Had a query regarding ARP spoofing.
Can anyone drop some ideas about how ARP spoofing can be prevented?
Any countermeasures of some sort would be appreciated.
Solved ARP Spoofing
@Atharva-Bet , I hope all is well. Great question...
ARP Spoofing Prevention -
Use a Virtual Private Network (VPN) — allows devices to connect to the Internet through an encrypted tunnel, making all communication encrypted, and worthless for an ARP spoofing attacker.
Use static ARP — the ARP protocol lets you define a static ARP entry for an IP address and prevent devices from listening on ARP responses for that address. For example, if a workstation always connects to the same router, you can define a static ARP entry for that router, preventing an attack.
Use packet filtering — packet filtering solutions can identify poisoned ARP packets by seeing that they contain conflicting source information and stop them before they reach devices on your network.
Run a spoofing attack — check if your existing defenses are working by mounting a spoofing attack, in coordination with IT and security teams. If the attack succeeds, identify weak points in your defensive measures and remediate them.
@Atharva-Bet Dynamic ARP Inspection (DAI) is another option which you can configure on most half way modern switches to prevent ARP spoofing attacks.
DAI allows you to specify ports as trusted or un trusted, and verifies IPv4 address to MAC address bindings using the DHCP snooping binding database (which means you also need DHCP snooping enabled)
If a MAC address to IP binding mismatch occurs on an untrusted port, DAI discards the packets - if a mismatch occurs on a trusted port DAI (by default) does not take any action, so be careful specifying those ports.
You might also want to activate something like storm control on the relevant ports to prevent flooding attacks, since DAI won't help you there!
DynArp is a great way to control and monitor only authorized MAC addresses, while filtering invalid MAC addresses, helping to mitigate man-in-the-middle attacks or forwarding redirects.
Knowledge is a road to be traveled upon, not a destination to be reached~~
Thank you so much y'all! ITProTv community for the win All the answers are extremely helpful.