On my list of things to try some dotfiles including [WayBack] GitHub – gpakosz/.tmux: Oh My Tmux! My pretty + versatile tmux configuration that just works (imho the best tmux configuration).
–jeroen
Archive for June, 2020
GitHub – gpakosz/.tmux: Oh My Tmux! My pretty + versatile tmux configuration that just works (imho the best tmux configuration)
Posted by jpluimers on 2020/06/08
Posted in *nix, *nix-tools, Power User, tmux | Leave a Comment »
Good read for starting to intermediate ssh users is “SSH Essentials: Working with SSH Servers, Clients, and Keys | DigitalOcean” and pointers to more advanced reading material
Posted by jpluimers on 2020/06/08
For a really nice overview of most basic and intermediate usage of ssh, read [WayBack] SSH Essentials: Working with SSH Servers, Clients, and Keys | DigitalOcean.
It is large (printed to PDF it is 30+ pages in either A4 or Letter format) but well worth reading as it covers a lot in manageable bits.
Does it mean I won’t write about ssh again?
I will continue, as most of my blog posts are relatively short highlighting a small thing at a time (that is how I learn best, hopefully some of you do as well).
It does not explain really advanced stuff (like ProxyCommand), so here is a start of things I want to learn more about:
- Selecting how to connect
- [WayBack] How to force ssh client to use only password auth? – Unix & Linux Stack Exchange – this should be far easier using the
~/.ssh/configfile withHostentries.- this means I need to read more on [WayBack] ssh_config(5) – OpenBSD manual pages
- [WayBack] How do I connect to ssh with a different public key? – Server Fault
- ssh prefers public key authentication over keyboard interactive or password (see [WayBack] sshd(8) – OpenBSD manual pages: AUTHENTICATION) so if the server limits authentication tries and you have multiple public keys, then you run into
Too many authentication failures:
- [WayBack] How to force ssh client to use only password auth? – Unix & Linux Stack Exchange – this should be far easier using the
- JumpHosts / ProxyCommand:
- [WayBack] SSH ProxyCommand example: Going through one host to reach another server – nixCraft
- [WayBack] ssh – ProxyCommand use for multiple hops and prompt authentication – Unix & Linux Stack Exchange –
ncis not needed, so disregard the examples promoting it - [WayBack] OpenSSH/Cookbook/Proxies and Jump Hosts – Wikibooks, open books for an open world
- [WayBack] GitHub – moul/advanced-ssh-config: make your ssh client smarter
- [WayBack] Advanced Secure Shell: 6 Things You Can Do With SSH – DZone Security: Host matching, SFTP, KeepAlive, SSH Agent, Tunneling, X11 Forwarding, ProxyJump
- [WayBack] Advanced SSH Tunneling – Taos: tun (layer 3: IP packets) and tap (layer 2: ethernet frames) tunneling through TUN/TAP which are Tunneling Protocols.
- More hardening:
- SOCKS proxy and SSHFS:
- [WayBack] SSH tricks
- [WayBack] GitHub – libfuse/libfuse: The reference implementation of the Linux FUSE (Filesystem in Userspace) interface
- [WayBack] GitHub – libfuse/sshfs: A network filesystem client to connect to SSH servers
- [WayBack] Home – FUSE for macOS: [WayBack] FUSE for macOS · GitHub
- [WayBack] GitHub – osxfuse/osxfuse: FUSE extends macOS by adding support for user space file systems (merged from the now unsupported [WayBack] Fuse4X – The Easiest and Fastest Way to Create File Systems for Mac OS X; [WayBack] GitHub – fuse4x/fuse4x.github.com)
- [WayBack] GitHub – osxfuse/sshfs: File system based on the SSH File Transfer Protocol
- [WayBack] GitHub – osxfuse/filesystems: Example file systems
- A truckload of ssh related links: [WayBack] GitHub – moul/awesome-ssh: A curated list of SSH resources.
–jeroen
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Posted in *nix, *nix-tools, Power User, ssh/sshd | Leave a Comment »
“wmic” “access denied” “local administrator” “windows 10” – Google Search
Posted by jpluimers on 2020/06/05
On my research list: find out why a Local Administrator on Windows 10 Professional x64 did get “access denied” just when executing wmic:
- “wmic” “access denied” “local administrator” “windows 10” – Google Search
- [WayBack] WMIC permissions problem/quirk
- [WayBack] Access is denied in wmic Solved – Windows 10 Forums
- [WayBack] windows – Why am I getting “access denied” using “wmic”? – Server Fault
–jeroen
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Posted in Power User, Windows | Leave a Comment »
Hardening: sshd_config – How to configure the OpenSSH server | SSH.COM
Posted by jpluimers on 2020/06/05
If you want to harden your ssh server, read at least [WayBack] sshd_config – How to configure the OpenSSH server | SSH.COM.
After that use some ssh tools to check your config from the outside world. They work in a similar way as the TLS/SSL/https scans from Source: SSL Server Test (Powered by Qualys SSL Labs) or these console based scans and documentation references:
- /bin/bash based SSL/TLS tester: testssl.sh
- GitHub – ssllabs/research
- GitHub – ssllabs/ssllabs-scan: A command-line reference-implementation client for SSL Labs APIs, designed for automated and/or bulk testing.
Simiarly for SSH:
- GitHub – mozilla/ssh_scan: A prototype SSH configuration and policy scanner (Blog: https://mozilla.github.io/ssh_scan/)
- GitHub – arthepsy/ssh-audit: SSH server auditing (banner, key exchange, encryption, mac, compression, compatibility, security, etc)
- Rebex SSH Check
Then read further on more in depth SSH topics around key management:
- [WayBack] What is SSH Public Key Authentication – How to configure? | SSH.COM
- [WayBack] Configure SSH key based secure authentication | SSH.COM
- [WayBack] How to kill a Fortune 500? | SSH.COM
- [WayBack] SSH Key Management | SSH.COM
–jeroen
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Posted in Encryption, Hashing, https, HTTPS/TLS security, OpenSSL, Power User, Security, testssl.sh | Leave a Comment »
1. Inside the Terminal – Mac OS X For Unix Geeks, 4th Edition [Book]
Posted by jpluimers on 2020/06/05
The Terminal on Mac OS X / OS X / MacOS is very much like a Linux terminal, but there are also a lot of differences especially with keyboard, tab and process handling.
So this chapter is very much wort reading: [WayBack] 1. Inside the Terminal – Mac OS X For Unix Geeks, 4th Edition [Book]
–jeroen
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Posted in Apple, iMac, Mac, Mac OS X / OS X / MacOS, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, Power User | Leave a Comment »
Thread.Destroy deadlocks in finalization of COM+ dll’s…
Posted by jpluimers on 2020/06/04
Reminder to self that this is still broken:
[WayBack] Thread.Destroy deadlocks in finalization of COM+ dll’s This serious bug still exists in Delphi 10.2 after 12 years being reported! http://qc.embarcade… – 丽丽乌克 – Google+
Original report:
- WayBack1: QC Report # 29843 Thread.Destroy deadlocks in finalization of COM+ dll’s
- WayBack2: QC Report # 29843 Thread.Destroy deadlocks in finalization of COM+ dll’s
It was posted by Bart van der Werf, who also posted a workaround that is inside those WayBack links.
–jeroen
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Posted in Delphi, Development, Software Development | Leave a Comment »
Why Is SQLite Coded In C
Posted by jpluimers on 2020/06/04
Old, but still an interesting read: [WayBack] Why Is SQLite Coded In C and [WayBack] Appropriate Uses For SQLite.
TL;DR: SQLite – mainly competing with fopen has few dependencies and uses C in a boring way. I think that’s good.
Via: [WayBack] Why Is SQLite Coded In C – ThisIsWhyICode – Google+
–jeroen
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Posted in C, Database Development, Development, Software Development, SQLite | Leave a Comment »
Shell Extensions (.NET)
Posted by jpluimers on 2020/06/04
Over time it seems that Shell Extensions (.NET) [WayBack] have become possible.
In the past this was recommended against because Shell Extensions can be loaded by any process having a file dialog open, even if these did not expect .NET framework(s) to be hosted in-process.
It looks like that restriction has been alleviated with .NET 4.x where it is possible to in-process host multiple .NET frameworks: [WayBack] CLR Inside Out: In-Process Side-by-Side
Related:
- [WayBack] Create a Shell Extension Handler thumbnail extractor with .net? (new location of old WayBack: Create a Shell Extension Handler thumbnail extractor with .net? – MSDN Forums)
- Seems not relevant any more: [WayBack] Don’t do Shell Extension Handlers in .NET – Junfeng Zhang’s Musing
- [WayBack] c# – detect Windows Explorer copy operation – Stack Overflow
- [WayBack] winapi – Is it safe to block in callback of CopyFileEx? – Stack Overflow
- [WayBack] Any takers? The Windows API function CopyFileEx allows a callback function to be specified which is then being called when a part of the file has been … – Thomas Mueller (dummzeuch) – Google+
- [WayBack] CopyFileEx function (Windows)
–jeroen
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Some links on hooking anonymous methods to Delphi events
Posted by jpluimers on 2020/06/03
On my reading list are these:
- [WayBack] Is there a way in Delphi to assign an anonymous method to a button event? – Stack Overflow
- [WayBack] delphi – VCL events with anonymous methods – what do you think about this implementation? – Stack Overflow
- [WayBack] delphi – TProc<TObject> to TNotifyEvent – Stack Overflow
- [WayBack] delphi – VCL events with anonymous methods – what do you think about this implementation? – Stack Overflow
- [WayBack] DSharp.Core.Events.pas in delphisorcery | source code search engine
- [WayBack] Entropy Overload: Using anonymous methods in method pointers
–jeroen
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Posted in Conferences, Delphi, Development, Event, Software Development | Leave a Comment »
Methodologies are dead, long live methodologies – Mosh Choen – Medium
Posted by jpluimers on 2020/06/03
Worth re-reading every now and then: [WayBack] Methodologies are dead, long live methodologies – Mosh Choen – Medium.
Use your common sense, and assess your common sense is still based on thinking, not coloured.
Via: [WayBack] Mosh Choen (ik5) – Google+
–jeroen
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The Wiert Corner - irregular stream of stuff 