[pptp-server] Redhat installation clarification question

[Chris Williams]

I'm stuck at the "Setup your chap-secrets file." step.  The file contains
two commented lines:
# Secrets for authentication using CHAP
# client        server  secret                  IP addresses
What do I put here?  I am thinking:
client: account name (like jondoe),
server: ??  I don't know what goes there
secret: jondoe's password (plaintext??)
ip addresses: ??  I don't know

Thanks,
Chris Williams