Useful tools include ethereal
which is a graphical
interface to the same output you might get from tcpdump. A
typical usage of tcpdump is:
The -l will ensure each newly generated line will be output
immediately (rather than cached). The -i identifies the
interface to monitor.
package provides terminal top-like view of
network connections. This is useful to provide an instantaneous
summary of network conenctions. The -F option will expand
hostnames, rather than listing just the first part of a hostname
(without the domain name).
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