[ILUG] UTV aDSL config change

[Gavin McCullagh]

Hi,

I found I couldn't reconnect to UTV Internet's aDSL service late on
Wednesday.  In case anyone comes across the same problem (and in case
anyone can explain the solution to me) I thought I'd mention it here.

Before I go any further the problem was that I was specifying "UTV-DUB-02"
as the login server in my chap-secrets.  Now I've had to change this to '*'
or it won't work.


I used Caolan's howto except that debian didn't seem to package a
"adsl-setup" script so I did that by hand.  So my /etc/ppp/chap-secrets
looked like:

# username 			server		password
csXXXXXX at adsl.utvinternet.ie     UTV-DUB-02        XXXXXXX

This worked fine for some months.  The syslog messages show connection
proceeding as follows:

==========================
Apr  2 12:42:30 robin pppd[20538]: Serial connection established.
Apr  2 12:42:31 robin pppd[20538]: Using interface ppp0
Apr  2 12:42:31 robin pppd[20538]: Connect: ppp0 <--> /dev/pts/0
Apr  2 12:42:31 robin pppoe[513]: PADS: Service-Name: ''
Apr  2 12:42:31 robin pppoe[513]: PPP session is 45946
Apr  2 12:42:31 robin pppd[20538]: No CHAP secret found for authenticating us to bas1.srl.dublin.eircom.net
Apr  2 12:42:49 robin pppd[20538]: CHAP authentication succeeded
Apr  2 12:42:49 robin pppd[20538]: Couldn't set pass-filter in kernel: Invalid argument
Apr  2 12:42:49 robin pppd[20538]: Cannot determine ethernet address for proxy ARP
Apr  2 12:42:49 robin pppd[20538]: local  IP address 194.46.84.78
Apr  2 12:42:49 robin pppd[20538]: remote IP address 195.218.116.25
==========================

It appears to get opportunity to login to eircom first but due to my
"UTV-DUB-02" line it doesn't try.  It then logs into UTV successfully.
They did once change the name (from the original "UTV-ESAT-01") and this
was easy to debug as I got two "No CHAP secret ...." errors, one for eircom
and one for the new UTV server and I just changed the name in my config.

The other day this started:

==========================
Apr  8 06:37:05 robin pppd[3276]: Serial connection established.
Apr  8 06:37:05 robin pppd[3276]: Using interface ppp0
Apr  8 06:37:05 robin pppd[3276]: Connect: ppp0 <--> /dev/pts/0
Apr  8 06:37:05 robin pppoe[12285]: PADS: Service-Name: ''
Apr  8 06:37:05 robin pppoe[12285]: PPP session is 28916
Apr  8 06:37:05 robin pppd[3276]: No CHAP secret found for authenticating us to bas1.srl.dublin.eircom.net
Apr  8 06:37:06 robin pppd[3276]: CHAP authentication failed: Request Denied
Apr  8 06:37:06 robin pppd[3276]: Connection terminated.
==========================

After a while of trying various things I replaced the "UTV-DUB-02" with
"*".  

# username 			server		password
csXXXXXX at adsl.utvinternet.ie     *        XXXXXXX

It immediately worked again but the logs are now slightly different.
Specifically, it now doesn't give me the "No CHAP secret" error.  This is
no great surprise as my CHAP secret is now configured for all servers.

==========================
Apr  9 11:04:26 robin pppd[5053]: pppd 2.4.2 started by root, uid 0
Apr  9 11:04:26 robin pppd[5053]: Serial connection established.
Apr  9 11:04:26 robin pppd[5053]: Using interface ppp0
Apr  9 11:04:26 robin pppd[5053]: Connect: ppp0 <--> /dev/pts/3
Apr  9 11:04:26 robin pppoe[5054]: PADS: Service-Name: ''
Apr  9 11:04:26 robin pppoe[5054]: PPP session is 55011
Apr  9 11:04:28 robin pppd[5053]: CHAP authentication succeeded
Apr  9 11:04:28 robin pppd[5053]: Couldn't set pass-filter in kernel: Invalid argument
Apr  9 11:04:28 robin pppd[5053]: Cannot determine ethernet address for proxy ARP
Apr  9 11:04:28 robin pppd[5053]: local  IP address 194.46.85.200
Apr  9 11:04:28 robin pppd[5053]: remote IP address 195.218.116.25
==========================

What I don't understand is, why was this necessary?  Something must
seemingly have changed in the way I get spotted as a UTV customer.  It
seems like I now have to try and authenticate to eircom with the
@utvinternet username (which presumably fails, or does it?) in order for
the process to work.

Anyone have an explanation for this?

Gavin

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