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ARP cache MAC and Docker
why do I get a different MAC address using arp and ifconfig?IP Address in ARP CacheCannot delete entry from ARP cacheArp Address MismatchIs my arp cache poisoned?Can't Delete ARP Cache on Windows 7 x64ARP Cache location on windows 10Where is the ARP cache on Linux?In WLAN network, does ARP always show the mac address of device's Wi-Fi interface?Make an ARp table using fake IP and Fake MAC
When I run cat /proc/net/arp I see two entries* bound to :
IP address HW type Flags HW address Mask Device
35.224.99.156 0x1 0x0 00:00:00:00:00:00 * docker0
35.222.85.5 0x1 0x0 00:00:00:00:00:00 * docker0
Even after ip -s -s neigh flush all and arp -n these entries come back. What do the results above mean?
Why is the ARP binding the docker0 device to an IPs (35.224.99.156) and (35.222.85.5) with mac 00:00:00:00:00:00 which I do not recognise all though they are from Google Cloud/Google or spoofed to be as such.
Is this expected, a bug or corruption or something more sinister?
*detected originally using OSQuery
SELECT address, mac, COUNT(mac) AS mac_count
FROM arp_cache GROUP BY mac
HAVING count(mac) > 1;
docker network inspect bridge is
[
{
"Name": "bridge",
"Id": "REDACTED",
"Created": "2019-02-09T17:38:43.817882245Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
},
"Labels": {}
}
]
networking docker mac-address arp google-cloud-platform
asked Feb 7 at 17:02
Gridcell CoderGridcell Coder
133
add a comment |
When I run cat /proc/net/arp I see two entries* bound to :
IP address HW type Flags HW address Mask Device
35.224.99.156 0x1 0x0 00:00:00:00:00:00 * docker0
35.222.85.5 0x1 0x0 00:00:00:00:00:00 * docker0
Even after ip -s -s neigh flush all and arp -n these entries come back. What do the results above mean?
Why is the ARP binding the docker0 device to an IPs (35.224.99.156) and (35.222.85.5) with mac 00:00:00:00:00:00 which I do not recognise all though they are from Google Cloud/Google or spoofed to be as such.
Is this expected, a bug or corruption or something more sinister?
*detected originally using OSQuery
SELECT address, mac, COUNT(mac) AS mac_count
FROM arp_cache GROUP BY mac
HAVING count(mac) > 1;
docker network inspect bridge is
[
{
"Name": "bridge",
"Id": "REDACTED",
"Created": "2019-02-09T17:38:43.817882245Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
},
"Labels": {}
}
]
networking docker mac-address arp google-cloud-platform
asked Feb 7 at 17:02
Gridcell CoderGridcell Coder
133
Include thedocker network inspect bridgeoutput.
– BMitch
Feb 8 at 14:22
@BMitch post updated with output
– Gridcell Coder
Feb 9 at 18:13
add a comment |
When I run cat /proc/net/arp I see two entries* bound to :
IP address HW type Flags HW address Mask Device
35.224.99.156 0x1 0x0 00:00:00:00:00:00 * docker0
35.222.85.5 0x1 0x0 00:00:00:00:00:00 * docker0
Even after ip -s -s neigh flush all and arp -n these entries come back. What do the results above mean?
Why is the ARP binding the docker0 device to an IPs (35.224.99.156) and (35.222.85.5) with mac 00:00:00:00:00:00 which I do not recognise all though they are from Google Cloud/Google or spoofed to be as such.
Is this expected, a bug or corruption or something more sinister?
*detected originally using OSQuery
SELECT address, mac, COUNT(mac) AS mac_count
FROM arp_cache GROUP BY mac
HAVING count(mac) > 1;
docker network inspect bridge is
[
{
"Name": "bridge",
"Id": "REDACTED",
"Created": "2019-02-09T17:38:43.817882245Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
},
"Labels": {}
}
]
networking docker mac-address arp google-cloud-platform
asked Feb 7 at 17:02
Gridcell CoderGridcell Coder
133
When I run cat /proc/net/arp I see two entries* bound to :
IP address HW type Flags HW address Mask Device
35.224.99.156 0x1 0x0 00:00:00:00:00:00 * docker0
35.222.85.5 0x1 0x0 00:00:00:00:00:00 * docker0
Even after ip -s -s neigh flush all and arp -n these entries come back. What do the results above mean?
Why is the ARP binding the docker0 device to an IPs (35.224.99.156) and (35.222.85.5) with mac 00:00:00:00:00:00 which I do not recognise all though they are from Google Cloud/Google or spoofed to be as such.
Is this expected, a bug or corruption or something more sinister?
*detected originally using OSQuery
SELECT address, mac, COUNT(mac) AS mac_count
FROM arp_cache GROUP BY mac
HAVING count(mac) > 1;
docker network inspect bridge is
[
{
"Name": "bridge",
"Id": "REDACTED",
"Created": "2019-02-09T17:38:43.817882245Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
},
"Labels": {}
}
]
networking docker mac-address arp google-cloud-platform
networking docker mac-address arp google-cloud-platform
asked Feb 7 at 17:02
Gridcell CoderGridcell Coder
133
asked Feb 7 at 17:02
Gridcell CoderGridcell Coder
133
edited Feb 9 at 18:12
Gridcell Coder
asked Feb 7 at 17:02
Gridcell CoderGridcell Coder
133
asked Feb 7 at 17:02
Gridcell CoderGridcell Coder
133
asked Feb 7 at 17:02
Gridcell CoderGridcell Coder
133
133
Include thedocker network inspect bridgeoutput.
– BMitch
Feb 8 at 14:22
@BMitch post updated with output
– Gridcell Coder
Feb 9 at 18:13
add a comment |
Include thedocker network inspect bridgeoutput.
– BMitch
Feb 8 at 14:22
@BMitch post updated with output
– Gridcell Coder
Feb 9 at 18:13
Include the
docker network inspect bridge output.– BMitch
Feb 8 at 14:22
Include the
docker network inspect bridge output.– BMitch
Feb 8 at 14:22
@BMitch post updated with output
– Gridcell Coder
Feb 9 at 18:13
@BMitch post updated with output
– Gridcell Coder
Feb 9 at 18:13
add a comment |
1 Answer
1
active
oldest
votes
These are from connectivity-checks made by NetworkManager.
# nslookup connectivity-check.ubuntu.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: connectivity-check.ubuntu.com
Address: 35.224.99.156
Name: connectivity-check.ubuntu.com
Address: 35.222.85.5
There is a bug so the arp-request go out the wrong interfaces. See: https://bugzilla.redhat.com/show_bug.cgi?id=1634286
You can prevent this by removing the package network-manager-config-connectivity-ubuntu
apt purge network-manager-config-connectivity-ubuntu
answered 6 hours ago
David WeberDavid Weber
362
New contributor
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
These are from connectivity-checks made by NetworkManager.
# nslookup connectivity-check.ubuntu.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: connectivity-check.ubuntu.com
Address: 35.224.99.156
Name: connectivity-check.ubuntu.com
Address: 35.222.85.5
There is a bug so the arp-request go out the wrong interfaces. See: https://bugzilla.redhat.com/show_bug.cgi?id=1634286
You can prevent this by removing the package network-manager-config-connectivity-ubuntu
apt purge network-manager-config-connectivity-ubuntu
answered 6 hours ago
David WeberDavid Weber
362
New contributor
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
These are from connectivity-checks made by NetworkManager.
# nslookup connectivity-check.ubuntu.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: connectivity-check.ubuntu.com
Address: 35.224.99.156
Name: connectivity-check.ubuntu.com
Address: 35.222.85.5
There is a bug so the arp-request go out the wrong interfaces. See: https://bugzilla.redhat.com/show_bug.cgi?id=1634286
You can prevent this by removing the package network-manager-config-connectivity-ubuntu
apt purge network-manager-config-connectivity-ubuntu
answered 6 hours ago
David WeberDavid Weber
362
New contributor
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
These are from connectivity-checks made by NetworkManager.
# nslookup connectivity-check.ubuntu.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: connectivity-check.ubuntu.com
Address: 35.224.99.156
Name: connectivity-check.ubuntu.com
Address: 35.222.85.5
There is a bug so the arp-request go out the wrong interfaces. See: https://bugzilla.redhat.com/show_bug.cgi?id=1634286
You can prevent this by removing the package network-manager-config-connectivity-ubuntu
apt purge network-manager-config-connectivity-ubuntu
answered 6 hours ago
David WeberDavid Weber
362
New contributor
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
These are from connectivity-checks made by NetworkManager.
# nslookup connectivity-check.ubuntu.com
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: connectivity-check.ubuntu.com
Address: 35.224.99.156
Name: connectivity-check.ubuntu.com
Address: 35.222.85.5
There is a bug so the arp-request go out the wrong interfaces. See: https://bugzilla.redhat.com/show_bug.cgi?id=1634286
You can prevent this by removing the package network-manager-config-connectivity-ubuntu
apt purge network-manager-config-connectivity-ubuntu
answered 6 hours ago
David WeberDavid Weber
362
New contributor
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 4 hours ago
answered 6 hours ago
David WeberDavid Weber
362
New contributor
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 6 hours ago
David WeberDavid Weber
362
answered 6 hours ago
David WeberDavid Weber
362
362
New contributor
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
David Weber is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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Include the
docker network inspect bridgeoutput.– BMitch
Feb 8 at 14:22
@BMitch post updated with output
– Gridcell Coder
Feb 9 at 18:13