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OpenBSD 101 - Basic

I got 2 customer that using 2 FreeBSD box serving as their gateway. Both are installed squid to cache their web browsing for the network. It's time to upgrade both of the box, I thinking of using OpenBSD as a gateway to see how OpenBSD perform.

I'm working on my virtualbox to test before deploy and implement them :)

Basic networking for OpenBSD

IP Forwarding:

Permanenant:
#vi /etc/sysctl.conf

Change from:
#net.inet.ip.forwarding=1

To
net.inet.ip.forwarding=1

You can change it on the spot by issuing the command
#sysctl net.inet.ip.forwarding=1

But this will revert to default once you reboot the machine, use permanent then.

Setting up IP address :

File : /etc/hostname.em0 (depends on your network card)
Structure : type address netmask broadcast others

#vi /etc/hostname.em0

inet 10.0.0.1 255.255.255.0 NONE

Setting interface for DHCP

#vi /etc/hostname.em0

dhcp

http://www.openbsd.org/faq/faq6.html

Once done, restart the service

#sh /etc/netstart

Setting up package :

Set PKG_PATH

#export PKG_PATH=ftp://ftp.jaist.ac.jp/pub/OpenBSD/5.1/packages/`machine -a`

Get list of available ftp mirror that nearest for you

http://www.openbsd.org/ftp.html

how to install :

#pkg_add -i vim

i - interactive, you can choose from variety of package available.

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