Scripts to set up the interfaces

[terrordrone]

Im in need of running scripts when i get to college and reset em when i get to my room.
I need static ip, proxy address , netmask and DNS to be set.. IN COLLEGE (wired & wireless)
When i come back to the room.. i need both the interfaces to be in dhcp

These are the scripts ive written.. doesnt work completely.. doesnt set the default gateway

wired - coll

sudo -S ifconfig wlan0 down
sudo ifconfig eth0 up
sudo ifconfig eth0 address 192.168.13.61 netmask addr 255.255.0.0

wireless - coll

sudo -S ifconfig eth0 down
sudo modprobe ndiswrapper
sudo ifconfig wlan0 up
sudo ifconfig wlan0 address 192.168.14.61 netmask addr 255.255.0.0
sudo iwconfig wlan0 essid any
kwifimanager

I do not know how to set the DNS and also the default gateway addresses
another issue i face while i use knetworkmanager to this is.. i need to disable eth0 whenever i need to use wlan0 to use the net.

I do not know about setting dhcp as well.. please throw some light on that as well.

Please do help me with the scripts..

Thanks

[terrordrone]

Re: Scripts to set up the interfaces

Can anyone please tell me how to set the Default gateway for an interface.. ?
Also how do i set the DNS address..
I need commands to do these.. as i need to include them in a script
Thanks

[lingenfr]

Re: Scripts to set up the interfaces

Try this:

ip route add default via 1.2.3.254 Set default gateway to 1.2.3.254

I think that you will have to do the dns change by swapping resolv.conf files like this:

sudo cp /etc/resolv.room /etc/resolv.conf (and vice versa for resolv.class)
sudo /etc/init.d/network restart (restart networking)

The format for the resolv.conf file is as follows:

-------------------
# /etc/resolv.conf - DNS setup file
#
# possible entries are:
#
# domain <domain> Local domain name. If not present, the
# gethostbyname syscall is used to
# determine the local domain name.
#
# search <list_of_domains> Search list for hostname lookup.
# The search list is normally determined
# from the local domain name but it
# can be set to a list of domains.
#
# nameserver <ip_addr> Define which server to contact
# for DNS lookups. If there are
# multiple nameserver lines (Max=3),
# they are queried in the listed order.
#
# !!! Automatically generated by LISA from /etc/system.cnf. Do not edit !!!
#
#domain
#search
nameserver 192.168.0.1
___________________

So in resolv.room and resolv.class, you will need to have the appropriate nameserver entries. I think that some of the networking apps allow profiles where you could capture this that might make it easier. I am not a knetworkmanager fan. One of the smarter folks here may have a better idea, but I believe this will work.