LayerView: Application Preferences.
LayerView's Application Preferences dialog allows you to change various global program
settings. To access it, open the
Tools menu and select
Preferences....
The options available are:
- Perform name lookups: This affects how addresses are displayed throughout
the program. Allowing LayerView to perform name lookups will convert IP addresses into
their associated host names, however note that a DNS lookup is required to do this
(hence it may show up on your packet trace). Note that LayerView will throttle its name
lookups to prevent itself from using too much bandwidth.
If you opt to perform name lookups, you can select how addresses will appear in the Low
Level and Conversations views using the drop-down lists below.
- Use promiscuous mode packet sniffing: When selected, LayerView will collect
every packet that it can see, not just packets which are directed to the network card
it is monitoring. This means that you can monitor data sent/received by other users on
the network. Note that this is usually only supported by wired connections.
For LayerView to be able to receive other users' packets, the network card needs to
have access to every packet. If you are on a hubbed network then this is always the
case since every packet is sent down every port in the hub. If you are on a switched
network, then packets are usually only sent to the port with the correct address,
ensuring that only the intended recipient gets the data required. Therefore your
network card only has access to packets which are bound to the local system. However,
some network switches have a mirror or monitor port which is specifically
designed for this purpose: all packets on the network are re-broadcast through that
port, allowing LayerView full access to all users' network traffic.
Most wireless networks do not support promiscuous mode packet sniffing. If you
get no results at all then your netowork card probably doesn't support promiscuous
mode.
- Read packet buffer: Controls how much data is read from the low-level driver
each time. Usually you should not change this, but if you are on a particularly
high-traffic network then you may notice a performance boost if you increase the buffer
to 1000 Kb.
- Reset dialogs: Resets the saved response to each dialog where "do not ask me
this again" has been checked.