One of the task installing a new FreeBSD box was dealing with IP addresses. Usually, google a web based calculater would do the trick. But today’s task is a bit different.
IPv6. A whole row of hexadecimal spinning in front of my eyes, just to figure out what is the range of IP that is usable. [...]
Tag Archives: networking
Network IP address calculator – for subnet and range of host
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BIND – name server error “the working directory is not writable”
Recently, there has been a few incident on vulnerabilities of DNS server being exploited. Fortunately, Bind have release patches soon enough for the rest of us to start covering up the loop holes.
After an upgrade or installations of ISC Bind DNS server 9.6 on a FreeBSD box, we will need to stop and start “named” [...]
ssh – How to encrypt/tunnel internet traffic through ssh
When using an insecure internet connection (e.g. wireless), it is a good practice to tunnel internet traffic through ssh. Tunneling through ssh provide encryption of the traffic starting from local computer to the point ends where ssh server is. It is especially important to encrypt the traffic out of the local PC when using un-secure [...]
SmokePing – How setup logging (or debuging)
SmokePing is an utility to keep track of the network latency from your network to various site. Its output are recorded in graph, for analysis purpose. Its configuration are simple and easy to setup. But some times, logging are needed to debug some probes failed to output to graph. The logging setup will need to [...]
FreeBSD – Quick install guide (aka How to install FreeBSD)
Much great have been said on FreeBSD;
the license has all the freedom you need
server apps setup are mostly manual. no wizard of oz, no gui. Which makes the administrator have control over everything.
it boots faster
its stability is like rock, hard to crash
default installation are lean and mean. Is meant to be built from [...]
Linux – Shorewall firewall with PPTP VPN dialup client
PPTP VPN uses protocol GRE on two way, both inbound and outbound. Setting up the firewall to allow PPTP VPN dialup client (e.g. Ubuntu’s NetworkManager) to use protocol GRE is just a few steps in adding rules and interfaces. This post is based on the previous post “How to set up Shorewall firewall (alternate to [...]
Linux – How to set up Shorewall firewall (alternate to FireStarter)
There are a few option of firewall interface available on Linux for iptables, both GUI (Graphical User Interface) and CLI (Command Line Interface). FireStarter user interface on GUI is easy to use and configure. The only problem is it does not work properly with PPTP VPN dialup, it blocks protocol GRE. It does provide a [...]
Ubuntu – How to resume NetworkManager managing network interface
After manually editing /etc/network/interfaces for dynamically assigned IP or static IP, Network Manager (the icon sits on the upper panel with 2 monitor) stops working. Specifically it stop managing interface, but manually assigning IP through “ifconfig” or editing config files (/etc/network/interfaces) still works. Another reason NetworkManager stop working is after applying some updates between Intrepid [...]
Freebsd – How to install FreeBSD as your Desktop
UPDATE : After testing PC-BSD for a while (more then 6 months), PC-BSD indeed is a FreeBSD variant that is superior in Desktop environment. Its user friendly installation and configuration have make FreeBSD so much more suitable running as an Desktop. Unless you’re interested in figuring out how to tweak and turn FreeBSD to work [...]
FreeBSD – Combine 2 (or more) NIC using network link aggregation and load balance (aka round robin)
Hard disk are getting bigger and bigger. Network interface card (NIC) and switch are getting cheaper and cheaper. It usually means more services can squeeze into a server. Combining multiple network interface into 1 big pipe would be a big plus for services that is bandwidth hungry. e.g. file server, email server & etc
Combining 2 [...]
