Security issue regarding packet sizes!

[mclaughlincd]

Hi,

I am doing a thesis on comparing security on LAN's, WAN's, Internet etc. I was just wondering could anybody tell me whether or not say an Ethernet packet for example would increase in bytes by a severe % if security was added to it. How much more % bandwidth would it utilise?

Thanks

 

[ackka]

The % of bandwith increase is relative to what security measures you use. using IPV6 or say SSH can increase network traffic a great deal. Ethernet should not be a major increase because of the large packet size available. You see huge bandwith increases using SSH and a modem for example. The bandwith increase is also relative to the configuration. If you run a SSH client, for example on a linux system, you can directely interface with the TCP/IP stack, specify the SSH packet size using ip4 or ip6. On a windows environment you cannot do this (well not in most commercial apps).

You might be able to find more info under Data Transmission->Ethernet concerning bandwidth speeds.........

good luck

ackka
ackka@mad.scientist.com

http://home.cyberarmy.com/ackka/

 

[chiph]

I don't think you'd see a huge increase in the size of the packets. But you'd definately see an increase in the number of packets, as the caller gets authenticated, etc. Plus, I feel that the overhead of encryption would simply be spread among more packets as the IP protocol attempts to negotiate the largest packet size during session setup.

Chip H.