Re: scanning for network printers?
Re: scanning for network printers?
- Subject: Re: scanning for network printers?
- From: "Peter Sichel" <email@hidden>
- Date: Tue, 19 Jul 2005 09:57:52 -0400
On 7/16/05, Mike Cohen wrote:
>If the printers respond to ping requests, you can try sending an ICMP
>ping to the broadcast address (usually x.x.x.255) to see which IP
>addresses actually have some device so you don't have to try all 253
>addresses.
The Address Scan tool in IPNetMonintorX will ping all the IP addresses
within a 255 address subnet within a few seconds. When you get
a ping response, you can get the Ethernet hardware address using ARP
and then lookup the Organization Unique Identifier from the first
3 octets of the hardware address to determine the device manufacturer.
If you have some idea who does or does not make the printer, this
will narrow the field pretty quickly.
For example, my printer is made by HP. The Address Scan tool will
find it in a couple seconds without using Bonjour. If you know what
port the printer listens on, you can also use the Port Scan tool.
It uses select() to connect with timeout and tries to open 20
connections per timeout. Once again you can scan a modest LAN
within a few seconds. You can experiment to see how this all
works by downloading a free trial of IPNetMonitorX from my website.
Kind Regards,
- Peter Sichel
Sustainable Softworks
<http://www.sustworks.com>
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