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Bug 58577 - Dialup local IP address = LAN hostname address
Dialup local IP address = LAN hostname address
Product: Red Hat Linux
Classification: Retired
Component: ppp (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Thomas Woerner
Aaron Brown
Depends On:
  Show dependency treegraph
Reported: 2002-01-20 08:25 EST by Jim Hobbs
Modified: 2007-04-18 12:39 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2004-08-16 11:58:39 EDT
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Provide option to retrieve local ip from remote host (4.51 KB, patch)
2002-01-26 18:42 EST, Michael Chapman
no flags Details | Diff
Use "noipdefault" pppd option when retrieving local IP from remote host (511 bytes, patch)
2002-01-26 18:44 EST, Michael Chapman
no flags Details | Diff

  None (edit)
Description Jim Hobbs 2002-01-20 08:25:33 EST
From Bugzilla Helper:
User-Agent: Mozilla/4.78 [en] (X11; U; Linux 2.4.9-13 i586)

Description of problem:
When using the normal (menu "dialup configuration") setups for dialing an ISP,
pppd often negotiates the hostname's LAN address (192.168.0.x) for the local IP
address.  This results in several dialup attempts required before successful

Note:  Adding "noipdefault" to /etc/ppp/options seems to have fixed this. 
Perhaps this should be done automatically when using dynamic address assignment?

Also note:  Happens only after setting up a LAN.  Didn't happen before this,
when the host address was only

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Configure system for use in a LAN, using an ethernet connection.
2. Set up a dialup network connection.
3. Attempt to make the dialup connection several times.

Actual Results:  pppd often successfully negotiates my hostname's LAN address as
the local IP address for the ppp connection, resulting in no communication.

Expected Results:  pppd should have allowed the ISP to dynamically assign the
local IP address.

Additional info:
Comment 1 Michael Chapman 2002-01-26 18:40:33 EST
I am having this problem too. After connecting, /sbin/ifconfig shows my ppp
connection's local ip address as, which is my eth0's address on my
home lan.

Perhaps rp3 should have an option to get the connection's local IP from the
remote host? I've constructed two patches that address this problem (one for
rp3, one for initscripts). Since they seem to work well I'll attach them to this
Comment 2 Michael Chapman 2002-01-26 18:42:47 EST
Created attachment 43635 [details]
Provide option to retrieve local ip from remote host
Comment 3 Michael Chapman 2002-01-26 18:44:51 EST
Created attachment 43636 [details]
Use "noipdefault" pppd option when retrieving local IP from remote host
Comment 4 Thomas Woerner 2004-08-16 11:58:39 EDT
Please verify this with a newer version of Red Hat Enterprise Linux or
Fedora Core and reopen it against the new version if it still occurs.

Closing as "not a bug" for now.

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