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For the term "ssh".

SSH Reverse Tunnel Not Working Mystery

When using autossh to create a reverse tunnel, sometimes, mysteriously (for the moment), on the remote server, the connect is refused, returning this message in syslog/messages autossh[7451]: 127.0.0.1:{port}: Connection refused The problem is autossh process is running (pid 7451) but frozen ( thats the mystery ) The solution: sudo kill $(ps aux | grep ‘autossh’ | awk ‘{print $2}’)

Disable IPV6 Debian

sudo vi /etc/sysctl.conf # to disable IPv6 on all interfaces system wide net.ipv6.conf.all.disable_ipv6 = 1 # Uncomment the next two lines to enable Spoof protection (reverse-path filter) # Turn on Source Address Verification in all interfaces to # prevent some spoofing attacks net.ipv4.conf.default.rp_filter=1 net.ipv4.conf.all.rp_filter=1 # Do not accept ICMP redirects (prevent MITM attacks) net.ipv4.conf.all.accept_redirects = 0 #net.ipv6.conf.all.accept_redirects = 0 #...

Setup a LAMP Server on Debian or Ubuntu

This setup is for Virtual Host server – not a dedicated server with a single domain SSH to your server ssh root@IP Update Debian/Ubuntu apt-get update && apt-get upgrade –show-upgraded -y Create User How To Create a User in Linux Setup SSH for Remote Access With GPG Keys – No Password How To Setup SSH for Remote Access IMPORANT –...

Block All Traffic to Your New Remote Server

I block all traffic to a new server while I setup users and environment using Netfilter AKA iptables. Nothing else gets in or out of the box but me. This requires 2 scripts actually. One to close the machine to all other IPs but mine, and one to “unblock”. You need to unblock while installing other software, re. LAMP, when...

Setup SSH for Accessing Remote Server Without Password

On the Remote Server Logged in As User or as root but in users home sudo mkdir ~/.ssh sudo chmod 700 ~/.ssh && chmod 600 ~/.ssh/* On you local (desktop) assuming you have already created your GPG Keys cat ~/.ssh/id_rsa.pub | ssh root@example.com 'cat – >> ~/.ssh/authorized_keys'

Tunnel MySQL Over SSH

Assuming On a “remote.com” server that we will connect to from our LocalMachine 1) MySQL database named “database” 2) MySQL database is running on remote server “remote.com” 3) MySQL is running and listening on (standard) localhost:port “127.0.0.1:3306” 4) MySQL username “mysql_user_name” 5) MySQL password “mysql_password” 6) SSH must be listening on port 9999 7) SSH AllowUsers “ssh_user_name” 8) SSH password...

Start Reverse Tunnel on boot using autossh for Debian 7

As usual, most of the how-to guides out there are too brief (I’m guilty) or apply to other distros: This works on Linux Debian 7 all-around, and this is a complete how to. It works. You just have to follow a very long thread. No A.D.D. here! We will create a Persistent Reverse SSH Tunnel between 2 machines using autossh....

Cubox-i2 Config Setup

Download Gunnar Wolf’s Debian Wheezy https://people.debian.org/~gwolf/ Also working: Ubuntu sudo dd if=ubuntu-oneiric-freescale.img of=/dev/mmcblk0 Android 4.3 sudo dd if=beta-11-dec-2013-i2.img of=/dev/mmcblk0 Not working: Debian Jesse sudo dd if=debian-jessi-4-july-2014.img of=/dev/mmcblk0 Copy to SDmicro sudo dd if=cubox.img of=/dev/mmcblk0 password for root is cubox-i #vi /etc/apt/sources.list #deb http://download.solid-run.com/pub/solidrun/cubox/repo/debian cubox main #deb-src http://download.solid-run.com/pub/solidrun/cubox/repo/debian cubox main vi /etc/network/interfaces auto lo iface lo inet loopback allow-hotplug eth0 iface...

Linux Debian How To Backup System and Data

Command of the Day :: You want to backup a remote machine (server) from a local (desktop) onto the local; type on local/desktop: sudo rsync -azv -e "ssh -i /home/username/.ssh/id_rsa" username@server.seleads.com:/home/username/ /home/username/server_backup_on_local_desktop username@server.seleads.com:/home/username/ (this is the server login and directory being backed up) -i /home/username/.ssh/id_rsa (if you do not want to use password authentication – key is on local/desktop) ——————–...

Harden Ubuntu Server 12.04 LTS

Its not enough to harden just Ubuntu. Its necessary to harden the rest of LAMP as well. So here is how I do it. Harden MYSQL sudo mysql_secure_installation answer Yes to all questions (but no need to change password) Harden PHP – and tune performance sudo apt-get install php5-suhosin sudo vi /etc/php5/apache2/php.ini uncomment this code or update setting max_execution_time =...

Install Rsync

Rsync Installation Instuctions sudo apt-get install rsync sudo vi /etc/rsyncd.conf copy into rsyncd.conf motd file = /etc/rsyncd.motd [servername] path = /home/username comment = This is the path to folder on the server uid = nobody gid = nobody read only = false auth users = username secrets file = /etc/rsyncd.scrt change username/servername sudo vi /etc/rsyncd.motd any message you want sudo...

Create User on Debian and Ubuntu

Users and Groups Users are located in /etc/passwd Groups are located in /etc/group The administrative ROOT account is disabled by default in Ubuntu . If you wish to enable the root account, simply give it a password by typing sudo passwd To disable the root account sudo passwd -l root The initial user created by the Ubuntu installer is a...

How to Change or Disable SSH Timeout

On Client sudo vi /etc/ssh/ssh_config add line ServerAliveInterval 100 On Server sudo vi /etc/ssh/sshd_config add lines ClientAliveInterval 30 TCPKeepAlive yes ClientAliveCountMax 99999 From command line per session ssh -o ConnectTimeout=10 ssh -o ConnectTimeout -o BatchMode=yes -o StrictHostKeyChecking=no ServerAliveInterval operates on the ssh layer. It will actually send data through ssh, so the TCP packet has encrypted data in and a...

How to Rescue Hetzner VServer

Activate Rescue Mode Copy Password to clipboard Restart (reset) Server login ssh -v root@ip mount filesystem mount /dev/md2 /mnt or mount home mount /dev/md3 /mnt cd /mnt/___________ < be careful to always cd into mnt then the directory of choice or you will be cd into the rescue file system

Debian Environment Variables

And then I lived happily ever after – Fixed – BASH scripts executed from a user as sudo, resulted in the root ownership. In other words, a backup script executed by user became the property of root