Has your DNS Server or Name Server ever gone down and clients are not able to resolve your website name to its IP address but you are able to go to the IP address directly and the site is there, well I might have an answer for you…… DNSFailOver.org.uk is a project I am working…
Tag: IP
Setting up DNS SRV for services like SIP and IAX…
This is a copy and paste from voip-info.org which helped me on a recent project… All credits go to the author of the post oej… DNS SRV A Domain Name Server (DNS) SRV record helps connecting to a SIP user in a similar way that an MX record helps email delivery. When you send email…
DHCP Relaying over IPSEC with a back end Centos 5.5 server…
Introduction This post is going to be a high level over view of having multiple sites all connecting back to a central office or hosted server in a data center using IPSEC VPN. Before starting make sure you have a IPSEC VPN tunnel up to the office or data center and validate connection both to…
Asterisk firewall and some useful tips….
So you have just installed asterisk on a linux system, and maybe you have also installed FreePBX to administer it, good for you. Firewalls.. Below i have listed a nice firewall script for use on a fresh centos+Asterisk installation. service iptables restart iptables -P INPUT ACCEPT iptables -F iptables -A INPUT -i lo -j ACCEPT…
DrayTek v3300 LAN High Availability (CARP)…
For the last few years I have been dealing with the Draytek v3300 and wanted to just do a brief write up on the LAN Fail Over abilities of this great device. The Draytek v3300’s High Availabily features enable the LAN to always access the internet and if you have proper external fail over, Internet…
802.1Q VLAN Tagging in Ubuntu…
To make use of IEEE 802.1Q VLAN tagging capabilities in Ubuntu you must first install the user mode programs for Virtual LAN support: sudo apt-get install vlan Next the 8021q kernel module must be loaded to enable VLAN support on a kernel level: sudo modprobe 8021q A quick review of lsmod will ensure the kernel module was loaded: lsmod…
Clustering with CentOS 5.5 and “luci”….
Ok, so i deal a lot with clustering of servers or “Nodes” and i will briefly show a really simple cluster which only has a shared or “Highly available” IP address in the case of one of the Nodes failing the shared IP address will still be up and pingable if you where to combine this…