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linux pppoe server troubles

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Evgeny Boksha

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Dec 25, 2003, 11:15:06 AM12/25/03

hi2all
I have problem with setting up pppoe-server.

On this page I get instruction for setting
http://listas.conectiva.com.br/listas/linuxisp-br/arquivo/2003/06/msg00025.h
tml

Well - on LCP phase - PPPd writes to syslog

wl1 pppd[11794]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5> <magic
0x453aa6f6>]

BUT!!! my tcpdump or tethereal don`t see such frame!! ((
Meantime - I see such LCP requests from pppoe client

# in syslog:
wl1 pppd[11794]: rcvd [LCP ConfReq id=0x0 <mru 1492> <magic 0x569641>]

# in tethereal - sniffer :
----------------------------------------------------------------------------
----------
Frame 7 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:32.934606000
Time delta from previous packet: 0.003523000 seconds
Time relative to first packet: 8.601848000 seconds
Frame Number: 7
Packet Length: 60 bytes
Capture Length: 60 bytes
Ethernet II
Destination: 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)
Source: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)
Type: PPPoE Session (0x8864)
PPP-over-Ethernet Session
Version: 1
Type: 1
Code: Session Data
Session ID: 0001
Payload Length: 16
Point-to-Point Protocol
Protocol: Link Control Protocol (0xc021)
PPP Link Control Protocol
Code: Configuration Request (0x01)
Identifier: 0x00
Length: 14
Options: (10 bytes)
Maximum Receive Unit: 1492
Magic number: 0x00337571
----------------------------------------------------------------------------
----------

Its not good news for me...
Maybe somebody listen about such sitiation?
Help!

thx2all

Bill Unruh

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Dec 25, 2003, 11:32:37 PM12/25/03

"Evgeny Boksha" <rik...@mail.ru> writes:

]hi2all

ppp is not ethernet. Only once ppp is actually up and running does it
act like ethernet. Ie, tcpdump is not the way the debug ppp setup.
Now if you tell us what your problem is then maybe we could help.

Evgeny Boksha

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Dec 26, 2003, 3:52:22 AM12/26/03

> ppp is not ethernet. Only once ppp is actually up and running does it
> act like ethernet. Ie, tcpdump is not the way the debug ppp setup.
> Now if you tell us what your problem is then maybe we could help.

I see.
(Thank you for reply)

Problem...

OS <> pppd <> rp-pppoe plugin <> pppoe == media == pppoe-client

1. at first, as I understand - only pppoe frames negotiation (PADI, PADO,
PADR, PADS)
2. Then - LCP negotiation - and pppd generates LCP-Config Requests.
3. This LCP requests passed via rp-pppoe plugin to pppoe
And there, I think, I have problem.

When PPPD writes to syslog

wl1 pppd[11794]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5>
<magic 0x453aa6f6>]

- tcpdump (or ethereal) Dont see such frame!

And when I tests pppoe on WinXP and when pppoe session successful
(Server - is hardware router AT-AR410) - I see frames with LCP-Conf Requests
on client side (with sniffer Ethereal)

Look to logs:

# syslog

wl1 pppoe-server[11794]: Session 1 created for client 00:30:84:a6:13:c5
(10.0.0.2) on eth1
wl1 pppd[11794]: Plugin rp-pppoe.so loaded.
wl1 pppd[11794]: RP-PPPoE plugin version 3.3 compiled against pppd 2.4.2b3
wl1 pppd[11794]: pppd 2.4.2b3 started by root, uid 0
wl1 pppd[11794]: using channel 78
wl1 pppd[11794]: Using interface ppp0
wl1 pppd[11794]: Connect: ppp0 <--> /dev/pts/0

# this frames really dont pass trough interface :

wl1 pppd[11794]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5> <magic
0x453aa6f6>]

wl1 last message repeated 3 times

wl1 pppd[11794]: rcvd [LCP ConfReq id=0x0 <mru 1492> <magic 0x569641>]

# this frame really dont pass trough interface :
wl1 pppd[11794]: sent [LCP ConfAck id=0x0 <mru 1492> <magic 0x569641>]

wl1 pppd[11794]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5> <magic
0x453aa6f6>]

wl1 last message repeated 3 times

wl1 pppd[11794]: rcvd [LCP ConfReq id=0x0 <mru 1492> <magic 0x569641>]

wl1 pppd[11794]: sent [LCP ConfAck id=0x0 <mru 1492> <magic 0x569641>]

wl1 pppd[11794]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5> <magic
0x453aa6f6>]
wl1 pppd[11794]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5> <magic
0x453aa6f6>]

wl1 pppoe-server[11792]: Sent PADT
wl1 pppd[11794]: Terminating on signal 15.
wl1 pppd[11794]: sent [LCP TermReq id=0x2 "User request"]

Sniffer log
#tethereal -V

#Client 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)
#Server 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)

=========
Frame 1 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:24.332758000
Time delta from previous packet: 0.000000000 seconds
Time relative to first packet: 0.000000000 seconds
Frame Number: 1

Session ID: 0009

Payload Length: 16
Point-to-Point Protocol
Protocol: Link Control Protocol (0xc021)
PPP Link Control Protocol
Code: Configuration Request (0x01)
Identifier: 0x00
Length: 14
Options: (10 bytes)
Maximum Receive Unit: 1492

Magic number: 0x0032f4a7

Frame 2 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:30.432779000
Time delta from previous packet: 6.100021000 seconds
Time relative to first packet: 6.100021000 seconds
Frame Number: 2

Packet Length: 60 bytes
Capture Length: 60 bytes
Ethernet II
Destination: 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)
Source: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)

Type: PPPoE Discovery (0x8863)
PPP-over-Ethernet Discovery
Version: 1
Type: 1
Code: Active Discovery Terminate (PADT)
Session ID: 0009
Payload Length: 0
PPPoE Tags

Frame 3 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:32.927034000
Time delta from previous packet: 2.494255000 seconds
Time relative to first packet: 8.594276000 seconds
Frame Number: 3

Packet Length: 60 bytes
Capture Length: 60 bytes
Ethernet II

Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)

Source: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)

Type: PPPoE Discovery (0x8863)
PPP-over-Ethernet Discovery
Version: 1
Type: 1
Code: Active Discovery Initiation (PADI)
Session ID: 0000
Payload Length: 12
PPPoE Tags
Tag: Host-Uniq
Binary Data: (4 bytes)
Tag: Service-Name

Frame 4 (63 on wire, 63 captured)
Arrival Time: Dec 25, 2003 15:35:32.927335000
Time delta from previous packet: 0.000301000 seconds
Time relative to first packet: 8.594577000 seconds
Frame Number: 4
Packet Length: 63 bytes
Capture Length: 63 bytes
Ethernet II
Destination: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)
Source: 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)
Type: PPPoE Discovery (0x8863)
PPP-over-Ethernet Discovery
Version: 1
Type: 1
Code: Active Discovery Offer (PADO)
Session ID: 0000
Payload Length: 43
PPPoE Tags
Tag: AC-Name
String Data: wl1
Tag: Service-Name
Tag: AC-Cookie
Binary Data: (20 bytes)
Tag: Host-Uniq
Binary Data: (4 bytes)

Frame 5 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:32.930656000
Time delta from previous packet: 0.003321000 seconds
Time relative to first packet: 8.597898000 seconds
Frame Number: 5

Packet Length: 60 bytes
Capture Length: 60 bytes
Ethernet II
Destination: 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)
Source: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)

Type: PPPoE Discovery (0x8863)
PPP-over-Ethernet Discovery
Version: 1
Type: 1
Code: Active Discovery Request (PADR)
Session ID: 0000
Payload Length: 36
PPPoE Tags
Tag: Service-Name
Tag: Host-Uniq
Binary Data: (4 bytes)
Tag: AC-Cookie
Binary Data: (20 bytes)

Frame 6 (32 on wire, 32 captured)
Arrival Time: Dec 25, 2003 15:35:32.931083000
Time delta from previous packet: 0.000427000 seconds
Time relative to first packet: 8.598325000 seconds
Frame Number: 6
Packet Length: 32 bytes
Capture Length: 32 bytes
Ethernet II
Destination: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)
Source: 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)
Type: PPPoE Discovery (0x8863)
PPP-over-Ethernet Discovery
Version: 1
Type: 1
Code: Active Discovery Session-confirmation (PADS)
Session ID: 0001
Payload Length: 12
PPPoE Tags
Tag: Service-Name
Tag: Host-Uniq
Binary Data: (4 bytes)

===== OK - first phase passed. Next - LCP . ==

# I see full information about client`s LCP requests
# but I dont see such frame from server on interface...

Frame 8 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:39.032480000
Time delta from previous packet: 6.097874000 seconds
Time relative to first packet: 14.699722000 seconds
Frame Number: 8

Packet Length: 60 bytes
Capture Length: 60 bytes
Ethernet II
Destination: 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)
Source: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)
Type: PPPoE Session (0x8864)
PPP-over-Ethernet Session
Version: 1
Type: 1
Code: Session Data
Session ID: 0001
Payload Length: 16
Point-to-Point Protocol
Protocol: Link Control Protocol (0xc021)
PPP Link Control Protocol
Code: Configuration Request (0x01)
Identifier: 0x00
Length: 14
Options: (10 bytes)
Maximum Receive Unit: 1492
Magic number: 0x00337571

Frame 9 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:45.132379000
Time delta from previous packet: 6.099899000 seconds
Time relative to first packet: 20.799621000 seconds
Frame Number: 9

Frame 10 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:51.232259000
Time delta from previous packet: 6.099880000 seconds
Time relative to first packet: 26.899501000 seconds
Frame Number: 10

Frame 11 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:35:57.332079000
Time delta from previous packet: 6.099820000 seconds
Time relative to first packet: 32.999321000 seconds
Frame Number: 11

# ==== Clent by timeout drop session =========================

Frame 12 (60 on wire, 60 captured)
Arrival Time: Dec 25, 2003 15:36:03.432117000
Time delta from previous packet: 6.100038000 seconds
Time relative to first packet: 39.099359000 seconds
Frame Number: 12

Packet Length: 60 bytes
Capture Length: 60 bytes
Ethernet II
Destination: 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)
Source: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)

Type: PPPoE Discovery (0x8863)
PPP-over-Ethernet Discovery
Version: 1
Type: 1
Code: Active Discovery Terminate (PADT)
Session ID: 0001
Payload Length: 0
PPPoE Tags

Frame 13 (37 on wire, 37 captured)
Arrival Time: Dec 25, 2003 15:36:03.432423000
Time delta from previous packet: 0.000306000 seconds
Time relative to first packet: 39.099665000 seconds
Frame Number: 13
Packet Length: 37 bytes
Capture Length: 37 bytes
Ethernet II
Destination: 00:30:84:a6:13:c5 (ALLIED_a6:13:c5)
Source: 00:50:fc:cd:7c:61 (EDIMAX_cd:7c:61)
Type: PPPoE Discovery (0x8863)
PPP-over-Ethernet Discovery
Version: 1
Type: 1
Code: Active Discovery Terminate (PADT)
Session ID: 0001
Payload Length: 17
PPPoE Tags
Tag: Generic-Error
String Data: Received PADT

=======================================================

LINUX 2.4.21
pppd 2.4.2b3
rp-pppoe 3.3

Network Scheme :
LINUX --DWL1700 <802.11.b> DWL810+ --AT-AR220E with NAT(pppoeclient)-LAN

Thank you

Clifford Kite

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Dec 26, 2003, 12:49:12 PM12/26/03

Evgeny Boksha <rik...@mail.ru> wrote:
> hi2all
> I have problem with setting up pppoe-server.

> On this page I get instruction for setting
> http://listas.conectiva.com.br/listas/linuxisp-br/arquivo/2003/06/msg00025.h
> tml

Exactly following this may not be the correct thing to do. In any case,
the source for pppd version 2.4.2b3 is available at ftp.samba.org in
/pub/ppp, and it includes the source for a rp-pppoe PPPoE plugin. It
may be more compatible with that pppd than one from the RP site.

If you change to the pppd/plugins directory and do "make" that should
compile a PPPoE plugin compatible with the later 2.4.x series kernels
where much of PPPoE is now a part of the kernel. The Makefile line
# SUBDIRS += radius
may have to be uncommented for a server setup.

> Well - on LCP phase - PPPd writes to syslog

> wl1 pppd[11794]: sent [LCP ConfReq id=0x1 <mru 1492> <auth chap MD5> <magic
> 0x453aa6f6>]

> BUT!!! my tcpdump or tethereal don`t see such frame!! ((
> Meantime - I see such LCP requests from pppoe client

Yes, from the sniffer output it looked like that that no PPPoE
frame that was sent appeared on the interface. I've not done PPPoE
(thankfully), so the suggestion above is the only one that comes
to mind.

> thx2all

--
Clifford Kite Email: "echo xvgr_yv...@ri1.arg|rot13"
PPP-Q&A links, downloads: http://ckite.no-ip.net/
/* My confidence in this answer (X), on a scale of 0 to 10:
|----|----|----|----|----|----|----|----|----|----|
0----1----2----3----4----5----6----7----8----9----10 */

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