Timing Folder Page
The timing page lets you choose timing options. The following picture shows a screenshot
of the timing page:

Throttle Options
The following throttle options can be selected:
- Paranoid: scans very slowly in the hopes of avoiding detec
tion by IDS systems. It serializes all scans (no
parallel scanning) and generally waits at least 5
minutes between sending packets.
- Sneaky: is similar, except it only waits 15 seconds between sending packets.
- Polite: is meant to ease load on the
network and reduce the chances of crashing
machines. It serializes the probes and waits at
least 0.4 seconds between them.
- Normal: is the
default Nmap behaviour, which tries to run as
quickly as possible without overloading the network
or missing hosts/ports.
- Agressive: mode adds a 5
minute timeout per host and it never waits more
than 1.25 seconds for probe responses.
- Insane: is
only suitable for very fast networks or where you
don't mind losing some information. It times out
hosts in 75 seconds and only waits 0.3 seconds for
individual probes. It does allow for very quick
network sweeps though.
These canned timing modes should NOT be used in
combination with the lower level controls given
below. Per default nmapwin will use Normal.
Timeout Options
- --host_timeout Specifies the amount of time in milliseconds Nmap is allowed to
spend scanning a single host before giving up on
that IP. The default timing mode has no host time
out.
- --max_rtt_timeout
Specifies the maximum amount of time in millseconds Nmap is
allowed to wait for a probe response before
retransmitting or timing out that particular probe.
The default mode sets this to about 9000.
- --min_rtt_timeout
When the target hosts start to establish a pattern
of responding very quickly, Nmap will shrink the
amount of time in milliseconds given per probe. This speeds up the
scan, but can lead to missed packets when a
response takes longer than usual. With this param
eter you can guarantee that Nmap will wait at least
the given amount of time before giving up on a
probe.
- --initial_rtt_timeout Specifies the initial probe timeout in millseconds. This is gen
erally only useful when scanning firwalled hosts
with -P0. Normally Nmap can obtain good RTT esti
mates from the ping and the first few probes. The
default mode uses 6000.
- --max_parallelism Specifies the maximum number of scans Nmap is
allowed to perform in parallel. Setting this to
one means Nmap will never try to scan more than 1
port at a time. It also effects other parallel
scans such as ping sweep, RPC scan, etc.
- --scan_delay Specifies the minimum amount of time in milliseconds Nmap must wait
between probes. This is mostly useful to reduce
network load or to slow the scan way down to sneak
under IDS thresholds.
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