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h2: šta wikipedia kaže

PPPoE, Point-to-Point Protocol over Ethernet, is a network protocol for encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames. It is used mainly with ADSL services where individual users connect to the ADSL transceiver (modem) over Ethernet and in plain Metro Ethernet networks. It was developed by UUNET, Redback Networks, and RouterWare and is available as an informational RFC 2516.

Ethernet networks are packet-based and have no concept of a connection or circuit and also lack basic security features to protect against IP and MAC conflicts and rogue DHCP servers. By using PPPoE, users can virtually "dial" from one machine to another over an Ethernet network, establish a point to point connection between them and then securely transport data packets over the connection.

Although traditional PPP is a peer-to-peer protocol, PPPoE is inherently a client-server relationship since multiple hosts can connect to a service provider over a single physical connection.

The Discovery process consists of four steps between the host computer which acts as the client and the access concentrator at the internet service provider's end.

PADI stands for PPPoE Active Discovery Initiation.
PADO stands for PPPoE Active Discovery Offer.
PADR stands for PPPoE Active Discovery Request.
PADS stands for PPPoE Active Discovery Session-confirmation.
PADT stands for PPPoE Active Discovery Termination.

Since the point to point connection established has an MTU lower than that of standard Ethernet (typically 1492 vs Ethernet's 1500), it can sometimes cause problems when Path MTU discovery is defeated by poorly configured firewalls.

http://www.freeantennas.com/PPPoE-Server-HOWTO.html

http://www.netup.biz/article-pppoe-server.php

Jutros sam kod mame odmah podesio pppoe-server sa idejom da ulovim username/pwd bihneta

povezao sam mamin notebook sa svojim i digao ppoe server, i to je odmah proradilo, podesio u /etc/ppp/pppoe-server-options parametre

debug
show-password

i mogao sam vidjeti šta mi klijent govori.

Ali, kada sam istu stvar pokušao sa dir-100 nema nikakvog habera od njega.

uveče sam onda uzeo čitati o pppoe

root@nmraka-2:~# cat /etc/ppp/pppoe-server-options

auth
#default-mru
debug
ms-dns 10.10.220.1
proxyarp
show-password
default-asyncmap
lcp-echo-interval 60
lcp-echo-failure 5
noipdefault
noipx
nodefaultroute
noktune
netmask 255.255.255.0

root@nmraka-2:~# cat start_pppoe_server.sh

PROV=bihnet
MAX=5
BASE=10.10.220.2
PLA=10.10.220.0/8
MYIP=10.10.220.1
PPPOEOPT=/root/pppoe-server-options

echo $MYIP

echo "1" > "/proc/sys/net/ipv4/ip_forward" 
/usr/sbin/pppoe-server -F -T 60 -I eth0  -N $MAX -C $PROV -S $PROV -R $PLA   -L $MYIP

znači kada sam stavio da je "-C" provajder "bihhet" PPPoE servisa onda je klijent nastavio handshake sa serverom ...

bringout@nmraka-2:~$ sudo vi /etc/ppp/pap-secrets

...
#    *    password
"hsabina"  *  "test" * 10.10.220.2      
"hernad"   *  "kvak" * 10.10.220.3     

i tu sam došao do potrebnog info - uopšte se ne radio o hsabina bihnet accountu nego hsabina01