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Full Discussion: Ethereal
Special Forums IP Networking Ethereal Post 18829 by Neo on Wednesday 3rd of April 2002 01:09:36 PM
Old 04-03-2002
If your network has controlled IP addresses and MAC addresses you can determine if a new device that is not authorized is on the network. This might help if you know that authorized users are not sniffing.... (based on trust and/or policy)... that depends on the size of your network under administration.

As PxT says, there is no way to know if a device is running a sniffer, except by looking at the device and seeing what software is installed and what processes are being executed.

Segmenting your traffic on a switch, as you suggest, helps, but if your device talks to devices outside the segment or across the switch, then the problem still exists... for example, when you talk to 'me' from your place, then people will be able to sniff from many points across the Internet.

If you need confidentiality, then I recommend you look at different cryptographic systems such as SSH, OpenSSH, SSLeay, PHP and a host of other cryptographic systems available to insure your traffic invisible to sniffers.
 

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IP-TOKEN(8)							       Linux							       IP-TOKEN(8)

NAME
ip-token - tokenized interface identifier support SYNOPSIS
ip token { COMMAND | help } ip token set TOKEN dev DEV ip token del dev DEV ip token get [ dev DEV ] ip token [ list ] DESCRIPTION
IPv6 tokenized interface identifier support is used for assigning well-known host-part addresses to nodes whilst still obtaining a global network prefix from Router advertisements. The primary target for tokenized identifiers are server platforms where addresses are usually manually configured, rather than using DHCPv6 or SLAAC. By using tokenized identifiers, hosts can still determine their network prefix by use of SLAAC, but more readily be automatically renumbered should their network prefix change [1]. Tokenized IPv6 Identifiers are described in the draft [1]: <draft-chown-6man-tokenised-ipv6-identifiers-02>. ip token set - set an interface token set the interface token to the kernel. TOKEN the interface identifier token address. dev DEV the networking interface. ip token del - delete an interface token delete the interface token from the kernel. dev DEV the networking interface. ip token get - get the interface token from the kernel show a tokenized interface identifier of a particular networking device. Arguments: coincide with the arguments of ip token set but the TOKEN must be left out. ip token list - list all interface tokens list all tokenized interface identifiers for the networking interfaces from the kernel. SEE ALSO
ip(8) AUTHOR
Manpage by Daniel Borkmann iproute2 28 Mar 2013 IP-TOKEN(8)
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