Date: Thu, 11 Jul 2024 17:06:18 +0300 From: Odhiambo Washington <odhiambo@gmail.com> To: FreeBSD virtualization <freebsd-virtualization@freebsd.org> Subject: Suddenly unable to access VMs Message-ID: <CAAdA2WMaO8PPnFErZa0gcN-VPD6My4RtJB3u27BYi=8CWMZK=A@mail.gmail.com>
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My bhyve VMs have been all fine until now.
I can't ping them and can't SSH into them. However, I can connect to them
with VNCViewer from a remote host (my PC from my house) :-(
I haven't done any changes on the host at all.
dnsmasq is running, but seems like the VMs aren't getting the IPs for some
reason.
```
cloned_interfaces=3D"bridge0 tap0 tap1 tap2 tap3 tap4 tap5"
ifconfig_bridge0_name=3D"vmbridge"
ifconfig_vmbridge=3D"addm em1 addm tap0 addm tap1 addm tap2 addm tap3 addm
tap4 addm tap5 up"
ifconfig_vmbridge_alias0=3D"inet 172.16.0.1 netmask 255.255.255.0"
```
What might have happened?
root@gw:/home/wash # ifconfig vmbridge
vmbridge: flags=3D1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP>
metric 0 mtu 1500
options=3D0
ether 58:9c:fc:10:df:1d
inet 172.16.0.1 netmask 0xffffff00 broadcast 172.16.0.255
id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200
root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
member: tap5 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 10 priority 128 path cost 2000000
member: tap4 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 9 priority 128 path cost 2000000
member: tap3 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 8 priority 128 path cost 2000000
member: tap2 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 7 priority 128 path cost 2000000
member: tap1 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 6 priority 128 path cost 2000000
member: tap0 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 5 priority 128 path cost 2000000
member: em1 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP>
ifmaxaddr 0 port 2 priority 128 path cost 55
groups: bridge
nd6 options=3D9<PERFORMNUD,IFDISABLED>
root@gw:/home/wash # ssh 172.16.0.99
ssh: connect to host 172.16.0.99 port 22: Permission denied
root@gw:/home/wash # ssh 172.16.0.100
ssh: connect to host 172.16.0.100 port 22: Permission denied
root@gw:/home/wash # ping 172.16.0.100
PING 172.16.0.100 (172.16.0.100): 56 data bytes
ping: sendto: Permission denied
ping: sendto: Permission denied
ping: sendto: Permission denied
ping: sendto: Permission denied
^C
--- 172.16.0.100 ping statistics ---
4 packets transmitted, 0 packets received, 100.0% packet loss
root@gw:/home/wash # ping 172.16.0.99
PING 172.16.0.99 (172.16.0.99): 56 data bytes
ping: sendto: Permission denied
ping: sendto: Permission denied
ping: sendto: Permission denied
^C
--- 172.16.0.99 ping statistics ---
3 packets transmitted, 0 packets received, 100.0% packet loss
root@gw:/home/wash # service dnsmasq status
dnsmasq is running as pid 4190.
root@gw:/home/wash #
--=20
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
In an Internet failure case, the #1 suspect is a constant: DNS.
"Oh, the cruft.", egrep -v '^$|^.*#' =C2=AF\_(=E3=83=84)_/=C2=AF :-)
[How to ask smart questions:
http://www.catb.org/~esr/faqs/smart-questions.html]
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<div dir=3D"ltr">My bhyve VMs have been all fine until=C2=A0now.<div>I can&=
#39;t ping them and can't SSH into them. However, I can connect to them=
with VNCViewer from a remote host (my PC from my house) :-(</div><div><br>=
</div><div>I haven't done any changes on the host at all.</div><div>dns=
masq is running, but seems like the VMs aren't getting the IPs for some=
reason.</div><div><br></div><div>```</div><div>cloned_interfaces=3D"b=
ridge0 tap0 tap1 tap2 tap3 tap4 tap5"<br>ifconfig_bridge0_name=3D"=
;vmbridge"<br>ifconfig_vmbridge=3D"addm em1 addm tap0 addm tap1 a=
ddm tap2 addm tap3 addm tap4 addm tap5 up"<br>ifconfig_vmbridge_alias0=
=3D"inet 172.16.0.1 netmask 255.255.255.0"</div><div>```<br><div>=
What might have happened?</div><div><br></div><div><br></div><div>root@gw:/=
home/wash # ifconfig vmbridge<br>vmbridge: flags=3D1008843<UP,BROADCAST,=
RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500<br>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 options=3D0<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 ether 58:9c:fc:10:=
df:1d<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 inet 172.16.0.1 netmask 0xffffff00 bro=
adcast 172.16.0.255<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 id 00:00:00:00:00:00 pri=
ority 32768 hellotime 2 fwddelay 15<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 maxage 2=
0 holdcnt 6 proto rstp maxaddr 2000 timeout 1200<br>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0<br>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 member: tap5 flags=3D143<LEARNING,DISCOVER,AUTOEDGE=
,AUTOPTP><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ifm=
axaddr 0 port 10 priority 128 path cost 2000000<br>=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 member: tap4 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP><br>=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ifmaxaddr 0 port 9 =
priority 128 path cost 2000000<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 member: tap3 =
flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP><br>=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ifmaxaddr 0 port 8 priority 128 path=
cost 2000000<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 member: tap2 flags=3D143<LE=
ARNING,DISCOVER,AUTOEDGE,AUTOPTP><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 ifmaxaddr 0 port 7 priority 128 path cost 2000000<br>=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 member: tap1 flags=3D143<LEARNING,DISCOVER,A=
UTOEDGE,AUTOPTP><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 ifmaxaddr 0 port 6 priority 128 path cost 2000000<br>=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 member: tap0 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP&g=
t;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ifmaxaddr 0 p=
ort 5 priority 128 path cost 2000000<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 member:=
em1 flags=3D143<LEARNING,DISCOVER,AUTOEDGE,AUTOPTP><br>=C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ifmaxaddr 0 port 2 priority 128 =
path cost 55<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 groups: bridge<br>=C2=A0 =C2=A0=
=C2=A0 =C2=A0 nd6 options=3D9<PERFORMNUD,IFDISABLED><br>root@gw:/hom=
e/wash # ssh 172.16.0.99<br>ssh: connect to host 172.16.0.99 port 22: Permi=
ssion denied<br>root@gw:/home/wash # ssh 172.16.0.100<br>ssh: connect to ho=
st 172.16.0.100 port 22: Permission denied<br>root@gw:/home/wash # ping 172=
.16.0.100<br>PING 172.16.0.100 (172.16.0.100): 56 data bytes<br>ping: sendt=
o: Permission denied<br>ping: sendto: Permission denied<br>ping: sendto: Pe=
rmission denied<br>ping: sendto: Permission denied<br>^C<br>--- 172.16.0.10=
0 ping statistics ---<br>4 packets transmitted, 0 packets received, 100.0% =
packet loss<br>root@gw:/home/wash # ping 172.16.0.99<br>PING 172.16.0.99 (1=
72.16.0.99): 56 data bytes<br>ping: sendto: Permission denied<br>ping: send=
to: Permission denied<br>ping: sendto: Permission denied<br>^C<br>--- 172.1=
6.0.99 ping statistics ---<br>3 packets transmitted, 0 packets received, 10=
0.0% packet loss<br>root@gw:/home/wash # service dnsmasq status<br>dnsmasq =
is running as pid 4190.<br>root@gw:/home/wash #<br></div><div><br></div><di=
v><br clear=3D"all"><div><br></div><span class=3D"gmail_signature_prefix">-=
- </span><br><div dir=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"g=
mail_signature"><div dir=3D"ltr"><div dir=3D"ltr"><div>Best regards,<br>Odh=
iambo WASHINGTON,<br>Nairobi,KE<br>+254 7 3200 0004/+254 7 2274 3223</div><=
div><span style=3D"color:rgb(34,34,34)">=C2=A0In=C2=A0</span><span style=3D=
"color:rgb(34,34,34)">an Internet failure case, the #1 suspect is a constan=
t: DNS.</span><br>"<span style=3D"font-size:12.8px">Oh, the cruft.</sp=
an><span style=3D"font-size:12.8px">",=C2=A0</span><span style=3D"font=
-size:12.8px">egrep -v '^$|^.*#'=C2=A0</span><span style=3D"backgro=
und-color:rgb(34,34,34);color:rgb(238,238,238);font-family:"Lucida Con=
sole",Consolas,"Courier New",monospace;font-size:13.6px">=C2=
=AF\_(=E3=83=84)_/=C2=AF</span><span style=3D"font-size:12.8px">=C2=A0:-)</=
span></div><div><span style=3D"font-size:12.8px">[How to ask smart question=
s:=C2=A0</span><span style=3D"font-size:12.8px"><a href=3D"http://www.catb.=
org/~esr/faqs/smart-questions.html" target=3D"_blank">http://www.catb.org/~=
esr/faqs/smart-questions.html</a>]</span></div></div></div></div></div></di=
v></div>
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