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Make sure you are choosing the same authentication that is set up on the router ie; wpa2, wpa, wep and so on and them make sure you are exactly emulating or duplicating the password and authentication protocal that is set up on the router. Hope this helps.
There are several reasons that this could be happening. Sometimes the DSL modem can be the cause. If it is configured incorrectly then it will not be setup to work in a routed bridge mode (what you need for it to work with the router). Easy fix for this: press the "reset" button in the back or bottom to set the modem to default settings then power cycle everything. Second, on your computer go to network and sharing center and find your adapter settings. right click on your Ethernet or wireless adapter (whichever you use to connect) and go to properties. Go to the TCP/IP protocal properties and check that everything is set to obtain its data automatically. Last thing to double check: Call your ISP and just verify the ip, login info, and DNS info are all correct. I have had an ISP give me the wrong DNS info before on accident and after several hours of troublshooting I called back and a different guy answered and told me that my DNS was wrong. I changed one number and POOF! Fixed! You can find more help for this at www.attivia.com or email us at firstname.lastname@example.org.
Peer to peer tunneling protocal is what pptp is if its connecting a limited connectivity that means some of the ports are stull being blocked thus needing for you to use your machine in a demilierized zone so this will open all avilable ports to your VPN software. Also keep in mind not all ISP's will support PPTP so you may have to use a softvpn software. Thanks i hope this helps
First the IGRP is a Cisco protocol. And there is not a magic solution. Here some Info: The Routing Problem
IGRP is intended for use in gateways connecting several networks. We
assume that the networks use packet-based technology. In effect the
gateways act as packet switches. When a system connected to one network
wants to send a packet to a system on a different network, it addresses
the packet to a gateway. If the destination is on one of the networks
connected to the gateway, the gateway will forward the packet to the
destination. If the destination is more distant, the gateway will
forward the packet to another gateway that is closer to the
destination. Gateways use routing tables to help them decide what to do
with packets. Here is a simple example routing table. (Addresses used
in the examples are IP addresses taken from Rutgers University. Note
that the basic routing problem is similar for other protocols as well,
but this description will assume that IGRP is being used for routing
IP.) Figure 1
network gateway interface ------- ------- --------- 128.6.4 none ethernet 0 128.6.5 none ethernet 1 128.6.21 126.96.36.199 ethernet 0 128.121 188.8.131.52 ethernet 1 10 184.108.40.206 ethernet 1