Bug 16881

Summary: First packet send (first dns lookup) fails with on demand dialing
Product: [Retired] Red Hat Linux Reporter: Hans de Goede <hdegoede>
Component: wvdialAssignee: Nalin Dahyabhai <nalin>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 7.1   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2004-06-02 14:33:24 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Hans de Goede 2000-08-24 15:24:35 UTC 
Setup a pots ppp link with on demand dialing, do:
telnet <existing and resolving host>

And you get a:
hostname lookup failure

Response, notice the failure message instead of the "Unknown host" message
given when you try to telnet to an unknown host.

I tried doing "echo 1 > /proc/sys/net/ipv4/ip_dynaddr", before ifupping the
ppp interface as documented, but that doesn't help.

I tried this with:
-a ppp asigned DNS, but there were already other correct and public
available DNS entries in /etc/resolv.conf.
-the correct (normally ppp asigned DNS) in /etc/resolv.conf and PEERDNS
off.

Also see bug 16640 where this was first discussed.
Comment 1 Hans de Goede 2004-06-02 14:33:24 UTC 
This bug is ancient and I don't have the setup to reproduce this
anymore what do we do?