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arnel1257

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is it possible to use VPN without routers?

is it possible to use vpn to connect two networks without the use of routers? if so what IP address should i use for the VPN client to Connect to the VPN server?

i have two LANs, one in the office and one in my boss's house. both uses DSL connections to access internet.

in the office, one pc is connected with DSL modem (having an IP address of 192.168.0.1) and we are using that as a proxy server to provide internet access to other computers in the network.

at my boss's house, all computers are connected via wireless LAN. they all connect to internet thru the access point.

how do i apply the VPN with this kind of set up without the need of buying a router?

ARNEL
 
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Avatar of Steve McCarthy, MCSE, MCSA, MCP x8, Network+, i-Net+, A+, CIWA, CCNA, FDLE FCIC, HIPAA Security Officer
Steve McCarthy, MCSE, MCSA, MCP x8, Network+, i-Net+, A+, CIWA, CCNA, FDLE FCIC, HIPAA Security Officer
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arnel1257

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the public IP address of my office DSL modem... is this the one that the ISP provided? where can i check this IP address. is this the same as the ip address in the DSN server addresses in the machine with DSL accounts?

so 192.168.0.1 is not the ip address i should configure my client vpn to connect to.

how do i forwart TCP port 1723 to the IP address of the machine?

sorry if i have so many questions, im very new to this.... just let me know if i need to increase points.. thank you.




what kind of modem is your office dsl modem?  
CISCO SOHO..
ok, good, do you know what model number?
sOHO 77 ...
ok, so you can telnet into it, and it has access list features, good.  can you telnet into it, get your config, and post it here.
the public IP address of my office DSL modem... is this the one that the ISP provided?

Yes....  This is the IP you want to use.  Usually you can logon and find the settings your ISP is providing.  There is also a shareware program called mywanip which will also tell you.

You will not use the 192.168 address as this is a private address and not routable on the Internet

hi!

i got my internet ip address using mywanip.. and i configure my client vpn pc to connect to that ip.. but all i got is an error message.. "There was no answer"...

what do you think is the problem?

arnel
You have to go into that dsl modem and forward TCP port 1723 to the 192.168 address of the machine you will be using as the endpoint.  Sometimes they will call it a VPN passthrough, sometimes port forwarding, etc.
how do i forward in the DSL MODEM the TCP port 1723 to the IP address of the VPN server machine?

is there a software that can do that? is it available in the net?
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wirthr,

sorry, but i dont know how to telnet into the router.. can you help me? is it easy? do i need to inform my internet provider..
it is easy, no you dont need to inform the internet provider.  do you know what the internal ip address of the router is?  you mentioned 192.168.0.1, is that the pc, or the soho 77?
also, as I understood from your original post, at the office, you have a single pc, which acts as a proxy server to provide internet access to the other pc's in the office.  why do you need a proxy?  The soho 77 with nat could provide internet access to the entire office, whithout the use of the proxy.
we need a proxy to limit some users  in accessing unauthorized web site.

but my pc doesnt go through the proxy... im accessing directly

i think i got the internet ip address of our dsl modem ... when i went to the mywanip.com site and from there i got my own internet ip address..

the one i have mentioned 192.168.0.1 is our proxy server, yes its a pc.

supposing i already got my internet ip address or the public ip address.. how do i go to the configure mode and so that i can type this parameter..

"ip nat inside source static (local ip of vpn server) (public internet interface) 1723?"





so do you know the internal ip address of the router?  What do you have set as your gateway on your pc?
according to mywanip.com

my internet ip address is ...62.215.205.125

but i dont know if that is the internal ip address of the router..

my Internet provider set my gateway on my pc as.. 192.168.0.254

The 62 address is the Public or External ip address of the router.  If your gateway is 192.168.0.254, then it's a good bet that it is the Internal IP address of your router.
ok.. so i have my external ip address and internal ip address..

how will i telnet it into my modem and how can i go to configure mode... so that i can type the
"ip nat inside source static (local ip of vpn server) (public internet interface) 1723?"
oh no...it is asking for a password.

i guess i have to contact my ISP then.

Yes....  You can always take a guess or look at the router, see the model, go to the web and see if they have some docs.  Those will usually tell the default password.