resolv.conf link disappearing

sawyert · Posted: Fri Jan 23, 2004 10:12 pm Post subject: resolv.conf link disappearing

Something is clobbering my resolv.conf link. I use pptp to connect to the vpn at work, so I normally have resolv.conf as a link pointing to resolv.conf.real, which then points to resolv.conf.pptp when I'm on the vpn.

However, something keeps removing the resolv.conf link and replacing it with a file again. Does anyone have any idea what this something could be?

Cheers,

Tim.

hadfield · Posted: Fri Jan 23, 2004 10:39 pm Post subject:

I believe that if you use DHCP it will overwrite the file, perhaps that's what's happenning. Try using hard links and see if that does anything.

sawyert · Posted: Fri Jan 23, 2004 11:01 pm Post subject:

Good idea, but the hard link is just clobbered by a soft one as soon as I connect to the vpn.

I'm not using DHCP, but a static ip.

Tim.

Chris W · Posted: Fri Jan 23, 2004 11:09 pm Post subject:

You probably need to to specify to your PPP/PPPOE software that it it should not use the DNS server information offered by the ISP. For Roaring Penguin this is in /etc/ppp/pppoe.conf, the PEERDNS settitng. For the net.ppp0 script this setting is in /etc/conf.d/net.ppp0.
_________________
Cheers,
Chris W
"Common sense: The collection of prejudices acquired by age 18." -- Einstein

sawyert · Posted: Sat Jan 24, 2004 11:31 am Post subject:

DNS works fine, it's just I'm losing my link.

It seems to happen at bootup. I had a resolv.conf link last night, and now I've rebooted I have a file again, which doesn't match resolv.conf.real or resolv.conf.pptp, so where'd it come from?

Any ideas gratefully received...

Tim.

Chris W · Posted: Sat Jan 24, 2004 11:43 am Post subject:

The link is disappearing because the PPP daemon is overwriting it with details provided by your ISP. Before it overwrites the file it makes a copy, which it restores on exit. Your link is now a real file.

Get the link straight then connect to your ISP but don't start the VPN. Look at the/etc/resolv.conf and I think you'll find it is a real file.
_________________
Cheers,
Chris W
"Common sense: The collection of prejudices acquired by age 18." -- Einstein

sawyert · Posted: Sat Jan 24, 2004 12:19 pm Post subject:

I don't think I'm using ppp to connect to the internet, only to the VPN. I use an ADSL router and connect to it through my LAN.

I've looked at /etc/conf.d/net.ppp0 and I think these are the relevant bits: Not sure about the default route line

DEFROUTE="yes" # Must pppd set the default route?
PEERDNS="no" # Should pppd set the peer dns?

I'd appreciate any thoughts...

Tim.

buzzin · Posted: Sat Jan 24, 2004 12:19 pm Post subject:

When i had this problem, just changing the attr of resolv.conf worked fine.

Just do below and no program will be able to modify or remove that file;

sawyert · Posted: Sun Jan 25, 2004 3:29 pm Post subject:

I don't think that will work for me because my disk is reiserfs not ext3. Also, the pptp code needs to be able to change the link from normal to VPN when I connect.

Thanks for the idea though

Tim.