User guide

Chapter 4. Configuring Special Features 113
PPP remote configuration
PPP remote-specific questions:
1. What is the home routerÕs name for PPP authentication?
2. What is the home routerÕs secret for PPP authentication?
3. Does the home router need PPP authentication for the remote router (company router)?
If yes:
a. What is the remote routerÕs name for PPP authentication?
b. What is the remote routerÕs secret for PPP authentication?
If no:
a. Use the command remote disauthen <remoteName> where <remoteName> is the name used to
refer to the companyÕs router.
4. Does the remote router dynamically assign an IP address for this PPP session?
If yes:
Use IP address translation (NAT)
If no and the home router is to behave as a LAN at home:
Which IP address and network mask does the home router use for its LAN at home? Use the eth ip
addr command to set the LAN at home. Do not enable IP address translation (NAT) for the remote
(company) router.
If no and the home router is to behave as a host at home:
Which IP address does it use at home? Assuming an IP address of www.xxx.yyy.zzz, use the
command:
remote setsrcipaddr www.xxx.yyy.zzz 255.255.255.255 <remoteName>
remote setiptranslate on <remoteName>
5. Which IP and network addresses does the home router access at work through this PPP session?
PPP remote answers. For our example, let us assume the answers to the above PPP remote-specific
questions are as follows:
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: