Re: what happens to a packet travelling from one network to another?
- From: "Mike Lowery" <selfspam@xxxxxxxxxxxxxxxx>
- Date: Mon, 9 Apr 2007 12:57:49 -0700
Yes, the packet header contains both destination and source information.
http://en.wikipedia.org/wiki/IPv4
"Gonzo" <no@xxxxxxxx> wrote in message
news:%23uPpxcceHHA.3956@xxxxxxxxxxxxxxxxxxxxxxx
So is it the header of the packet that contains the IP for the destination?
In the example is the word doc brocken down to packets?
"Bill Grant" <not.available@online> wrote in message
news:%233BlgHXeHHA.928@xxxxxxxxxxxxxxxxxxxxxxx
This document contains what you need to know.
http://www.microsoft.com/technet/network/vpn/vpnover.mspx
To summarize, the traffic between the client and the VPN server is normal
network traffic using Ethernet. When the VPN server detects that the packet
need to be delivered through the VPN tunnel to reach its destination it
encrypts the entire packet (including the private IP addresses) and adds a
new header. This header contains the public IP of the destination VPN server.
This packet is then sent through the Internet to the target VPN server. The
VPN server knows what traffic needs to go through the tunnel because it has a
route pointing to the VPN endpoint IP.
When the second VPN server receives the packet it strips off the outer
wrapper (because it has reached its detination). It then decrypts the payload
to recover the original private-addressed packet. It delivers this packet to
the workstation/server it is addressed to using normal Ethernet LAN delivery
methods.
The operation of the VPN tunnel is transparent to the LAN networking. The
LAN machines simply send the traffic across the LAN as it would to any other
router. The VPN router detects data which needs to be tunnelled.
"Gonzo" <nospam@xxxxxxxxx> wrote in message
news:e%23Bn0aSeHHA.4020@xxxxxxxxxxxxxxxxxxxxxxx
I had a question from a boss asking how a packet, or lets say a word file
travels from one network over a vpn to another?
I just said it has the destination IP etc and uses the routes on a routes
and our VPN device encypts the data etc, but he was unimpressed, he wanted a
deeper explanation, what should I of said? Can anyone help me explain this
down to the packet/header level, it would be great or a link to a webpage
which eplains this.
.
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