Messages in this thread | | | Date | Mon, 8 Jun 1998 17:55:56 -0400 (EDT) | From | Trevor Johnson <> | Subject | Re: What are they? |
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Riley Williams wrote:
> I have to admit to wondering what some of these acronyms stand for, > and not having any details on it, so perhaps somebody could > elucidate...
> > http://bmrc.berkeley.edu/people/chaffee/linux_pptp.html > > In that one email, there are two acronyms which don't appear to make > sense, so perhaps somebody can decode them for me... > > Q> GRE = Grampian Railway Enthusiasts [Club] > Q> PPTP = Publicity, Promotions & Training Panel > > Presumably, those are the wrong meanings thereof...
Linux' Configure.help explains GRE:
IP: GRE tunnels over IP CONFIG_NET_IPGRE Tunneling means encapsulating data of one protocol type within another protocol and sending it over a channel that understands the encapsulating protocol. This particular tunneling driver implements GRE (Generic Routing Encapsulation) and at this time allows encapsulating of IPv4 or IPv6 over existing IPv4 infrastructure. This driver is useful if the other endpoint is a Cisco router: Cisco likes GRE much better than the other Linux tunneling driver ("IP: tunneling" above). In addition, GRE allows multicast redistribution through the tunnel.
IP: broadcast GRE over IP CONFIG_NET_IPGRE_BROADCAST One application of GRE/IP is to construct a broadcast WAN (Wide Area Network), which looks like a normal Ethernet LAN (Local Area Network), but can be distributed all over the Internet. If you want to do that, say Y here and to "IP: multicast routing" below.
The Web page mentioned above tells what PPTP stands for:
PPTP is the Point to Point Tunneling Protocol that is currently used by Windows 95/NT for creating Virtual Private Networks (VPNs). ___ Trevor Johnson
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