rencontre de belle femme Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count. Would you like to answer one of these unanswered questions instead? Ubuntu Community Ask! Home Questions Tags Users Unanswered. Peter Mortensen 1, 2 10 Maythux Maythux Why do you place!
It is not necessary and only used in cases where the question is shouted or of high importance. Try just: How to find a network ID and subnet mask Use command ip a: Or as man nmap says: This will need to be adjusted so that I don't know if that is the reason, but on Linux I use nmap -sP Do you know why root priveleges are required to read MAC addressees from the network? Edit Per davidcl's comment, this answer isn't as perfect as I'd first hoped. Just to play through the arguments quickly But what about hackers in my network?!
They can block all responses to every type of scan.
Oh but surely nmap is still best possible solution When run here, it's still missing out four devices. Four devices that are active on the network. Either they're not responding to the pings or nmap isn't waiting long enough for them to respond I don't know. And don't call me Shirley. Maythux For all network users its origin is generally unknown, so no, it can't. Ruslan That's just paranoid me blanking them out I'm sure it would be fairly hard for an individual to do anything with them but you never know who's stalking you.
I'm surprised by this answer. If there has been no communication between the local machine and another machine on the network recently, that machine will not show up in the "arp" listing. If the computer running arp hasn't received a packet from another device, it won't be on the arp list.
I'd be interested in knowing more about the devices that nmap failed to detect on your network; there are ways to hide from nmap but I've found the default nmap scan pretty effective. That said, There's no failsafe answer because if a device isn't generating traffic and isn't answering requests, it is invisible-- but most devices will answer some type of request. I use arp-scan for this: Eric Carvalho Yes, arp-scan is indeed the "best tool for the job". This isn't working for me You can use arp-scan.
Install using this command: This isn't finding a device that doesn't have an ip yet GUI You can try avahi-discover. Install it with this command or by clicking the above link: You should see a window with a list of devices on your local network. The MAC address will be the string in the square brackets.
Command line You can use this command in a terminal: Does this work to show the MAC address of a machine that is not running any services of any kind? In my case this doesn't work for every device on the network. Pseudo-code ahead: David Edwards 4, 3 25 The man pages don't seem too much help, or maybe I missed it. Thanks for the help so far I'm getting there EDIT: Just to share with the community Here's what I have in my script and it works If anyone sees any major issues, please let me know.
Thanks to all who helped me accomplish this task. Thanks for feeding back. I might have done this: Basically that means with this method it won't show up. So this doesn't really work if you are not on the same piece of ethernet. When I had to find machines all over the network, I wrote script that would dump the contents of the manageable switches show mac, the routers show arp and coordinate the details.
There are of course tons of third party tools that do that as well. I thought about mentioning this as well, but assumed he knew that non-local addresses will always show up as the DG MAC address. In that case, you have a different fish to fry, but his OP seems pretty clear on being a local static v. DHCP conundrum. Good call, though.
You're right, I thought about this. However, my testing environment is all behind the router and therefore all devices will have a subnet of 20 after switching to DHCP addressing. I used your fping -c 1 -g I should have thought of this before Thanks. However, I do have one problem with the grep command. No biggie, but just another little annoyance Oh, and yes there is much more to my script in terms of getting the MAC address, subnet and other input values, so I don't actually hard code the MAC.
Thanks again for the input.
Oh man am I going crazy This bit of code is the problem: Unknown host' If I run the command 'arp -n grep 0: Anyone with an idea? Where child. Good luck. Frennzy, True I did find the problem though and here is the solution for completeness: I'm done now You could turn off the case sensitivity by using grep -i.
Die fast. Pennsylvania, you know, the state with Pittsburgh, Philly, and Alabama in between.
Ars Legatus Legionis et Subscriptor. Jump to: Mako22 Ars Scholae Palatinae Registered: Apr 13, Posts: Tue Oct 10, 1: Frennzy "Live young. May 16, Posts: Tue Oct 10, 2: Tue Oct 10, 3: Fint Ars Scholae Palatinae Registered:
Nmap Or, you could write your own shell script to sweep a given subnet with pings, shouldn't be that difficult. If you need to reset your password, click here. Oh, and yes there is much more to my script in terms of getting the MAC address, subnet and other input values, so I don't actually hard code the MAC. Post as a guest Name. I want to use my own Ubuntu computer to do this and not have to hunt down and borrow a Windows computer every time.