Specifications

Chapter 5. Configuring Software Options 129
1. ppp_soho
2. ppp_soho_secret
3. We assume that this router will authenticate the router at work with the following information:
a) the company routerÕs name is: ppp_work
b) the company routerÕs PPP secret is: ppp_work_secret
4. We assume that the companyÕs router will dynamically assign an IP address to the home router.
5. 172.16.0.0/255.240.0.0
PPP remote configuration commands. For our example, these commands would be used to set up the
PPP remote information for tunneling to work:
remote add ppp_work
remote setlns Work_Router ppp_work
remote setpasswd ppp_work_secret ppp_work
remote setiptranslate on ppp_work
remote addiproute 172.16.0.0 255.240.0.0 1 ppp_work
l2tp set oursysname ppp_soho Work_Router
l2tp set ourpassword ppp_soho_secret Work_Router
Complete LNS and L2TP Client Configuration Example
The following information and illustration (Figure 1) provide a configuration example of an LNS and L2TP
Client.
¥ Assumptions
IP Addresses
The LNS serverÕs LAN IP address is 192.168.100.1 (LNSserver) with a mask of 255.255.255.0.
The LNS has a WAN IP address of 192.168.110.1, which is used as the tunnel endpoint.
The LNS connects to the remote internet.
The L2TP ClientÕs LAN IP address is 192.168.101.1 (soho) with a mask of 255.255.255.0. Additionally,
192.168.101.1 is also the tunnel endpoint within the L2TP client. The router soho connects to the remote
isp.
Secret/password
A shared tunnel secret of ÒtunnelsecretÓ will be used.
PPP Authentication
The LNS will authenticate the client using PPP. The client will not try to authenticate the LNS using
PPP. For PPP authentication, the L2TP client will be known as ÒlacclientÓ with a password of
ÒclientpasswordÓ.