ARP (Address Resolution Protocol) is a protocol used to find an address from the link layer (Ethernet, for example) from the network layer address (such as an IP address).

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ESX 6 and Linux 3.x arp fail in back 2 back link

we are having a strange problem with back 2 back connection between an ESX 6 and CentOS 7 machine. Hoping to find a solution on stackoverflow The story is below: - we are using a CentOS 7 directly ...
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Working around IP Conflicts with ARP meddling or custom TCP/IP stack

Slightly interesting conundrum, I have a network of 15-20 embedded devices that are effectively hard coded with the same static IP address, but they all have different MAC ID's. I need to address ...
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Finding IP Address from MAC of a device in a different subnet

I am new to networking as such, but I have been searching a lot about the problem of finding IP from MAC for the past couple of days. I have a device whose MAC address I know and I have an Android app ...
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34 views

Setting up static IP for virtualbox

I was learning arpspoofing.I was using my Ubuntu machine as the Man in the middle, an Ubuntu in my virtualbox as the target and my default gateway(Which is 10.7.1.2) as the target gateway. In order to ...
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Why does an IP on a dummy interface answer to an ARP request on eth0

I've brought up a dummy interface on my (Ubuntu 15.10) laptop with an ip address of 10.0.3.144, netmask 255.255.255.255 I have a USB -> Ethernet adaptor. When plugged in this is configured to ...
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IP packet forwarding from Kali VM to router

Versions: Host OS: Windows 10 Virtual box: 5.0.10 r104061 VM: Kali Linux 2.0.0 Victim machine: My laptop (I will add info about it if needed) Networking: Host IP: 192.168.1.6 VM IP: 192.168.1.12 ...
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Why is Linux machine sending ARP request for an IP on a different subnet?

We have a linux machine, on the 192.168.2.0/24 subnet sending arp requests when we try to connect to a machine on the 192.168.5.0/24 network. (The arp requests are for the machine at 192.168.5.10, not ...
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77 views

VMWare NAT not populating ARP with IP/MAC from VMWare host only?

I ran into a problem while penetration testing with Netdiscover on a virtual set up using VMPlayer, free version. The attack machine is on the VMWare NAT network interface, and the target machines ...
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why doesn't system do ARP request broadcast before sending an IP packet?

First, let me describe the problem briefly. I have two programs which send IP packets from a host(192.168.0.101) to another host(192.168.0.106). These two programs are written respectively with C and ...
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Using arp-scan in ubuntu and kali

I am currently using Ubuntu 15.04 and I have installed arp-scan with apt-get. If I run it I get a list of machines with their IP addresses, MAC addresses and about half of them say the make, others ...
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Multicast Entries in Arp Table

So, I recently ran the arp -a command on my primary windows machine and noticed that there were a ton of multicast class-d addresses listed in my arp table. I do not remember seeing so many ...
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43 views

Testing ARP poisoning in VBox NAT network

I wanted to test ARP poisoning in a VBox NAT Network environment. I currently have 2 VM in the NAT network: a Kali Linux VM (IP 10.0.2.15) and a victim Ubuntu VM (IP 10.0.2.4) The other victim is ...
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207 views

PC sends repeated ARP requests to Default Gateway

CONTEXT: My machine, for whatever reason, is flooding the network with ARP requests. A downstream switch sees this as malicious and cuts my connection. I've narrowed it down to one of the dozen or ...
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How to make server answer for who has ARP request not directed to its ip (answer also for different ip)

I have a computer with Fedora, a board running RTEMS and an adapter from ethernet to RS232-RS485. All of them are connected through an ethernet hub, I want to establish a connection between the board ...
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32 views

How to send ARP - Who has - request from mac

I have some network issue between my 2015 Macbook pro and my Virgin Media Superhub 2. If my theory is right, I would be able to solve it, by sending ARP requests to my router every few seconds. ( Now ...
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45 views

detecting the router's ip address using arp command

When I use the command arp -a I get the list of IPs in my network. the first IP address after the address of my own pc (that I run command) is the IP address of the router. I want to know is the ...
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Invalid ARP received from GS724Tv4 ProSafe 24-port Gigabit Ethernet Smart Switch

The switch is configured with four ports (ports 9 - 12) for VLAN 114. Port 24 is configured as a trunk port used for uplink to a router. VLAN Status 114 B5-K05 VLAN 114 Static g9 - g12, g23 - ...
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Why is ARP replaced by NDP in IPv6?

ARP was replaced by the NDP (Neighbour Discovery Protocol). But I don't know the exact reason for this. Are there any security issues in ARP? Why ARP is replaced by NDP? What are the advantages of ...
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36 views

transfer ARP on linux iptables with diffrent subnet

Firewall(linux) - with 2 interfaces: internal, external ; also used as GW Internal: 192.168.254.1/16 External: 10.0.254.1/16 external_client(linux) IP: 10.0.1.1/16 internal_client(linux) IP: ...
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98 views

Cannot delete entry from ARP cache

A picture's worth a thousand words: I'm running in an Administrator command prompt and trying to delete an invalid ARP entry. It fails with no error or explanation. Where do I go from here?
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135 views

Can we block ARP requests in wan router

Can we block ARP requests in wan router .I cannot send ARP requests to anyone I think my isp blocked it. I cant connect to other nodes in the lan. when I inspected flow of packets using wireshark. I ...
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126 views

Windows 8.1 cannot connect to one specific device on LAN

I just changed out an old Linksys WRT54GS wireless router for a TP-Link TL-WR841N wireless router. I immediately flashed the router to use DD-WRT. Everything went seamlessly except that my Windows ...
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389 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 ...
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29 views

Layer2/3 ISO - Explain how layer 3 works

I'm confused to how a local network communicates. To my current understanding, all the computers communicate by using mac addresses (to talk to the NIC). Does this mean if the computer knows the mac ...
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92 views

Prevent ARP spoofing in AP, “wl deauthenticate” command

I am in a situation where I cannot do MAC filtering in an AP and I need to block a user that is ARP spoofing the network. I am trying to use the command wl deauthenticate to kick the client. And I ...
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872 views

How to set up a static/persistent ARP entry with OpenWRT 14.07, Barrier Breaker?

The title say it all, but here is the long version: I am trying to setup a way for my home server to automatically turn on using WakeOnLan, when a client tries to access it. My idea is that the ...
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114 views

Trouble resolving hostnames with arp -a

I'm trying to lookup hostnames of computers on the same network as me. Sometimes when I use arp -a I get a question mark (?) for the hostname. I've tried using nslookup xx.xx.xx.xx and host ...
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392 views

What causes dropping of ARP response packets in a wireless network?

I have a network of wireless access points (APs) in my local area network (LAN). Some PCs in the network can get ping responses from some other PCs/devices in the network but not some others. I have ...
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97 views

sniffing network traffic using arp spoofing

I am experimenting with some network sniffing tools. I like the idea of arp spoofing [explained here] but I have two questions: Does arp spoofing technique affect the speed of the connection of the ...
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withdraw MAC address assignment

Is it possible to un-claim ownership of a MAC address via special kinds of gratuitous ARP or possibly by sending ARP packets with special addresses (e.g. 00:00:00:00:00:00) to invalidate cache table ...
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What is the difference between ARP binding and DHCP address reservation?

In my TL-WR1043ND I have these functionalities and both of them pair an IP address to a MAC address. What is the difference? I red that the ARP one is there for security reasons, others say it is for ...
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101 views

ARP Entry Lookup for IP Range?

Is there a way to do a ARP lookup via windows console for an IP range? Eg: arp -a 192.168.10.0-254
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228 views

Duplicate IP address Telnet and ARP

I have 3 hosts (PC1, PC2, and PC3). I set the IP addresses for PC2 and PC3 to be 10.0.0.2 and PC3 to be 10.0.0.1. I telnet from PC1 to 10.0.0.2. I then am logged in to PC3. I can see in Wireshark that ...
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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 ...
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Is there an easy way to do a host lookup by MAC address on a LAN?

Is there an easy way (on Linux) to implement host lookup by MAC address? In small local networks, it is easy to use for example arp-scan to find out the IP address of some device. I usually use ...
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40 views

What's the point in arp -g?

I typed arp into Windows CMD and it gave me the options as to what I can do with it. It gave me arp -a (then gave details) and then it showed arp -g which says 'same as -a' So what's the point of ...
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Network connection error. Data-link layer working. Static/DHCP ip assignment failing, with no connection

Trying to connect two virtual machines through a windows (host) tap adapter. One virtual machine is a pfsense router running on VirtualBox, the other an emulated rapsberry pi running raspbian on qemu. ...
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101 views

Why does traceroute show a direct connection to my home network devices instead of going via the router?

I have 2 laptops connected to my home router, with the IP addresses 192.168.1.10 and 192.168.1.11. I use traceroute 192.168.1.11 from the first laptop and I get 1 22 ms 11 ms 33 ms ...
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916 views

How to reverse arp using nping for Windows

I would like to send a reverse ARP to resolve an IP address given a MAC address using nping for Windows. The documentation is not clear on how this should work and I'm unable to find any examples ...
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146 views

is there any way to enable telnet/ssh session into a Netgear CG3700EMR

I want to enable Wake on Wan (Wol from internet) with my router, but i have no chance to modify arp table in order to specify a fake address which could receive this broadcast packet. So, is there ...
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760 views

Why am I not seeing ARP requests from my own machine in wireshark?

I am using Windows 7. I open up Wireshark and start a live capture with the filter: ip.src == THIS.IS.MY.IP I then go to a command line and do an arp -d * and ping a bunch of stuff. I see my ICMP ...
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103 views

Why can't I view the arp table on my VPS server?

I'm running CentOS Linux release 7.0.1406 on a VPS server. Attempted to use the "arp" command and found it was missing. I tried as root as well to make sure the command wasn't in sbin. Then I googled ...
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346 views

Getting lots of pings between two routers on shared Wi-Fi. Why is it happening, and can I prevent it?

My apartment complex has a shared Wi-Fi network. There are two Cisco Meraki MR62 access points on each building, and my MacBook periodically switches between them; which is annoying because it drops ...
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ARP issue changing Internet connection

Ok I'll jump right in the middle of things. I usually connect my laptop to Internet through wifi at home and it works flawlessly. Problems come up when I try to connect to a friend of mine's wifi. The ...
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Find new ips on network

The solution I want to solve is to discover newly connected ip (and preferably mac and vendor) on the local network. So far I've tried arp-scan and nmap. I like arp-scan mainly because it's fast ...
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718 views

IP Address in ARP Cache

I am learning more about networking... I am working on some Wireshark Labs and the subject is ARP. Screen shot of ARP Cache During the lab I did an ARP Cache dump. Fired up Wireshark and went to a ...
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440 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. ...
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120 views

Is there any way to determine if the router is forwarding WoL packet to the NIC card while the computer is turned off?

I am having hard time figuring out whether the problem is with the router not forwarding the packets to the NIC OR the problem is the NIC not waking the PC or other hidden settings that are preventing ...
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128 views

Is Wake On LAN supposed to work even after AC power reset?

So, if you unplug the AC power cable from the wall and re-connect it to the PC Power Supply, is the Wake On Lan functionality still supposed to work on a PC? The WoL functionality is enabled in Bios ...
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1k views

Excessive rate of ARP requests from Windows 7 spooler service when network printer is off

I'm having series of ARP requests broadcast by a laptop over WLAN, asking MAC address for a range of IP (192.168.0.62 --> 192.168.0.94.) The process runs for the range, stops for a 20 or 30 seconds, ...