The Wiert Corner – irregular stream of stuff

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

  • My badges

  • Twitter Updates

  • My Flickr Stream

  • Pages

  • All categories

  • Enter your email address to subscribe to this blog and receive notifications of new posts by email.

    Join 1,839 other subscribers

Archive for the ‘*nix-tools’ Category

dig show only the answer section: specify both +noall and +answer – via: Server Fault

Posted by jpluimers on 2016/01/25

The solution: add both the +noall and +answer flags before the query.

dig +noall +answer google.de

–jeroen

via dig show only answer – Server Fault.

Posted in *nix, *nix-tools, Apple, Linux, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.4 Tiger, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, OS X 10.10 Yosemite, OS X 10.8 Mountain Lion, Power User, SuSE Linux | Leave a Comment »

Getting your public IP address from the command-line

Posted by jpluimers on 2016/01/13

Many sites giving your public IP address return a web page with a bloat of html. From the command-line, you are usually only interested in the IP-address itself. Few services return exactly that.

Below are command-line examples to provide the public IP address mostly from a *nix perspective. Usually you can get similar commands to work with Windows binaries for wget and Windows binaries for curl.

In the end, I’ve opted for commands in this format, as I think akamai will last longer than the other sites (but does not include an end-of-line in the http result hence the echo on Mac/*nix):

I’ve not tried aria2 yet, but might provide commands for that in the future.

These are the Linux permutations for akamai:

curl whatismyip.akamai.com && echo
curl ipv4.whatismyip.akamai.com && echo
curl ipv6.whatismyip.akamai.com && echo
curl ipv4.whatismyip.akamai.com && echo && curl ipv6.whatismyip.akamai.com && echo

The last two are convenient when you have both IPv4 and IPv6 configured on “the outside”.

You can replace curl with wget -q -O – (which outputs to stdout) for each command. You can even ommit the http:// (as that is the default protocol for both curl and wget).

Read the rest of this entry »

Posted in *nix, *nix-tools, Apple, bash, bash, Batch-Files, cURL, Development, Linux, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, OS X 10.10 Yosemite, OS X 10.8 Mountain Lion, OS X 10.9 Mavericks, Power User, Scripting, Software Development, SuSE Linux, wget | Leave a Comment »

Fighting with IPv6 – There and back again

Posted by jpluimers on 2016/01/09

Interesting:

During the last weeks I finally got my hands dirty with IPv6. A comment on my blog and an email informed me that my server (hosting this blog) is not reachable via IPv6, albeit it has an IPv6 address. That said, I tried to get that running and fell into several holes, due to firewalls, […]

Source: Fighting with IPv6 – There and back again

Posted in *nix, *nix-tools, Apache2, iptables, Linux, Power User | Leave a Comment »

paping – Cross-platform TCP port testing, emulating the functionality of ping (port ping) – Google Project Hosting

Posted by jpluimers on 2015/12/22

Hopefully someone will move this to Github before Google code goes down: paping – Cross-platform TCP port testing, emulating the functionality of ping (port ping) – Google Project Hosting.

Paping (pronounced pah ping) is a computer network administration utility used to test the reachability of a host on an Internet Protocol (TCP/IP) network and to measure the time it takes to connect to a specified port

–jeroen

via:

Posted in *nix, *nix-tools, Communications Development, Console (command prompt window), Development, Internet protocol suite, Power User, TCP, Windows | 1 Comment »

Index of /materials/haxpo2015ams

Posted by jpluimers on 2015/11/27

It feels like yesterday, but haxpo2015ams was already six months ago!

Session materials index:

Index of /materials/haxpo2015ams

[ICO] Name Last modified Size Description

[PARENTDIR] Parent Directory
[ ] D1 – Frank Breedijk – Help my Security Officer is Allergic to DevOps.pdf 2015-05-28 07:19 6.7M
[ ] D1 – Lisha Sterling – Hacking Humanitarian Project for Fun and Profit.pdf 2015-05-27 18:27 6.1M
[ ] D1 – Marc Newlin – ReDECTed.pdf 2015-05-27 16:56 1.7M
[ ] D1 – P. Mason, K. Flemming A. Gill – All Your Hostnames Are Belong to Us.pdf 2015-05-27 16:03 2.8M
[ ] D1 – Wouter van Rooij – Future Privacy.pdf 2015-05-27 16:16 715K
[ ] D2 – Bob Baxley – Privacy and Security in the Internet of Things.pdf 2015-05-28 17:00 7.1M
[ ] D2 – Edwin Sturrus – Data Security and Privacy in the Age of Cloud.pdf 2015-05-28 15:24 1.2M
[ ] D2 – Jessica Maes – Privacy in Digital Society.pdf 2015-05-28 12:18 4.1M
[ ] D2 – Jimmy Shah – BYOD is Now BYOT – Current Trends in Mobile APT.pdf 2015-05-28 15:55 3.6M
[ ] D3 – Jaya Baloo – Crypto is Dead Long Live Crypto.pdf 2015-05-29 17:17 4.4M
[ ] D3 – Jeroen van der Ham – Responsible Disclosure in The Netherlands.pdf 2015-05-29 16:37 1.7M
[ ] D3 – Oliver Matula and Christopher Scheuring – Evaluating the APT App Armor.pdf 2015-05-29 11:55 3.9M
[ ] D3 – R. Schaefer and J. Salazar – Pentesting in the Age of IPv6.pdf 2015-05-29 16:22 1.8M
[ ] D3 – Ruben van Vreeland – New Attack Vectors for Exploiting Web Platforms.pdf 2015-05-29 11:55 816K
[ ] HAXPO HIGHLIGHT – Andrew Tanenbaum – MINIX3.pdf 2015-05-28 15:19 9.2M
[ ] HAXPO HIGHLIGHT – Eleanor Saitta – Designing Security Outcomes.pdf 2015-05-29 15:15 1.4M
[ ] HAXPO HIGHLIGHT – Reuben Paul – The A-to-Z of CyberSecurity.pdf 2015-05-28 15:19 17M
[ ] HAXPO WELCOME – Richard Thieme – Too Much to Know.pdf 2015-05-27 13:37 6.3M

Apache/2.4.7 (Ubuntu) Server at haxpo.nl Port 80

–jeroen

Posted in *nix, *nix-tools, Encryption, Hashing, https, LifeHacker, OpenSSL, PKI, Power User, Public Key Cryptography, Security, Signing | Leave a Comment »

Recommended read: What I learned while securing Ubuntu – major.io

Posted by jpluimers on 2015/11/24

Applying security hardening standards and generally securing Ubuntu has been a challenge.

Tell me about it (:

–jeroen

Source: What I learned while securing Ubuntu – major.io

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

StartSSL indeed offers free Class1 certificates for any subdomain

Posted by jpluimers on 2015/11/20

Thanks Craine for answering:

StartSSL does in fact offer free SSL certs for subdomains, though they are Class 1 certificates.

It works: just start the process for the domain, then when you get to the step for entering a subdomain, enter any one (of course www works, but you can do the process multiple times so register certificates for multiple subdomains).

–jeroen

via: tls – Free second-level domain SSL certificate – Information Security Stack Exchange

Posted in *nix, *nix-tools, Apache2, https, Power User, Security | Leave a Comment »

7 Linux Grep OR, Grep AND, Grep NOT Operator Examples

Posted by jpluimers on 2015/10/31

Question: Can you explain how to use OR, AND and NOT operators in Unix grep command with some examples?

Source: 7 Linux Grep OR, Grep AND, Grep NOT Operator Examples

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

Research notes on Diffie Hellman over WebSockets over a MittM http proxy to setup an encapsulated secure channel

Posted by jpluimers on 2015/06/17

Inspired by CloudFlare Keyless SSL, I have this idea of using Diffie Hellman over WebSockets over a MittM based http proxy (which intercepts and decrypts HTTPS traffic) like mitmproxy (but them from a commercial vendor to inspect web traffic) to setup an encapsulated secure channel.

I know SSH uses Diffie Hellman to setup a secure channel over a binary TCP connection.

Binary communication over HTTP usually means WebSocket.

I don’t want WebSSH (which does use WebSockets, but is probably filtered by the MitM proxy anyway).

Maybe either of these open source tools will work:

If these don’t work, I need to do more research.

Since I use C# and .NET for much of my work, I started the WebSocket over HTTP C# query.

c# – How to use proxies with the WebSocket4Net library – Stack Overflow.

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, HTTP, Internet protocol suite, Linux, Power User, SSH, SuSE Linux, TCP, WebSockets, Windows, Windows-Http-Proxy | Leave a Comment »

Moving my BitBucket mercurial repository to git was a lot harder than I hoped for (but moving to GitHub was easy)

Posted by jpluimers on 2015/06/10

After reading Converting Hg repositories to Git directed me into reading Bitbucket: Converting Hg repositories to Git I hoped moving my Mercurial repository on BitBucket to a Git repository would be something like following the steps.

It wasn’t.

First of all, hg-git on a Windows system requires Python or TortoiseHg. Neither of these I wanted to install for a one-off conversion.

So I took a throw-away Linux VM, and did the steps below. But let me first explain why.

Motivation

My motivation for moving away from BitBucket to GitHub, especially for projects containing markdown documentation.

When writing documentation in Markdown, being able to in-line reference pictures or have relative-references to other documents. This works perfectly in local Markdown tools (like MarkdownPad 2 or LightPaper).

Read the rest of this entry »

Posted in *nix, *nix-tools, BitBucket, Development, DVCS - Distributed Version Control, git, GitHub, Linux, Mercurial/Hg, openSuSE, Power User, Source Code Management, SuSE Linux | Leave a Comment »