What’s New in Ubuntu Server 12.04 LTS | Ubuntu Server 12.04 will be released on 26 April 2012. Ubuntu 12.04 is supported with security updates until 2017 which makes Ubuntu LTS an attractive choice for use as a server. At the time of this blog post, 12.04 is still in Alpha 1 so many changes are still occurring. However, I will give you
Troubleshoot ssh Authentication Failure | ssh has a built in debug mode from the client side to provide information in troubleshooting a connection. This will provide information such as mismatch in client/server configuration options, key conflicts, permission problems, and various other useful tidbits. To connect in debug mode, simply add -vvv to the end. You can use up to three
Check Site for Malware with Google Safe Browsing | The following URL can be used to check a site for malware: http://www.google.com/safebrowsing/diagnostic?site=example.com The diagnostic url works to check any site, replacing the domain at the end with the site you wish to check. http://www.google.com/safebrowsing/diagnostic?site=xxxxxxxx.xxx check scottlinux.com Infected? Eek my site is serving up malware! This page has some info on what to do if
BlindElephant – Web Application Fingerprinting | BlindElephant is a nifty python app that fingerprints web applications such as wordpress, drupal, mediawiki, phpbb, joomla, and many others to determine the version of the web application. BlindElephant works via a new trendy technique of fetching static elements of the web app such as .js, .css, and other core files then running a checksum
Postfix Empty Mail Queue | To empty / clear / delete the Postfix mail queue, simply issue this command: $ sudo postsuper -d ALL The output will look similar to this: $ sudo postsuper -d ALL postsuper: Deleted: 4 messages That’s it!
TCP/OS Fingerprinting Tools – p0f and nmap | The particular way an operating system or device sends and receives TCP packets provides a unique fingerprint. TCP header information such as the window size, TTL, overall SYN packet size, MSS, MTU and so forth can help identify the OS. This is known as OS fingerprinting. The best known passive TCP fingerprint tool is p0f,
Disable SSLv2 in Cyrus IMAP server | Cyrus often ships by default with SSLv2 enabled which can be considered a security vulnerability. Here’s how to disable SSLv2 in your Cyrus IMAP server! 1. Edit the file /etc/imapd.conf sudo nano /etc/imapd.conf Find the following line, and remove the SSLv2 indication where it may be found: Before: tls_cipher_list: TLSv1:SSLv3:SSLv2:!NULL:!EXPORT:!DES:!LOW:@STRENGTH After: (below is the Debian
myhosting.com Linux VPS Review | myhosting.com provides Linux VPS hosting for cheap. I recently had the opportunity for an in-depth test drive and so here is the scottlinux review! myhosting.com Linux VPS offerings runs on Virtuozzo Containers, the commercial version of OpenVZ offered by Parallels. Wikipedia has some general details on how this works and also some of the limitations.
Add User to Group in Linux | In Linux, the command gpasswd can be used to add or remove users from a group. I’ll show you how! To add a user to a group, use tack a: $ sudo gpasswd -a user group The output looks like this: $ sudo gpasswd -a joe admin Adding user joe to group admin To remove