Weird turnoff

The Doctor doctor at doctor.nl2k.ab.ca
Tue Oct 3 13:54:04 UTC 2017 

On Tue, Oct 03, 2017 at 11:38:17AM +0100, Dave wrote:
> On Monday 02 October 2017 10:06:26 Mario Lobo wrote:
> > On Sun, 1 Oct 2017 18:25:06 -0600
> > The Doctor <doctor at doctor.nl2k.ab.ca> wrote:
> > 
> > > On Mon, Oct 02, 2017 at 02:11:40AM +0200, Polytropon wrote:
> > > > On Sun, 1 Oct 2017 17:25:31 -0600, The Doctor wrote:  
> > > > > Could be an attack.
> > > > > 
> > > > > All right.
> > > > > 
> > > > > As of this morning (3 p.m. UTC) my seconday FreeBSD 11.1 server
> > > > > has been going intreface down then up and then unable to route.
> > > > > 
> > > > > Rebooted this system 2 times today.
> > > > > 
> > > > > 
> > > > > What should I bee looking for?  
> > > > 
> > > > Primarily the system's log files in /var/log: messages, auth.log,
> > > > security. Also check the output of the periodic scripts (mailed
> > > > to root or another user), do they contain hints to something that
> > > > looks suspicious (SUID changes, system file modifications, etc.)?
> > > >  
> > > 
> > > exactly what I am looking for
> > > 
> > > I am going to have to do a transcribe as I am opreating from the
> > > potential victim and ssh'ing to this terminal
> > > 
> > > or ftp the information over
> > > 
> > > 
> > > Oct  1 16:56:46 gallifrey kernel: igb0: link state changed to DOWN
> > > Oct  1 17:00:10 gallifrey kernel: igb0: link state changed to UP
> > > Oct  1 17:17:32 gallifrey kernel: igb0: <Intel(R) PRO/1000 Network
> > > Connection, Version - 2.5.3-k> port 0x6020-0x603f mem
> > > 0xc7120000-0xc713ffff,0xc7144000-0xc7147fff irq 26 at device 0.0
> > > numa-domain 0 on pci3 Oct  1 17:17:32 gallifrey kernel: igb0: Using
> > > MSIX interrupts with 9 vectors Oct  1 17:17:32 gallifrey kernel:
> > > igb0: Ethernet address: 0c:c4:7a:ac:51:20 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: Bound queue 0 to cpu 0 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: Bound queue 1 to cpu 1 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: Bound queue 2 to cpu 2 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: Bound queue 3 to cpu 3 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: Bound queue 4 to cpu 4 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: Bound queue 5 to cpu 5 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: Bound queue 6 to cpu 6 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: Bound queue 7 to cpu 7 Oct  1 17:17:32 gallifrey
> > > kernel: igb0: netmap queues/slots: TX 8/1024, RX 8/1024 Oct  1
> > > 17:17:32 gallifrey kernel: igb1: <Intel(R) PRO/1000 Network
> > > Connection, Version - 2.5.3-k> port 0x6000-0x601f mem
> > > 0xc7100000-0xc711ffff,0xc7140000-0xc7143fff irq 28 at device 0.1
> > > numa-domain 0 on pci3 Oct  1 17:17:32 gallifrey kernel: igb1: Using
> > > MSIX interrupts with 9 vectors Oct  1 17:17:32 gallifrey kernel:
> > > igb1: Ethernet address: 0c:c4:7a:ac:51:21 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: Bound queue 0 to cpu 8 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: Bound queue 1 to cpu 9 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: Bound queue 2 to cpu 10 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: Bound queue 3 to cpu 11 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: Bound queue 4 to cpu 0 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: Bound queue 5 to cpu 1 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: Bound queue 6 to cpu 2 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: Bound queue 7 to cpu 3 Oct  1 17:17:32 gallifrey
> > > kernel: igb1: netmap queues/slots: TX 8/1024, RX 8/1024 Oct  1
> > > 17:17:32 gallifrey kernel: igb0: link state changed to UP Oct  1
> > > 17:17:32 gallifrey kernel: igb1: link state changed to UP Oct  1
> > > 17:17:46 gallifrey kernel: igb1: link state changed to DOWN Oct  1
> > > 17:17:53 gallifrey kernel: igb1: link state changed to UP Oct  1
> > > 17:19:06 gallifrey kernel: igb0: promiscuous mode enabled Oct  1
> > > 17:40:09 gallifrey kernel: igb0: <Intel(R) PRO/1000 Network
> > > Connection, Version - 2.5.3-k> port 0x6020-0x603f mem
> > > 0xc7120000-0xc713ffff,0xc7144000-0xc7147fff irq 26 at device 0.0
> > > numa-domain 0 on pci3 Oct  1 17:40:09 gallifrey kernel: igb0: Using
> > > MSIX interrupts with 9 vectors Oct  1 17:40:09 gallifrey kernel:
> > > igb0: Ethernet address: 0c:c4:7a:ac:51:20 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: Bound queue 0 to cpu 0 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: Bound queue 1 to cpu 1 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: Bound queue 2 to cpu 2 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: Bound queue 3 to cpu 3 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: Bound queue 4 to cpu 4 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: Bound queue 5 to cpu 5 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: Bound queue 6 to cpu 6 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: Bound queue 7 to cpu 7 Oct  1 17:40:09 gallifrey
> > > kernel: igb0: netmap queues/slots: TX 8/1024, RX 8/1024 Oct  1
> > > 17:40:09 gallifrey kernel: igb1: <Intel(R) PRO/1000 Network
> > > Connection, Version - 2.5.3-k> port 0x6000-0x601f mem
> > > 0xc7100000-0xc711ffff,0xc7140000-0xc7143fff irq 28 at device 0.1
> > > numa-domain 0 on pci3 Oct  1 17:40:09 gallifrey kernel: igb1: Using
> > > MSIX interrupts with 9 vectors Oct  1 17:40:09 gallifrey kernel:
> > > igb1: Ethernet address: 0c:c4:7a:ac:51:21 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: Bound queue 0 to cpu 8 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: Bound queue 1 to cpu 9 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: Bound queue 2 to cpu 10 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: Bound queue 3 to cpu 11 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: Bound queue 4 to cpu 0 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: Bound queue 5 to cpu 1 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: Bound queue 6 to cpu 2 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: Bound queue 7 to cpu 3 Oct  1 17:40:09 gallifrey
> > > kernel: igb1: netmap queues/slots: TX 8/1024, RX 8/1024 Oct  1
> > > 17:40:09 gallifrey kernel: igb0: link state changed to UP Oct  1
> > > 17:40:09 gallifrey kernel: igb1: link state changed to UP Oct  1
> > > 17:41:25 gallifrey kernel: igb0: promiscuous mode enabled Oct  1
> > > 09:02:49 gallifrey kernel: igb0: link state changed to DOWN Oct  1
> > > 09:06:13 gallifrey kernel: igb0: link state changed to UP Oct  1
> > > 12:04:48 gallifrey kernel: igb0: <Intel(R) PRO/1000 Network
> > > Connection, Version - 2.5.3-k> port 0x6020-0x603f mem
> > > 0xc7120000-0xc713ffff,0xc7144000-0xc7147fff irq 26 at device 0.0
> > > numa-domain 0 on pci3 Oct  1 12:04:48 gallifrey kernel: igb0: Using
> > > MSIX interrupts with 9 vectors Oct  1 12:04:48 gallifrey kernel:
> > > igb0: Ethernet address: 0c:c4:7a:ac:51:20 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: Bound queue 0 to cpu 0 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: Bound queue 1 to cpu 1 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: Bound queue 2 to cpu 2 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: Bound queue 3 to cpu 3 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: Bound queue 4 to cpu 4 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: Bound queue 5 to cpu 5 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: Bound queue 6 to cpu 6 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: Bound queue 7 to cpu 7 Oct  1 12:04:48 gallifrey
> > > kernel: igb0: netmap queues/slots: TX 8/1024, RX 8/1024 Oct  1
> > > 12:04:48 gallifrey kernel: igb1: <Intel(R) PRO/1000 Network
> > > Connection, Version - 2.5.3-k> port 0x6000-0x601f mem
> > > 0xc7100000-0xc711ffff,0xc7140000-0xc7143fff irq 28 at device 0.1
> > > numa-domain 0 on pci3 Oct  1 12:04:48 gallifrey kernel: igb1: Using
> > > MSIX interrupts with 9 vectors Oct  1 12:04:48 gallifrey kernel:
> > > igb1: Ethernet address: 0c:c4:7a:ac:51:21 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: Bound queue 0 to cpu 8 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: Bound queue 1 to cpu 9 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: Bound queue 2 to cpu 10 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: Bound queue 3 to cpu 11 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: Bound queue 4 to cpu 0 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: Bound queue 5 to cpu 1 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: Bound queue 6 to cpu 2 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: Bound queue 7 to cpu 3 Oct  1 12:04:48 gallifrey
> > > kernel: igb1: netmap queues/slots: TX 8/1024, RX 8/1024 Oct  1
> > > 12:04:48 gallifrey kernel: igb0: link state changed to UP Oct  1
> > > 12:16:01 gallifrey kernel: igb0: link state changed to DOWN Oct  1
> > > 12:19:26 gallifrey kernel: igb0: link state changed to UP
> > > 
> > > Nothing in the auth.log that I can see as an issue.
> > > 
> > > Also, how do I turn routing / ifconfig back on?
> > > 
> > > Rebooting is not that fun
> > > 
> > > > 
> > > > 
> > > 
> > 
> > I once had this problem on a server. It wasn't an Intel nic but it was
> > constantly going up and down by itself, and the system lost its
> > connectivity.
> > 
> > I replaced the nic and the problem went away.
> > 
> As a field service tech, I've also seen this many times.
> 
> Other things to try, in case it is actual reboots and not just NIC going
> up and down, is a full fsck in single user mode, check SMART logs, 
> do a RAM test. run full disk diagnostics, eg manufacturers tests.
> 
> Any inconsistencies may be the cause of spurious reboots while
> not being serious enough to kill the system.
>

Think to problem was just inadvertantly touching the cat7 
shielded cable.

Ad the NIC is built onboard tothe MB.

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