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Welcome to Netdiscover 0.3 beta. Netdiscover is a network address discovering tool, developed mainly for those wireless networks without dhcp server, it also works on hub/switched networks. Its based on arp packets, it will send arp requests and sniff for replys.
Its my first public C tool, so dont be too hard with me, if some parts on the code looks like offuscated or are unreadable, and feel free to mail me with suggestions or patches at firstname.lastname@example.org
Also mail me for any bug or compilation error, it must compile with gcc 2.95 or newer.
An excesive cpu comsuption happens on OpenBSD, due to threads design and the use of pcap_open_live() with pcap_loop(), any sugestions for fix are welcome.
$ sh update-oui-database.sh (optional) $ ./configure $ make
- k/j (or up/down arrow keys) scroll up/down - q quit
Usage: ./netdiscover [-i device] [-r range | -p] [-s time] [-n node] [-c count] [-f] [-S]
The network device to sniff at and inject packets. If no device was specified, first available will be used.
Scan a given range instead of auto scan. Valid range values are: 192.168.0.0/24, 192.168.0.0/16 or 192.168.0.0/8
Enable passive mode do not send anything, only sniff
It will sleep given time in milliseconds between each arp request injection. (default 1)
Number of times to send each arp reques. Usefull for networks with packet loss, so it will scan given times for each host.
Last ip octet used for scanning as source host, you can change it if the default host is already used (from 2 to 253) (default 66)
Enable sleep time supression betwen each request. I will sleep each 255 scanned hosts instead of do it by each one, this mode was used on 0.3 beta4 and older releases. Avoid this option on networks with packet lossing, or in wireless networks with low signal level. (also called hardcore mode)
Enable fastmode scan, it will only scan for hosts .1, .100, .254 on each network, usefull when searching for addresses being used, after find one you can make a specific range scan to see online boxes. Scanned hosts can be easily modified at fast_ips array on main.c source.
If -p or -r options are not used, netdiscover will automatically scan for common lan addresses. Those address lists can be modified at common_net on main.c
Scan common lan addresses on eth0
Fast scan common lan addresses on eth0 (search only for gateways)
Scan some fixed ranges
Scan common lan addresses with sleep time 0.5 instead of default 1
Scan fixed range on fast mode with sleep time 0.5 instead of default 1
Only sniff for arp traffic, dont send nothing
Scan for common lan addresses using old hardcore mode (much more faster, but avoid it on networks with bad link)
More parameter combinations are possible, these are only some examples.
Feel free to mail me with any problem, bug, suggestions or fixes at: Jaime Penalba email@example.com