Solaris

Solaris SSH weird behaviour

Byetzion 03/07/2008

Sun likes IPv6. They like it so badly that they strive to use it in all cases.

Solaris 9 and 10 SSH daemon is bounded to IPv6, which leads to a problem when trying to forward X. Editing the config file /etc/ssh/sshd_conf and assigning the SSH daemon to IPv4 address (bind to address 0.0.0.0) is not enough. You need to make sure that the sshd process is started with the “-4” flag. In Solaris 10, it means editing /lib/svc/method/sshd and appending “-4” to the sshd start command.

I wonder what will happen after an upgrade or a patch…

Linux

Minimal Centos5 and SSH Server with X forwarding

Byetzion 10/10/2008

Installation of minimal selection of Centos 5 – only base, core and dialup selections, will leave a small-sized system, with the minimum required. This is a good setup to start setting up a firewall, and it lets you add any required package later using ‘yum’. This said, you cannot forward X over SSH at this…

Disk Storage

NetApp internals – how to add SSH keys without C$ nor NFS shares

Byetzion 03/04/2014

This post will describe the process of placing SSH keys using the internal ‘systemshell’ command of NetApp. As always – when doing something which the vendor did not intend you to do, do it very carefully. This data was obtained from NetApp forums, and while I do not have the original post to link (I…

Linux | Scripting/Programming | Uncategorized

Using yum with SOCKS proxy

Byetzion 30/06/201908/07/2019

SSH is a wonderful tool. One of its best features is the ability to pierce a firewall and let you go through it. If you’re using the dynamic port (-D as argument in command line openSSH), you actually get a SOCKS5 proxy over which you can transport all your desired data. This allows you the…

Linux

Disable IPv6 on RHEL5 or Centos5

Byetzion 16/05/2011

Recently, bonding module requires IPv6 module. There are two possible solutions. The first is to define zeroconf to off, by adding the following line to /etc/sysconfig/network : NOZEROCONF=yes The other method, which actually disables IPv6 is to insert into /etc/modprobe.conf the following line: options ipv6 disable=1 That should do the trick. You will need to…

Linux

SSH Client improvements

Byetzion 17/02/202417/02/2024

This article is going to concentrate several SSH client related topics and optimisations I have implemented. Amongst are: SSH client modular configuration Initially, the configuration for SSH client should be present (per-user) in the user’s home directory, under .ssh/config. I believe that this configuration file is not modular enough, and when you want to add/edit/remove…

Linux

Service account

Byetzion 27/05/2009

Assume you have a single purpose account. Maybe some service account, user which should run a single task ever, or even a case of a limited menu interface. You want your user(s) to reach there using SSH because that is the method to do it right and secured. You want it to be easy for…

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