MikroTik RouterOS v2.9 Reference Manual page 357

Description
• I can connect to my PPPoE server. The ping goes even through it, but I still cannot open
web pages
Make sure that you have specified a valid DNS server in the router (in /ip dns or in /ppp
profile the dns-server parameter).
• The PPPoE server shows more than one active user entry for one client, when the clients
disconnect, they are still shown and active
Set the keepalive-timeout parameter (in the PPPoE server configuration) to 10 if You want
clients to be considered logged off if they do not respond for 10 seconds.
Note that if the keepalive-timeout parameter is set to 0 and the only-one parameter (in PPP
profile settings) is set to yes then the clients might be able to connect only once. To resolve
this problem one-session-per-host parameter in PPPoE server configuration should be set to
yes
• I can get through the PPPoE link only small packets (eg. pings)
You need to change mss of all the packets passing through the PPPoE link to the value of
PPPoE link's MTU-40 at least on one of the peers. So for PPPoE link with MTU of 1480:
[admin@MT] interface pppoe-server server> set 0 max-mtu=1440 max-mru=1440
[admin@MT] interface pppoe-server server> print
Flags: X - disabled
0 service-name="mt" interface=wlan1 max-mtu=1440 max-mru=1440
authentication=pap,chap,mschap1,mschap2 keepalive-timeout=10
one-session-per-host=yes max-sessions=0 default-profile=default
[admin@MT] interface pppoe-server server>
• My windows PPPoE client obtains IP address and default gateway from the MikroTik
PPPoE server, but it cannot ping beyond the PPPoE server and use the Internet
PPPoE server is not bridging the clients. Configure masquerading for the PPPoE client
addresses, or make sure you have proper routing for the address space used by the clients, or
you enable Proxy-ARP on the Ethernet interface (See the IP Addresses and Address
Resolution Protocol (ARP) Manual)
• My Windows XP client cannot connect to the PPPoE server
You have to specify the "Service Name" in the properties of the XP PPPoE client. If the
service name is not set, or it does not match the service name of the MikroTik PPPoE server,
you get the "line is busy" errors, or the system shows "verifying password - unknown error"
• I want to have logs for PPPoE connection establishment
Configure the logging feature under the /system logging facility and enable the PPP type logs
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