Questions tagged [arp]

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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How can i find device type and name in linux terminal without install nmap and other similar tools from it ip address?

I'm looking for find a way to get device name and type like ESET Connected Home Monitor . Eset : Connected Home Monitor can help identify vulnerabilities in your home network such as open ports or a ...
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Manually sending ARP packets using bash

How could I send ARP packet to specified IP on a LAN using bash or some Linux utility?
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Make a remote host have a local IP address with ARP capability(Steam Link)

Currently I have two subnets in the 10.0.0.0/16, which are 10.40.20.0/24, let's say that's A and 10.32.80.0/24, B. My PC is in the subnet A and what I'm going to do is use Steam Link, Oculus Air Link ...
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Retransmission in less than one second

On my Linux machine I use nc to communicate with a echo server running on my android device. I use nc to send text to port 65303 of the android device. After entering test1 the same text is sent back ...
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ARP broadcast, is my understanding correct?

Having studied more of the networking side of the Internet from the perspective of a front-end web developer, the concept of ARP is still causing me confusion - but I have made some progress with ...
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Why did tcpdump output differs for arp requests?

There are two ARP requests, first one is from gateway and second from pc in same network. Traffic is captured by tcpdump -nn -e -i enp1s0 arp. The gateway make requests automatically, the pc uses ncat ...
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PC keeps sending ARP requests to my STM32 (who has 192.168.0.111 ? tell 192.168.0.123) although I keep sending it the reply (192.168.0.111 is at ...)

I am trying to make the communication between my PC and STM32F7 "manual" (without a communication stack) so I coded all the frames that are supposed to be send from the STM32 to the PC ...
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is there table like Ipv4 ARP for IPv6 in linux? where can i (path) find it?

where can i find NDP table in linux? I'm trying to list the neigbours for the ipv6 address for my appliaction. ip neigh is the command which we use to show the neigh ip address (both ipv4 and ipv6)...
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ARP cache clear on mac

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" on macOS catalina v 10.15.7 ...
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How is ARP reply generated from Windows 10? Sending ARP req from embedded device through ethernet port to windows10 on laptop

I want to send an ARP request using my embedded device through the ethernet cable to my laptop that has windows 10 on it. I want to receive an ARP reply from windows back to my embedded device through ...
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Couldn't arp for host, Kali Linux

I am currently learning the basics of cybersecurity and I am trying to follow the following tutorial on ARP spoofing. I am using kali linux on a VirtualBox VM on my Windows pc to redirect my windows ...
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How to get all IP addresses from connected devices with specific device name?

I'm making Bash script for automation and would like to get all IP addresses from connected devices with specific device name? For example I have 10 devices connected to Wi-Fi. All with same device ...
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Why there are some entries in the Mikrotik RouterOS ip-scan table who don't have MAC addresses or RTTs?

There is a command /tool ip-scan in the RouterOS, which basically does network scanning. It works quite efficiently, however, there is something I can't understand in its behaviour. For some network ...
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Severe ARP flooding from PC requesting link-local address

TLDR; PC is sending ARP Who is requests for a link local address 169.254.xxx.xxx continuously every second. Only on this device. My PC begins to send constant ARP requests to the router for "Who ...
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GNS3 Wireshark packet missing?

I just have started learning networking. Now i am trying to understand ARP, using GNS3 and Wireshark. I created a simple network with 2 PCs, which are connected by switch, and started capturing ...
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Extra entry in ARP table?

I am new to networking so please have mercy on my noob soul... I hope this question is acceptable for this forum. It just got kicked out of the networkengineering.stackexchange.com forum, so I'm ...
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Unusual amount of ARP who is on WLAN form unknown IP

I am seeing a unusual amount of ARP traffic on my Wireless network. My wireless network is on the subnet 192.168.1.0/24 but the ARPs are coming from 10.215.0.1 which is not in my subnet. It is also ...
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Intermittent ARP no response

What would cause ARP responses to go unreturned? I am having some issues with my home network. I have one main router, running OpenWRT at 192.168.1.1. The router is connected to two unmanaged trendnet ...
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Multiple ARP requests from an IP address outside my LAN using an unknown MAC address

I have a vexing recent issue on what has been, for the most part, a very reliable home network. Since it is a hobby for me, it’s probably a little more complicated than the average home, but it’s ...
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ONT doesn't answer ARP request

I've been working with a custom linux image, based on yocto, running on an industrial tablet. During my tests, I've faced some problems to connect to a wifi network after rebooting the device. Before ...
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How Does a Computer Initially Connect to a Router / Network

If I have a computer with a network card, it will have a MAC address and a localhost IP of 127.0.0.1. So how does a computer with a network card discover routers and connect to them initially? I ...
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Why keeps my Virtual Machine sending ARP messages in internal network?

Following setup: Windows 10 host system runs 2 Ubuntu 20.04 Virtual Machines from VirtualBox. Both the VMs have their network adapter set to "internal" mode, which means only an internal ...
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'Destination Host Unreachable' when pinging a printer from some hosts on local network

Problem I have a Brother MFC-2700DW on my LAN I'm trying to access from a variety of devices. I've assigned a static hostname (ohbrother) and IP (192.168.2.135) for it in my OpenWRT router. What's ...
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How to Wake on WAN without broadcast address?

--- Recap of the possible solutions at the bottom --- First of all I apologize if I write something that makes no sense. My knowledge of networks didn't go beyond what an IP address is until 3 days ...
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Doubts on Mac address of Guest OS configured in bridged mode

I'm running Kali ( guest OS ) in workstation pro. My host OS is windows 10. Guest OS is configured in Bridged networking mode. Consider the following parameters of :- Guest OS - IP_G:MAC_G Host OS - ...
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Arp poisoning with Ettercap makes the target unable to connect to sites

So I was messing around with Ettercap on my kali Linux and doing arp spoofing with my target machine being a mac laptop. After successfully poisoning the machine (checked with chk_poison) the machine ...
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Is it safe to use ARP Poisoning + DNS Spoofing for a PiHole instead of setting it as a DNS Server?

Let's say I have a techno-illiterate friend I would like to set up with a PiHole (DNS Blackhole). Would it be possible (and relatively secure) to configure a Raspberry Pi to be a plug and play device ...
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Retrieving MAC address via tunnel

Currently I'm working on adding my own software to provide internet support to an old MS-DOS game. Because my primary environment is Linux, I use DOSBOX from within Linux and feed my internet ...
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why is "arp -a" showing inconsistent outputs that are vastly different?

I have newly set up a computer with Ubuntu 18.04 and connected to my home wifi. When I try arp -a command to scan other devices connected to the same network, I see some very weird outputs. First, the ...
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Send multiple ARP requests with different source MAC

Can I send a flood of ARP requests with multiple random source MAC addresses using Ubuntu 20.04 to a single destination IP address?
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ARP IP addresses. Am I in trouble somehow?

I recently got a message from Norton Antivirus: New network detected and saved which confused me. I found out that I can check that with arp -a so I did. I noticed about 100 different IP addresses. Is ...
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Windows 10 sends ARP request only on 2nd attempt to reach the IP

When I try to open a TCP connection from my Windows 10 laptop to an IP on my LAN that is not present in the ARP cache (eg. when the laptop comes back from sleep), the connection fails on the first ...
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Connection issues when router in bridge mode is between modem-router and user device

I decided to extend my home network's wireless coverage by utilizing a spare router. Both routers are modem-routers and have been provided by different internet providers the previous years. So, their ...
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How to scan a network for MAC addresses?

From my router (running OpenBSD) I can do: arp-scan --interface=em1 --localnet And get a list of all IP addresses and corresponding MAC addresses on my network. But is it possible to scan for a ...
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How to setup proxy ARP in linux network namespace?

I'm running a veth pair - one end in the root namespace(let's call it inner), the other(let's call it outer) inside a different namespace. From the namespace I'd like to set up proxy ARP on outer ...
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Is XArp detecting a false positive?

Today I really got into ARP protocol and its attacks. I tried to download xArp to test my network and it said there was an attack detected. Then I researched something more about it, but I found ...
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I don't recognize this HW address format

I'm looking at the contents of /proc/net/arp from a google wifi onhub's diagnostic report and the format of the HW address is confusing because it's missing a character and ends with an asterix. Does ...
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How does a network device update its MAC table?

When a network device updates its MAC table, what protocol is being called? I am pretty sure it is ARP, but correct me if I am wrong! What messages are being sent and from whom, what information is ...
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Chain arp and nslookup to get hostname for each ip (Win)

I would like to see the name of the devices when i do arp -a. As far as I understand there is no option to do it directly with arp. So I thought that maybe it is possible to do nslookup for every ip ...
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Need of ARP request before DHCP Offer [duplicate]

When I connect my system with Router, the IP address is assigned by DHCP Server in that router. When the DHCP Request goes to the DHCP server from the system, it offers the IP address as broadcast. ...
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Laptop keeps disconnecting from WiFi (Netgear WNR614 N300)

So my laptop(Ubuntu 20.04) keeps DC'ing from my WiFi. But my phone is properly connected to it and so is my amazon fire stick. I ran wireshark to check the problem and there seemed to be an ARP issue. ...
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Unable to Get LAN Device Name Using NMAP or Arp

I want to get a list of the "friendly" device names on my network. Everything I'm reading says, I should absolutely be able to do this via nmap. However, it doesn't work for me: Starting ...
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could see half list of ip,mac addresses and host name

Here is my code, I have tried in power shell, I can see only half list of IP, mac address and host-name, unable to see my manager's IP address while I can see my colleagues IP address. $result = New-...
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ARP requests not reaching user space on raspberry pi

I have a couple Raspberry Pi 3B/3B+ that I'm running k3s on. The Pis are connected using WiFi only. I'm trying to use MetalLB to get load balancing, but I have problems getting it to work. MetalLB ...
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How to prevent ARP spoofing in local network

ARP poisoning is rampant in my local network, lucky for those computer that can install programs that defend against it, but not every devices can be installed one such as some smartphones(requires ...
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how does arp scanning cross the network layer?

I have the following setup in my network: cc:cc:cc:cc:cc:cc -------- 192.168.1.5/24 phone bb:bb:bb:bb:bb:bb (other networks and ...
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Who does this IP belong to, possible spoofing attack?

I am currently using a TalkTalk router to access my home network. I've had issues previously with my connection being either slow or cutting out fully (not a common issue). I download XARP ...
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Correlation between DHCP and ARP

Can someone explain why there are so many ARP packets broadcasted from my client? And why is looking for my DHCP server?
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delete several permanent entries from arp table by command line

I am trying to remove the permanent entries from my arp table. but the following command only removes those that are not permanent ip -s -s neigh flush all With the arp utility I was able to ...
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ARP request doesn't reach the host

I have a fairly basic, local, wireless network. I have an Ubuntu media server/file share, a desktop PC, a laptop, mobiles and a TV. The issue I am facing since I got the server (for 2-3 months now) is ...
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