Really scary exploit attack in wild, which affects all browsers under any desktop operating systems including MS IE, Linux, Apple safari, Opera, Firefox and Adobe flash. Any website that uses CSS and IFRAME (used to serve ads) can be used to attack on end users as attacker is able to take control of the links that your browser visits. In this article I will share few tips to stop this deadly attack until final patch is released by vendors.
TELNET (TELecommunication NETwork) is a network protocol used on the Internet or local area network (LAN) connections. It was developed in late 60s with RFC 15. Telnet is pretty old for login into remote system and it has serious security problem. Most admins will recommend using Open SSH (secure shell) for all remote activities. But you may find users who are still demanding telnet over ssh as they are comfortable with Telnet. Some users got scripts written in 90s and they don’t want to change it. So what do you do when users demands telnet?
Last week one or more of Red Hat’s servers got cracked. Now, it has been revealed that both Fedora and Red Hat servers have been compromised. As a result Fedora is changing their package signing key. The intruder was able to sign a small number of OpenSSH packages relating only to Red Hat Enterprise Linux 4 (i386 and x86_64 architectures only) and Red Hat Enterprise Linux 5 (x86_64 architecture only). This update has been rated as having critical security impact.
Red Hat has shipped a new version of its dnsmasq caching software to plug source UDP port bug. This could have made DNS spoofing attacks (CVE-2008-1447) easier. Dnsmasq is lightweight ultra fast dns cache server forwarder and DHCP server. It is designed to provide DNS and, optionally, DHCP, to a small network.
This article demonstrated how to install Asterisk on a Fedora Linux system and configure SIP users, extensions, and voicemail. We installed all user data into an LDAP database in order to keep it consolidated.