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Posted by jpluimers on 2020/04/10
A few links for my archive:
–jeroen
Posted in Communications Development, Development, Internet protocol suite, Security, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2020/03/16
I love short and to the point examples. The list of permutations for scp is at [WayBack] Linux – How to Securely Copy Files Using SCP examples.
–jeroen
Posted in *nix, *nix-tools, Development, Internet protocol suite, Power User, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2020/03/10
In a lot of ssh-keygen related posts, you still see DSA being mentioned, though that has been deprecated and later removed from OpenSSH.
I wondered why, so I did some digging.
TL;DR: it’s complicated:
Some of the related topics cannot be archived in the WayBack machine or refuse being archived at Archive.is, so here is a list of partially archived relevant links:
–jeroen
Posted in Communications Development, Development, Internet protocol suite, Power User, Security, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2019/03/15
For me, scp is like tar; somehow I Google this every time…
~ # ssh username@192.168.71.123 ... ~ # ls -alh `find /vmfs/volumes/ | grep -w W81Entx64CI | grep '\.vmdk$'` -rw------- 1 root root 200.0G Aug 26 22:48 /vmfs/volumes/552f5788-33e30274-8dba-001f29022aed/VM/PSO/W81Entx64CI/W81Entx64CI-flat.vmdk -rw------- 1 root root 500 Aug 19 16:36 /vmfs/volumes/552f5788-33e30274-8dba-001f29022aed/VM/PSO/W81Entx64CI/W81Entx64CI.vmdk
~ # cd /vmfs/volumes/Samsung512NVME/PSO/VM/W81Entx64CI/ ~ # time scp -v username@192.168.71.123:/vmfs/volumes/552f5788-33e30274-8dba-001f29022aed/PSO/W81Entx64CI/W81Entx64CI-flat.vmdk W81Entx64CI-flat.vmdk
I don’t know what’s worse–the fact that after 15 years of using tar I still can’t keep the flags straight, or that after 15 years of technological advancement I’m still mucking with tar flags that were 15 years old when I started.
The last line will logon over ssh and shows the file transfer in a verbose way.
Requirements:
Via [WayBack] shell – How to scp a folder from remote to local? – Stack Overflow (thanks [WayBack] Gryphius)
Image source: [WayBack] xkcd: tar
–jeroen
Posted in Communications Development, Development, Internet protocol suite, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2019/01/22
Note: if the system you SSH from is ever compromised, then assume the passwordless targets are also compromised!
–jeroen
Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Linux, openSuSE, Power User, SSH, SuSE Linux, TCP, Tumbleweed | Leave a Comment »
Posted by jpluimers on 2018/12/24
If you want to setup an account on your system that will be used only to transfer files (and not to ssh to the system), you should setup SFTP Chroot Jail.
This explains how: [WayBack] How to Setup Chroot SFTP in Linux (Allow Only SFTP, not SSH)
Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, SFTP, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2018/12/12
Having mainly used ssh as a means to connect to a shell on remote machines and occasionally a manual port forward.
I never noticed autossh where you can automate the ssh logon process to keep permanent port forwards up and running. Cool!
It’s on my research list now, as this will be useful probably sooner than later:
My initial impression is that autossh is a wrapper around the regular ssh client that allows reconnection upon communication failures.
–jeroen
Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2018/11/07
I need to script this one day: [WayBack] How to Setup Chroot SFTP in Linux (Allow Only SFTP, not SSH)
–jeroen
Posted in *nix, Awk, bash, Communications Development, Development, Internet protocol suite, Power User, Scripting, Software Development, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2018/06/11
In this article, we will explain you how to restrict a SSH user access to a specific directory using chrooted jail in Linux systems.
Source: [WayBack] Restrict SSH User Access to Certain Directory Using Chrooted Jail
via: [WayBack] Restrict #SSH User Access to Certain Directory Using Chrooted Jail #Linux – Linux Inside – Google+
–jeroen
Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, SSH, TCP | Leave a Comment »
Posted by jpluimers on 2018/01/20
Before upgrading Tumbleweed this week, you need to review your openssh config.
This is not mentioned in Review of the week 2018/03 – Dominique a.k.a. DimStar (Dim*), but very important.
So be sure to read these before upgrading:
If you forget to review /etc/ssh/sshd_config, you get this in journalctl if you have specified your own MACs for instance when hardening according to [WayBack including rimemd160] Secure Secure Shell:
Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, SSH, TCP | Leave a Comment »
The Wiert Corner - irregular stream of stuff 