Do incoming LAN UDP packets create an entry containing senders MAC in receivers ARP table in Linux?
Clash Royale CLAN TAG#URR8PPP
up vote
0
down vote
favorite
When Linux receives a UDP packet originating from a sender having a LAN source IP, will Linux put the source MAC address of this packet along the source IP address into the ARP cache table?
linux udp arp
asked Sep 25 '17 at 14:56
thomas
26527
add a comment |Â
up vote
0
down vote
favorite
When Linux receives a UDP packet originating from a sender having a LAN source IP, will Linux put the source MAC address of this packet along the source IP address into the ARP cache table?
linux udp arp
asked Sep 25 '17 at 14:56
thomas
26527
Have you tried it?
– Stephen Kitt
Sep 25 '17 at 14:58
I'm about to try it.
– thomas
Sep 25 '17 at 15:00
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
When Linux receives a UDP packet originating from a sender having a LAN source IP, will Linux put the source MAC address of this packet along the source IP address into the ARP cache table?
linux udp arp
asked Sep 25 '17 at 14:56
thomas
26527
When Linux receives a UDP packet originating from a sender having a LAN source IP, will Linux put the source MAC address of this packet along the source IP address into the ARP cache table?
linux udp arp
linux udp arp
asked Sep 25 '17 at 14:56
thomas
26527
asked Sep 25 '17 at 14:56
thomas
26527
asked Sep 25 '17 at 14:56
thomas
26527
asked Sep 25 '17 at 14:56
thomas
26527
asked Sep 25 '17 at 14:56
thomas
26527
26527
Have you tried it?
– Stephen Kitt
Sep 25 '17 at 14:58
I'm about to try it.
– thomas
Sep 25 '17 at 15:00
add a comment |Â
Have you tried it?
– Stephen Kitt
Sep 25 '17 at 14:58
I'm about to try it.
– thomas
Sep 25 '17 at 15:00
Have you tried it?
– Stephen Kitt
Sep 25 '17 at 14:58
Have you tried it?
– Stephen Kitt
Sep 25 '17 at 14:58
I'm about to try it.
– thomas
Sep 25 '17 at 15:00
I'm about to try it.
– thomas
Sep 25 '17 at 15:00
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
1
down vote
accepted
I tried Linux 4.9 and the answer in this case is no. I crafted an UDP packet with an artificial IP address and MAC address combo, which was received by the Linux-under-Test and displayed correctly by netcat. No ARP entry was created (also no incomplete one) and Linux did not send any ARP request regarding the artificial IP address.
answered Sep 25 '17 at 15:32
thomas
26527
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
I tried Linux 4.9 and the answer in this case is no. I crafted an UDP packet with an artificial IP address and MAC address combo, which was received by the Linux-under-Test and displayed correctly by netcat. No ARP entry was created (also no incomplete one) and Linux did not send any ARP request regarding the artificial IP address.
answered Sep 25 '17 at 15:32
thomas
26527
add a comment |Â
up vote
1
down vote
accepted
I tried Linux 4.9 and the answer in this case is no. I crafted an UDP packet with an artificial IP address and MAC address combo, which was received by the Linux-under-Test and displayed correctly by netcat. No ARP entry was created (also no incomplete one) and Linux did not send any ARP request regarding the artificial IP address.
answered Sep 25 '17 at 15:32
thomas
26527
add a comment |Â
up vote
1
down vote
accepted
up vote
1
down vote
accepted
I tried Linux 4.9 and the answer in this case is no. I crafted an UDP packet with an artificial IP address and MAC address combo, which was received by the Linux-under-Test and displayed correctly by netcat. No ARP entry was created (also no incomplete one) and Linux did not send any ARP request regarding the artificial IP address.
answered Sep 25 '17 at 15:32
thomas
26527
I tried Linux 4.9 and the answer in this case is no. I crafted an UDP packet with an artificial IP address and MAC address combo, which was received by the Linux-under-Test and displayed correctly by netcat. No ARP entry was created (also no incomplete one) and Linux did not send any ARP request regarding the artificial IP address.
answered Sep 25 '17 at 15:32
thomas
26527
answered Sep 25 '17 at 15:32
thomas
26527
answered Sep 25 '17 at 15:32
thomas
26527
answered Sep 25 '17 at 15:32
thomas
26527
26527
add a comment |Â
add a comment |Â
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f394328%2fdo-incoming-lan-udp-packets-create-an-entry-containing-senders-mac-in-receivers%23new-answer', 'question_page');
);
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Have you tried it?
– Stephen Kitt
Sep 25 '17 at 14:58
I'm about to try it.
– thomas
Sep 25 '17 at 15:00