exe:

The Block rules are inserted by Windows if you click “Cancel” on a dialog like this (note the lowercase path, despite the application being at C:\Program Files (x86)\Foo\Bar.exe):

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Posted in Firewall, Infrastructure, Power User, Windows | 1 Comment »

Limits on Everything – The Isoblog.

Posted by jpluimers on 2018/05/01

Via [WayBack] Limits on Everything – The Isoblog.:

A posting at Brave New Geek about limits on everything, for example limits on message sizes and numbers of in-flight messages in message queues. Interesting read.

Very interesting read indeed: [WayBack] Take It to the Limit: Considerations for Building Reliable Systems – Brave New Geek

You have to set limits, which begs for a few questions:

  1. how to find out which limits and at what levels
  2. how to enforce these limits

Food for thought…

The first can be done with benchmarking, see for instance these from the same blogs above:

Enforcing limits depends in your infrastructure and your communication stacks.

–jeroen

Posted in Cloud, Development, Infrastructure, Opinions, Software Development | Leave a Comment »

Home – Outpan – GTIN to product attribute mapping

Posted by jpluimers on 2018/04/26

On my research list: Home – Outpan as it is a key-value store of EAN (actually GTIN, so including GS1 UPC, EAN which means barcodes like UPC-12, EAN-8, EAN-13 and ITF-14).

  • [WayBack] Global Trade Item Number – Wikipedia
  • [WayBack] API Documentation – Outpan Developers

    Legacy API

    Get Product Information

    GET https://api.outpan.com/v2/products/[GTIN]?apikey=[YOUR API KEY]

    Add Product Name

    POST https://api.outpan.com/v2/products/[GTIN]/name?apikey=[YOUR API KEY]

    Required POST parameters:

    name: The name you would like to add for this product.

    Add Product Attribute

    POST https://api.outpan.com/v2/products/[GTIN]/attribute?apikey=[YOUR API KEY]

    Required POST parameters:

    name: Name of the attribute you would like to add for this product.

    value: Value for the attribute you would like to add for this product.

    • [GTIN] is the barcode number (ISBN, EAN, UPC, …) of the product you’re looking up.
    • All API calls must be done via HTTPS. Plain HTTP calls will be rejected.

–jeroen

via [WayBack] [How To] Scan a barcode and add the product name to Wunderlist : tasker

[How To] Scan a barcode and add the product name to Wunderlist
byu/plepleus intasker

 

Posted in Barcode, Cloud, Cloud Apps, Cloud Development, Development, EAN, Infrastructure, Internet, Power User, Software Development | Leave a Comment »

Doing hardware upgrades, infrastructure rearrangements and software updates over this week. Expect some down-time…

Posted by jpluimers on 2018/04/16

This is upgrade/update week, so new disk space, and quite a bit of reorganisation going on.

Expect down-times in various portions of infrastatus.wiert.me

Secondaries should catch most, but some of the web-sites will be down for a while.

–jeroen

Posted in DevOps, Infrastructure, Power User | Leave a Comment »

From the #AllesIstKaput department: DNS 1.1.1.1 is unusable for many; 9.9.9.9 has government affiliation

Posted by jpluimers on 2018/04/04

Abstract from this morning’s Twitter feed:

  • 1.1.1.1 [Wayback] DNS is broken in many areas (because of for instance AT&T, Vodafone, Cisco screwing up and 1.1.1.1 historically being marked for research purposes)
  • 9.9.9.9 [Wayback] DNS has government affiliation (owned by Quad9, but the partner list below does not look nice)

So what’s left?

There are a more interesting IPv4 addresses untaken for DNS, but I’m not sure they are likable enough:

Read the rest of this entry »

Posted in Cloud, Cloudflare, DNS, Infrastructure, Internet, LifeHacker, Power User | Tagged: , , , , | Leave a Comment »

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