Mike McCarty:
> I've been watching my LAN using tcpdump, and noticed
> that ARP is running repeatedly on my FC2 machine, and
> wonder why.
ARP is used by TCP/IP to resolve an IP address such as
172.17.205.79 to a unique hardware address, 00:11:95:0b:cc:28
Communicates between two computers on the same subnet as the host
server.
You can improve the connection speed to a server used most often is
to make the static entry in ARP cache.
Example:
router:~# arp -s 172.17.205.79 00:11:95:0b:cc:28
I think. That might be Windows.
arp -h for help
Usage:
arp [-vn] [<HW>] [-i <if>] [-a] [<hostname>] <-Display ARP cache
arp [-v] [-i <if>] -d <hostname> [pub][nopub] <-Delete ARP entry
arp [-vnD] [<HW>] [-i <if>] -f [<filename>] <-Add entry from file
arp [-v] [<HW>] [-i <if>] -s <hostname> <hwaddr> [temp][nopub] <-Add entry
arp [-v] [<HW>] [-i <if>] -s <hostname> <hwaddr> [netmask <nm>] pub <-''-
arp [-v] [<HW>] [-i <if>] -Ds <hostname> <if> [netmask <nm>] pub <-''-
-a display (all) hosts in alternative (BSD) style
-s, --set set a new ARP entry
-d, --delete delete a specified entry
-v, --verbose be verbose
-n, --numeric don't resolve names
-i, --device specify network interface (e.g. eth0)
-D, --use-device read <hwaddr> from given device
-A, -p, --protocol specify protocol family
-f, --file read new entries from file or from /etc/ethers
> Why should it care?
It has to know where to go. Can you drive cross country
without a road map?
I've read somewhere, to prevent ARP spoofing,
install a print server on the network.
Krack
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