Re: Change resolv.conf for one particular DHCP server

On 22 Sie, 19:54, Stefan Monnier <monn...@xxxxxxxxxxxxxxxx> wrote:
My laptop is configured in the usual way to get his IP and DNS servers
by DHCP. But there's a cybercafé to which I like to go who's wireless
router is configured to return as DNS server some overloaded servers, even
though the AP is actually running a caching DNS proxy, so I sometimes
manually override the DHCP info by adding 192.168.0.1 in /etc/resolv.conf
just to speed up my connections.

Now, doing it manually is a pain, so I was wondering if anybody has an idea
how I could make this change automatically.

I'm currently using wpa_supplicant + dhclient3 + resolvconf under Debian
testing if that matters.

I'm currently using an ugly hack:

#!/bin/sh

resolvconf=/etc/resolvconf/run/resolv.conf
trigger_re="nameserver 4\\.2\\.2\\.2"
extraline="nameserver 192.168.0.1"

(rm "$resolvconf";
sed "/$trigger_re/i# Next line added by $0\\n$extraline" \
"$resolvconf" ) <"$resolvconf"

in /etc/resolconf/update-libc.d and was wondering if there's
a cleaner solution.

Stefan
In file /etc/dhclient.conf put
lease
{
interface "wlan0";
option domain-name-servers 153.19.250.100;
}
where 'wlan0' is your wireless interface name.

But that will be used everywhere, right? I only want to change the
resolv.conf when I use the machine at that one cybercafé. The 192.168.0.1
address I need to use there doesn't even work in most other places (at
home and at work, at least).

Stefan


yes, you are right
as far as I know there is no possibility to do conditional changes
via dhclient.conf file, but on every dhcp update there can be some
script started, so check this way

MR

.

Relevant Pages

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