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

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Archive for the ‘Communications Development’ Category

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email file decoding: Encode/Decode Quoted Printable – Webatic

Posted by jpluimers on 2021/03/26

For my link archive: [WayBack] Encode/Decode Quoted Printable – Webatic.

It did a splendid job at decoding email files in MIME format Quoted-printable.

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, eMail, Encoding, Internet, Internet protocol suite, Power User, sendmail, SMTP, SocialMedia, Software Development | Leave a Comment »

JSONPlaceholder – Fake online REST API for developers

Posted by jpluimers on 2021/03/25

A great way for testing REST JSON calls is using the [WayBack] JSONPlaceholder – Fake online REST API for developers:

Fake Online REST API for Testing and Prototyping
Serving ~200M requests per month
Powered by JSON Server [WayBack] + LowDB [WayBack]

It is like [WayBack] Placeholder.com: Placeholder Images Done For You [JPG, GIF & PNG] but for JSON and supports both CORS and JSON-P for cross domain requests.

You can either use that site (which has a predefined set of REST calls) or the basic [WayBack] My JSON Server – Fake online REST server for teams that allows you to respond it to a db.json file from github:

Fake Online REST server for teams

Create a JSON file on GitHub

github.com/user/repo/master/db.json
{
  "posts": [
    {
      "id": 1,
      "title": "hello"
    }
  ],
  "profile": {
    "name": "typicode"
  }
}

Get instantly a fake server

my-json-server.typicode.com/user/repo/posts/1
{
  "id": 1,
  "title": "hello"
}

Related

Documentation

There is basic documentation at the repository [WayBack] GitHub – typicode/jsonplaceholder: A simple online fake REST API server:

Read the rest of this entry »

Posted in Communications Development, Development, HTTP, Internet protocol suite, JavaScript/ECMAScript, JSON, REST, Scripting, Software Development, TCP | Leave a Comment »

Some links with notes on WoonVeilig/Egardia security system communications, protocols and support by 3rd party home automation apps

Posted by jpluimers on 2021/03/23

Security issues for older models (mainly GATE01 and WV-1716 systems; which used a lot of Climax components):

A more recent security review:

Physical security is important too; ensure the system is in an enclosed closet, powered by a UPS and your communication lines are secured as well: [WayBack] Manipulationen an Alarmanlagen verhindern – Smarthomewiki

Dutch links on the hardware connections and protocols used:

More recent information:

API usage:

More subdomains (in 2019) via:

–jeroen

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Posted in Communications Development, Development, Power User, Security, Software Development | Leave a Comment »

Postfix TLS Support

Posted by jpluimers on 2021/02/25

For my link archive:

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, postfix, Power User, SMTP | Leave a Comment »

🔎Julia Evans🔍 on Twitter: “ngrep: grep your network!… “

Posted by jpluimers on 2021/02/16

[WayBack] 🔎Julia Evans🔍 auf Twitter: “ngrep: grep your network!… “

So this taught me a new tool and other new things:

  • ngrep – Wikipedia

    ngrep is similar to tcpdump, but it has the ability to look for a regular expression in the payload of the packet, and show the matching packets on a screen or console. It allows users to see all unencrypted traffic being passed over the network, by putting the network interface into promiscuous mode.

    ngrep with an appropriate BPF filter syntax, can be used to debug plain text protocols interactions like HTTP, SMTP, FTP, DNS, among others, or to search for a specific string or pattern, using a grep regular expression syntax.[4][5]

    ngrep also can be used to capture traffic on the wire and store pcap dump files, or to read files generated by other sniffer applications, like tcpdump, or wireshark.

    ngrep has various options or command line arguments. The ngrep man page in UNIX-like operating systems show a list of available options.

  • [WayBack] GitHub – jpr5/ngrep.

    ngrep is like GNU grep applied to the network layer. It’s a PCAP-based tool that allows you to specify an extended regular or hexadecimal expression to match against data payloads of packets. It understands many kinds of protocols, including IPv4/6, TCP, UDP, ICMPv4/6, IGMP and Raw, across a wide variety of interface types, and understands BPF filter logic in the same fashion as more common packet sniffing tools, such as tcpdump and snoop.

  • [WayBack] BPF syntax
  • Berkeley Packet Filter – Wikipedia

–jeroen

Read the rest of this entry »

Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, Software Development, Wireshark | Leave a Comment »

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