# The security/onesixtyone port

## onesixtyone-0.3.2 – efficient SNMP scanner

## Description

    onesixtyone takes a different approach to SNMP scanning. It takes advantage
    of the fact that SNMP is a connectionless protocol and sends all SNMP
    requests as fast as it can. Then the scanner waits for responses to come
    back and logs them, in a fashion similar to Nmap ping sweeps. By default
    onesixtyone waits for 10 milliseconds between sending packets, which is
    adequate for 100MBs switched networks. The user can adjust this value
    via the -w command line option. If set to 0, the scanner will send packets
    as fast as the kernel would accept them, which may lead to packet drop.

    Running onesixtyone on a class B network (switched 100MBs with 1Gbs backbone)
    with -w 10 gives us a performance of 3 seconds per class C, with no dropped
    packets. All 65536 IP addresses were scanned in less than 13 minutes.

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Categories:
  security

## Library dependencies

## Build dependencies

## Run dependencies