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EHNT(1) FreeBSD General Commands Manual EHNT(1)

ehnt
Extreme Happy Netflow Tool. Client part

ehnt [-0 ASN] [-a ASN] [-b] [-c count] [-i mins] [-m mode] [-n intidx] [-p port] [-P proto] [-r addr] [-s server:port] [-x prefix]

The ehnt command starts ehnt(1) client which connects to ehntserv(8) server and converts raw flow of NetFlow version 5 packets into human-readable (or machine-readable) form.

Ehnt currently has two basic modes of operation, dump and top. The dump modes are used to output details about individual flows. Top mode is used to generate reports which display averages over time for AS numbers, IP protocols and TCP/UDP ports.

The options are as follows:

ASN
Replace AS number 0 occurences with this AS number
ASN
Only display flows to/from this AS number
Display big flows (only shows flows with the most bytes or packets received so far)
count
Exit after <count> flows are received
Display command-line help
mins
How long to wait between report generations (in minutes)
mode
The name of the mode of operation to use: dump displays flow detail; shortdump shows flow details in a more compact fashion; colondump shows flow details in a machine-readable format; top generates reports of top average utilization
intidx
Specify the interface by SNMP ifIndex number
port
Only display flows to/from this tcp or udp port number
proto
Only display flows using this IP protocol number
addr
Only display flows reported by this router IP address
server:port
The hostname or IP address and port number of the ehntserv(8)
topmode
The type of report to generate when in top mode. (The report type can also be changed interactively while the program is running.) as; Display the AS report proto; Display the IP protocol report tcpport; Display the TCP port report udpport; Display the UDP port report
Display the ehnt version number.
prefix
Only display flows to/from this IP prefix. The format for <prefix> is 'address/length', for example 1.2.3.4/30 or 127.0.0.0/8.

/usr/local/etc/asnc.txt
Autonomous Systems Number-to-Name Convertion config

ehntserv(8)

Nik Weidenbacher ⟨nikw@martnet.com⟩
Dmitry Morozovsky ⟨marck@rinet.ru⟩

September 4, 2001

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