Hi all!
This question is, at best, somewhat peripheral to Centos, but I'm
hoping to be forgiven, and that someone here can give me a clue.
I've just brought up a nameserver on my household LAN, bind9 on a
Raspberry Pi.
The connection with Centos is this: my main desktop is C7, and its
hardwired network is also manual, not dhcp. I've edited the ipv4 config
(in NM) and changed the DNS settings from 192.168.2.1 (the router) to
192.168.2.2 (the RPi). I've also manually tweaked /etc/resolv.conf
to contain 192.168.2.2 instead of 192.168.2.1.
works fine. until I fire up a vpn. having done that, looking in
/etc/resolv.conf (while the vpn is connected) it has reverted to
192.168.2.1.
after shutting down the vpn, 192.168.2.1 remains in resolv.conf
what am I overlooking here?
now the not-so-Centos-related question:
I've changed the dhcp settings in my router so it should deliver
192.168.2.2 to the dhcp clients instead of 192.168.2.1. And it does,
sorta. all the systems that use DHCP, now are configured with two
DNS server addresses, 192.168.2.2, and 192.168.2.1. And I have no
clue why 192.168.2.1 is still showing. Both windows and Linux systems
are showing this behavior.
Clues appreciated!
and thanks in advance.
--
---- Fred Smith -- fredex at fcshome.stoneham.ma.us
-----------------------------
But God demonstrates his own love for us in this:
While we were still sinners,
Christ died for us.
------------------------------- Romans 5:8 (niv) ------------------------------
--On Thursday, April 20, 2017 12:34 AM -0400 Fred Smith <fredex at fcshome.stoneham.ma.us> wrote:> works fine. until I fire up a vpn. having done that, looking in > /etc/resolv.conf (while the vpn is connected) it has reverted to > 192.168.2.1. > > after shutting down the vpn, 192.168.2.1 remains in resolv.confWhich VPN? It's not uncommon for VPN software to change the resolver setting to point to your VPN peer's DNS, so that all traffic goes through the VPN, including your DNS traffic. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
On Thu, Apr 20, 2017 at 12:32:41AM -0700, Kenneth Porter wrote:> --On Thursday, April 20, 2017 12:34 AM -0400 Fred Smith > <fredex at fcshome.stoneham.ma.us> wrote: > > >works fine. until I fire up a vpn. having done that, looking in > >/etc/resolv.conf (while the vpn is connected) it has reverted to > >192.168.2.1. > > > >after shutting down the vpn, 192.168.2.1 remains in resolv.conf > > Which VPN? It's not uncommon for VPN software to change the resolver > setting to point to your VPN peer's DNS, so that all traffic goes > through the VPN, including your DNS traffic.I use OpenConnect VPN for this pareticular task. and yes I know the vpn changes it, then should put it back when one disconnects. problem is, where is it getting the old address from? It isn't in the resolv.conf before the vpn is started, and it is not in the NM setups, anywhere, and it isn't in any of the files in /etc/sysconfig/network*, so where is it coming from? And that particular system is NOT using DHCP. Beats me! Fred -- ---- Fred Smith -- fredex at fcshome.stoneham.ma.us ----------------------------- God made him who had no sin to be sin for us, so that in him we might become the righteousness of God." --------------------------- Corinthians 5:21 ---------------------------------