PPP over crypto pros


Single TCP connection is very easy to tunnel though firewalls
Can run on any port, if desired.
Supports all protocols supported by PPP
IPv4, IPv6, IPX (can disable protocols if desired)
SSH Authentication
OpenSSH supports many client authentication methods.
OpenSSH host key authentication can be performed once at runtime
SSL Authentication
Stunnel supports standardized X.509 certificates, CAs, cert chains.