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178 AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers
RouterOS v3 Configuration and User Guide
8.6.8 Troubleshooting
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.
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 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 RouterOS 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
8.7 PPTP
Document revisi on: 1.4 (Tue Aug 09 12:01:2 1 GMT 200 5)
Applies to: V2.9
8.7.1 General Information
Summary
PPTP (Point to Point Tunnel Protocol) supports encrypted tunnels over IP. The RouterOS
implementation includes support for PPTP client and server.
General applications of PPTP tunnels:
secure router-to-router tunnels over the Internet
linking (bridging) local Intranets or LANs
accessing an Intranet/LAN of a company for remote (mobile) clients (employees)
Each PPTP connection is composed of a server and a client. The RouterOS may function as a server or
client - or, for various configurations, it may be the server for some connections and client for other
connections. For example, the client created below could connect to a Windows 2000 server, another
RouterOS Router, or another router which supports a PPTP server.