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1 vote
1 answer
10k views

How do I clear ARP cache in macOS Catalina (10.15.7)?

I am trying to clear ARP cache on my mac. arp -a : displays all the addresses ip -s -s neigh flush all gives me Option "-s" is unknown, try "ip -help" in macOS Catalina (10.15.7). ...
rshah's user avatar
  • 111
1 vote
2 answers
88 views

OSX - Find if phone is connected to the WIFI Network

I'm trying to programmatically find whether my phone is connected to the current Network, given that I know my device's mac Address. Something like this SOMETIMES works: arp -a | grep "11:11:11:11:...
bamboo_inside's user avatar
1 vote
1 answer
231 views

receiving a bunch of (incomplete)s during a GREP and AWK command

when I use this command: arp -a | grep "192.168.0.19" | awk '{ print $4 }' I receive these results... the ff:ff mac address is what I want, but why do I get a field of (incomplete)s? All I want is ...
James Dean's user avatar
2 votes
3 answers
17k views

How to manually send an ARP request

I recently sniffed with Tcpdump a packet "ARP, Request who-has 192.168.2.3 tell 192.168.2.2, length 28". I would like to reproduce this message, and to send an ARP request from my laptop to any IP I ...
phenetas's user avatar
  • 161
2 votes
3 answers
7k views

Is there a way to get “arp” to list devices on all subnets of a network?

I'm using arp -an on Mac OS X to list all devices on my network, but (as I understand it) this just lists devices on the same subnet. Is it possible to list all devices on the network and not just my ...
JeffThompson's user avatar
0 votes
1 answer
2k views

Why would an arp table be incomplete?

Last night I connected to a local BT Fon network that my housemate was already on. My aim was to find his mac address, so I did an arp -a command (from OS X) and it returned only the router address. ...
Carl Wright's user avatar
0 votes
1 answer
1k views

Why is ARP in Mac going crazy? How to disable it?

This is the first time I am observing the ARP request from my Mac is going crazy. It keeps sending the ARP request for last an hour. The requests are like following (using wireshark) 484975 2972....
Morison's user avatar
  • 121