Public bug reported:
I posted this on the Ubuntu-MATE bug report before this
(https://bugs.launchpad.net/ubuntu-mate/+bug/1711460), but I don't know
how active that place is so I'm also going to post it here. I also don't
know if this is the right package to post this in, but since there is no
clear way to post bugs with ambiguous sources of problems, I am posting
here.
When I do a scan of my local network via the command arp-scan
--localnet, I find that the IP of the machine which has Ubuntu-MATE on
it shows up in the list of IPs brought back by arp-scan. But when I ssh
to that machine and then issue the command arp-scan --localnet from the
machine that I had sshed from, I find that the IP address of the
computer with Ubuntu-MATE on it is absent from the list. I expect the IP
address with the machine with Ubuntu-MATE to show up. I tested this with
other machines and operating systems and those still returned an IP
address when issued arp-scan --localnet. The Ubuntu-MATE machine was the
only one which didn't.
Description: Ubuntu Artful Aardvark (development branch)
Release: 17.10
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: network-manager 1.8.2-1ubuntu2
ProcVersionSignature: Ubuntu 4.11.0-13.19-generic 4.11.12
Uname: Linux 4.11.0-13-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.6-0ubuntu5
Architecture: amd64
Date: Thu Aug 17 14:19:46 2017
IfupdownConfig:
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
InstallationDate: Installed on 2017-01-07 (222 days ago)
InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
IpRoute:
default via 192.168.1.1 dev wlp7s0 proto static metric 600
169.254.0.0/16 dev wlp7s0 scope link metric 1000
192.168.1.0/24 dev wlp7s0 proto kernel scope link src 192.168.1.96 metric 600
NetworkManager.conf:
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: Upgraded to artful on 2017-08-11 (6 days ago)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
wlp7s0 wifi connected /org/freedesktop/NetworkManager/Devices/3
Windows7Family 2 ea6b04bf-6ea5-4250-9783-f8df31fb090a
/org/freedesktop/NetworkManager/ActiveConnection/3
enp6s0 ethernet unavailable /org/freedesktop/NetworkManager/Devices/2 --
-- --
lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/1 --
-- --
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI
WWAN-HW WWAN
running 1.8.2 connected started full enabled enabled
enabled enabled enabled
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug arp-scan artful broadcast network ssh
** Attachment removed: "nmcli-con.txt"
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1711465/+attachment/4934447/+files/nmcli-con.txt
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https://bugs.launchpad.net/bugs/1711465
Title:
IP stops returning to arp-scan when sshed into.
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