2.3 Lockup with no packages

cmb · Apr 26, 2016, 6:12 PM

That 10.10.1.177 indeed looks to be compromised, or possibly running a vulnerability assessment tool but that list seems to match known malware. Something on that machine is scanning looking for common vulnerable pages.

SoloIT · Apr 26, 2016, 6:21 PM

Thanks I am looking into that client. It's used by a part time person, so it explains why I've not seen it before.

Good news, the patch is still holding up. No crashes. I'm planning to roll the patch to the other firewalls tonight.

This weekend I'll also change back to my other hardware platform for the one odd location using the igb NIC rather than then em that most of my firewalls use.

SoloIT · Apr 27, 2016, 11:21 AM

I did update all my other firewall's with the patch yesterday evening.
This morning, the first test box I had installed the patch on encountered the same watchdog error:


Apr 27 01:24:22 bhamfirewall kernel: em2: Watchdog timeout -- resetting
Apr 27 01:24:22 bhamfirewall kernel: em2: link state changed to DOWN
Apr 27 01:24:22 bhamfirewall check_reload_status: Linkup starting em2
Apr 27 01:24:23 bhamfirewall php-fpm[13740]: /rc.linkup: Hotplug event detected for LAN(lan) static IP (10.10.1.1 )
Apr 27 01:24:25 bhamfirewall kernel: em2: link state changed to UP
Apr 27 01:24:25 bhamfirewall check_reload_status: Linkup starting em2
Apr 27 01:24:26 bhamfirewall php-fpm[13740]: /rc.linkup: Hotplug event detected for LAN(lan) static IP (10.10.1.1 )
Apr 27 01:24:26 bhamfirewall check_reload_status: rc.newwanip starting em2
Apr 27 01:24:27 bhamfirewall php-fpm[13740]: /rc.newwanip: rc.newwanip: Info: starting on em2.
Apr 27 01:24:27 bhamfirewall php-fpm[13740]: /rc.newwanip: rc.newwanip: on (IP address: 10.10.1.1) (interface: LAN[lan]) (real interface: em2).
Apr 27 01:24:27 bhamfirewall check_reload_status: Reloading filter
Apr 27 01:24:28 bhamfirewall xinetd[11505]: Starting reconfiguration
Apr 27 01:24:28 bhamfirewall xinetd[11505]: Swapping defaults
Apr 27 01:24:28 bhamfirewall xinetd[11505]: readjusting service 6969-udp
Apr 27 01:24:28 bhamfirewall xinetd[11505]: Reconfigured: new=0 old=1 dropped=0 (services)
Apr 27 01:25:46 bhamfirewall kernel: em2: Watchdog timeout -- resetting
Apr 27 01:25:46 bhamfirewall kernel: em2: link state changed to DOWN
Apr 27 01:25:46 bhamfirewall check_reload_status: Linkup starting em2
Apr 27 01:25:47 bhamfirewall php-fpm[13740]: /rc.linkup: Hotplug event detected for LAN(lan) static IP (10.10.1.1 )
Apr 27 01:25:49 bhamfirewall check_reload_status: Linkup starting em2
Apr 27 01:25:49 bhamfirewall kernel: em2: link state changed to UP
Apr 27 01:25:50 bhamfirewall php-fpm[13740]: /rc.linkup: Hotplug event detected for LAN(lan) static IP (10.10.1.1 )
Apr 27 01:25:50 bhamfirewall check_reload_status: rc.newwanip starting em2
Apr 27 01:25:51 bhamfirewall php-fpm[13740]: /rc.newwanip: rc.newwanip: Info: starting on em2.
Apr 27 01:25:51 bhamfirewall php-fpm[13740]: /rc.newwanip: rc.newwanip: on (IP address: 10.10.1.1) (interface: LAN[lan]) (real interface: em2).
Apr 27 01:25:51 bhamfirewall check_reload_status: Reloading filter
Apr 27 01:25:52 bhamfirewall xinetd[11505]: Starting reconfiguration
Apr 27 01:25:52 bhamfirewall xinetd[11505]: Swapping defaults
Apr 27 01:25:52 bhamfirewall xinetd[11505]: readjusting service 6969-udp
Apr 27 01:25:52 bhamfirewall xinetd[11505]: Reconfigured: new=0 old=1 dropped=0 (services)

Above is the system.log from when it started. There is nothing before. Once it starts, this set of error messages just keeps repeating until I reset the firewall. Since it was the LAN port acting up, I could still ping the firewall from the WAN and establish an OpenVPN connection. Also, my IPSec tunnels remained running.

I was really hoping the patch fixed it the problem as it was running for over a day and typically locked up before then. Suggestions are appreciated.

mer · Apr 27, 2016, 11:31 AM

Anything happening at about that timeframe, backups, remote transfer of lots of data? One of the other users of the modified kernel reported a problem after awhile, during a transfer of large amount of data.

In all the other cases of you having an issue, was the WAN side still alive but the LAN side dead//stuck

SoloIT · Apr 27, 2016, 11:37 AM

Yes, a lot of data was being moved as a back to a remote site was in progress.

In the other cases, the port that locks up is random. I've had both LAN and WAN lock up. I don't see any pattern to which port locks.

mer · Apr 27, 2016, 11:44 AM

It may be a good datapoint for cmb, I'd suggest maybe getting the status and emailing it or a link as he asked another to do here. That'll give 2 datapoints.

https://forum.pfsense.org/index.php?topic=110716.msg617252#msg617252

SoloIT · Apr 27, 2016, 11:50 AM

I have emailed cmb the status file.

SoloIT · Apr 27, 2016, 2:47 PM

We've locked up 2 more times this morning under fairly heavy IPSec VPN load.

SoloIT · Apr 27, 2016, 8:37 PM

Had another lockup with something new in the system log. Among the Watchdog timeout: kernel: sonewconn: pcb 0xfffff80016aaa960: Listen queue overflow: 193 already in queue awaiting acceptance (1 occurrences)


Apr 27 13:08:21 wttlfirewall check_reload_status: Linkup starting em2
Apr 27 13:08:22 wttlfirewall check_reload_status: Linkup starting em2
Apr 27 13:08:22 wttlfirewall kernel: em2: link state changed to UP
Apr 27 13:09:04 wttlfirewall kernel: em2: Watchdog timeout -- resetting
Apr 27 13:09:04 wttlfirewall kernel: em2: link state changed to DOWN
Apr 27 13:09:04 wttlfirewall check_reload_status: Linkup starting em2
Apr 27 13:09:05 wttlfirewall check_reload_status: Could not connect to /var/run/php-fpm.socket
Apr 27 13:09:05 wttlfirewall kernel: sonewconn: pcb 0xfffff80016aaa960: Listen queue overflow: 193 already in queue awaiting acceptance (1 occurrences)
Apr 27 13:09:05 wttlfirewall check_reload_status: Linkup starting em2
Apr 27 13:09:05 wttlfirewall kernel: em2: link state changed to UP
Apr 27 13:09:06 wttlfirewall check_reload_status: Could not connect to /var/run/php-fpm.socket

Not sure if that helps identify the issue or not

mer · Apr 28, 2016, 11:17 AM

Well, it could be related, or maybe not. What that error message is saying is something is trying to create a connection, but the application handling those connections is backed up. It could be new connections are coming in faster than the app can handle or the app is not processing the connection (maybe something else running).

Links to a couple of old threads that have good info:
https://forums.freebsd.org/threads/43712/
https://lists.freebsd.org/pipermail/freebsd-stable/2013-August/074561.html

afreaken · Apr 29, 2016, 2:22 PM

Having the same issues as described in this thread. Using 2x pfSense Netgate SG-2440 systems. Both updated to 2.3, both experienced the lockup issue.

They are using the igb nic's, 1 LAN, 1 WAN with an IPsec VPN between both locations.

Last lockup happened at ~4am this morning which should not have much traffic at that time.

System ran fairly well prior to upgrading from 2.2.6 - 2.3. Hopefully a fix is available soon, otherwise I'm going to have to revert back to 2.2.6.

mer · Apr 29, 2016, 3:18 PM

@afreaken:

Having the same issues as described in this thread. Using 2x pfSense Netgate SG-2440 systems. Both updated to 2.3, both experienced the lockup issue.

They are using the igb nic's, 1 LAN, 1 WAN with an IPsec VPN between both locations.

Last lockup happened at ~4am this morning which should not have much traffic at that time.

System ran fairly well prior to upgrading from 2.2.6 - 2.3. Hopefully a fix is available soon, otherwise I'm going to have to revert back to 2.2.6.

Interesting. I think most/all folks having the same (or what appears to be the same) issue are all doing something with IPsec and em or igb interfaces

SoloIT · Apr 29, 2016, 3:22 PM

I've started rolling all mine back to 2.2.6. Though I assume the team is working on the issue, I've heard nothing from them in 2 days. I've asked for a status update.

afreaken · Apr 29, 2016, 3:43 PM

@SoloIT:

I've started rolling all mine back to 2.2.6. Though I assume the team is working on the issue, I've heard nothing from them in 2 days. I've asked for a status update.

know a safe source for 2.2.6? Don't think I downloaded it, just did the auto upgrade. Last version I have is 2.2.3, and I would rather get the last stable release (from a safe source).

SoloIT · Apr 29, 2016, 3:45 PM

You can get them direct from pfSense: http://files.pfsense.org/mirror/downloads/old/

afreaken · Apr 29, 2016, 3:46 PM

@SoloIT:

You can get them direct from pfSense: http://files.pfsense.org/mirror/downloads/old/

Oh nice, thanks. Wish my searches lead me there in the first place…

pnp · Apr 29, 2016, 5:38 PM

I considered opening a new topic as I am not sure my problem has the same causes, but finally decided to post here based on the same similarities noticed:

had the same "Listen queue overflow" error
using intel drivers (igb)
using ipsec
having high CPU usage

The one thing I did not had yet was a complete lockup. Packet forwarding and routing kept working, but squid and squidguard weren't (the only two packages I have installed), or better they were running but failed to deliver the webpages almost always.

If it was wrong posting here, please tell me and I'll start a new thread.

My setup is a redundant 2 pfsense boxes with 2 WAN and 2 LAN with the following hardware:
SuperMicro SYS-5018A-FTN4 with
1x AOC-SGP-I4 (Standard 4-port GbE with Intel i350)
2x SO-4GB-1600E (4GB 1600MHz DDR3, ECC, SO DIMM)
2x Kingston SSD 60GB (GEOM mirror)

Both were running 2.2.6 until about a couple of weeks ago. I upgraded the secondary to 2.3 and disabled carp on the master.

After 2 or 3 days, I received complaints from the users that they were not able to browse the internet.
I logged in the web configurator and saw the following in system.log:

sonewconn: pcb 0xfffff8010cd72dc8: Listen queue overflow: 193 already in queue awaiting acceptance (97 occurrences)

At the time I switched to the master and rebooted the secondary. Then proceeded to do a complete xml backup without the packages, a clean install of 2.3, and a config restore.

I then again switched carp off on the primary, and kept monitoring the secondary for problems. Yesterday, after 8 days without any problem I was about to upgrade the primary to 2.3. Fortunately I hadn't the time to get it done, because today I again noticed problems with browsing the internet.

Logging in the pfsense web page took a while, and this time I did not see any problem reported in system.log. Its probably worth mentioning that after the reinstall I had added

kern.ipc.soacceptqueue = 1024

to system tunables.

Running top I saw a load average of 5+, when the usual is <1.

Noticed some ipsec tunnels were down (maybe 10~20). I have about 70 ipsec configured.

I enabled carp on the primary, but this time I did not reboot the secondary. I have spent the last hours trying to find out what is wrong. The following is information from now, about 8+ hours of the time I noticed the problem and switched traffic to the other machine:

top:

last pid: 28265;  load averages:  5.08,  5.05,  5.01             up 9+06:59:06  17:53:33
68 processes:  1 running, 67 sleeping
CPU 0:  0.0% user,  0.0% nice,  0.0% system,  0.7% interrupt, 99.3% idle
CPU 1:  0.0% user,  0.0% nice,  0.0% system,  100% interrupt,  0.0% idle
CPU 2:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
CPU 3:  0.0% user,  0.0% nice,  100% system,  0.0% interrupt,  100% idle
CPU 4:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
CPU 5:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
CPU 6:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
CPU 7:  0.4% user,  0.0% nice,  0.0% system,  0.0% interrupt, 99.6% idle
Mem: 21M Active, 561M Inact, 653M Wired, 698M Buf, 6634M Free
Swap: 16G Total, 16G Free

  PID USERNAME  THR PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAND
38979 root        1  20    0 21856K  3084K CPU7    7   0:14   0.20% top
94760 root        1  20    0 14516K  2320K select  5  50:33   0.00% syslogd
18106 root        1  20    0 16676K  2276K bpf     0  25:57   0.00% filterlog
 6928 clamav      2  20    0   412M   346M select  3   0:44   0.00% clamd
15398 root        1  20    0 46196K  8528K kqread  3   0:37   0.00% nginx
15275 root        1  20    0 46196K  8592K kqread  0   0:31   0.00% nginx
84115 root        1  52   20 17000K  2596K wait    6   0:10   0.00% sh
66757 unbound     8  20    0   123M 32388K kqread  2   0:07   0.00% unbound
83556 dhcpd       1  20    0 24804K 13648K select  2   0:06   0.00% dhcpd
46922 root        5  20    0 15012K  2292K accept  0   0:03   0.00% dpinger
60772 squid       1  20    0 37752K  4092K select  3   0:03   0.00% pinger
65339 squid       1  20    0 37752K  4092K select  5   0:03   0.00% pinger
48881 root        5  20    0 15012K  2292K accept  3   0:03   0.00% dpinger
96574 squid       1  20    0 37752K  4092K select  3   0:03   0.00% pinger
48364 root        5  20    0 19108K  2376K accept  7   0:03   0.00% dpinger
59818 root        2  20    0 30144K 17988K kqread  0   0:03   0.00% ntpd
47149 root        5  20    0 15012K  2292K accept  0   0:03   0.00% dpinger
49585 root        5  20    0 19108K  2372K accept  7   0:02   0.00% dpinger
49171 root        5  20    0 19108K  2372K accept  4   0:02   0.00% dpinger
47717 root        5  20    0 19108K  2372K accept  0   0:02   0.00% dpinger
48172 root        5  20    0 19108K  2372K accept  6   0:02   0.00% dpinger
94771 squid       1  20    0   199M 51996K kqread  0   0:02   0.00% squid
72924 root        1  20    0 82268K  7512K select  5   0:02   0.00% sshd
71417 root        1  20    0 21616K  5496K select  5   0:01   0.00% openvpn
47670 root        1  20    0 21616K  5596K select  6   0:01   0.00% openvpn
70996 root        1  23    0 12268K  1884K nanslp  0   0:01   0.00% minicron
31269 root        1  20    0 16532K  2260K nanslp  0   0:01   0.00% cron
 1111 clamav      1  20    0 25268K  2864K select  0   0:01   0.00% c-icap
74415 root        1  20    0   262M 26728K kqread  6   0:01   0.00% php-fpm
 1648 clamav     12  20    0 26708K  3192K semwai  3   0:00   0.00% c-icap
 1381 clamav     12  21    0 26708K  3192K select  4   0:00   0.00% c-icap
40729 root        1  52    0   266M 43300K accept  2   0:00   0.00% php-fpm
  289 root        1  20    0 13624K  4840K select  0   0:00   0.00% devd
62093 root        1  25    0 17000K  2528K wait    5   0:00   0.00% sh
69439 root        1  47    0 12268K  1888K nanslp  4   0:00   0.00% minicron
58909 root       17  20    0   253M 14680K uwait   3   0:00   0.00% charon
  275 root        1  40   20 18888K  2504K kqread  3   0:00   0.00% check_reload_status
20054 root        1  20    0 18896K  2404K select  7   0:00   0.00% xinetd
59970 squid       1  28    0 33564K 11700K sbwait  7   0:00   0.00% squidGuard
59969 squid       1  28    0 33564K 11700K sbwait  0   0:00   0.00% squidGuard
60434 squid       1  29    0 33564K 11700K sbwait  2   0:00   0.00% squidGuard
59396 squid       1  25    0 33564K 11700K sbwait  0   0:00   0.00% squidGuard
60174 squid       1  26    0 33564K 11700K sbwait  5   0:00   0.00% squidGuard
59604 squid       1  27    0 33564K 11700K sbwait  4   0:00   0.00% squidGuard
59176 squid       1  27    0 33564K 11700K sbwait  6   0:00   0.00% squidGuard
59769 squid       1  27    0 33564K 11700K sbwait  6   0:00   0.00% squidGuard

vmstat -i

interrupt                          total       rate
irq23: ehci0                     1605871          2
cpu0:timer                     904539001       1126
irq257: igb0:que 0               6571130          8
irq258: igb0:que 1               5848552          7
irq259: igb0:que 2               5582121          6
irq260: igb0:que 3               5203123          6
irq261: igb0:que 4               5512906          6
irq262: igb0:que 5               7177261          8
irq263: igb0:que 6               6540870          8
irq264: igb0:que 7               5954809          7
irq265: igb0:link                     12          0
irq266: igb1:que 0             180504559        224
irq267: igb1:que 1             155556613        193
irq268: igb1:que 2             135560934        168
irq269: igb1:que 3             134799683        167
irq270: igb1:que 4             169856947        211
irq271: igb1:que 5             114559553        142
irq272: igb1:que 6             108745891        135
irq273: igb1:que 7             175595604        218
irq274: igb1:link                      4          0
irq293: igb4:que 0              19205978         23
irq294: igb4:que 1              14175553         17
irq295: igb4:que 2              13186026         16
irq296: igb4:que 3              13357795         16
irq297: igb4:que 4              14144730         17
irq298: igb4:que 5              15867243         19
irq299: igb4:que 6              16196010         20
irq300: igb4:que 7              14305323         17
irq301: igb4:link                      4          0
irq302: igb5:que 0             122160662        152
irq303: igb5:que 1             148252972        184
irq304: igb5:que 2             136667917        170
irq305: igb5:que 3             139662860        173
irq306: igb5:que 4             148586814        185
irq307: igb5:que 5             201532284        251
irq308: igb5:que 6             101346091        126
irq309: igb5:que 7             158692479        197
irq310: igb5:link                      6          0
irq328: igb7:link                      2          0
irq330: ahci1                    3126604          3
cpu5:timer                      71360664         88
cpu6:timer                      21788299         27
cpu2:timer                      24476506         30
cpu7:timer                      28427574         35
cpu3:timer                      22974538         28
cpu1:timer                     115989008        144
cpu4:timer                      27194256         33
Total                         3722393642       4636

from pfsense Diagnostics / System Activity

last pid: 57816;  load averages:  5.04,  5.03,  5.00  up 9+07:02:44    17:57:11
375 processes: 14 running, 265 sleeping, 96 waiting

Mem: 21M Active, 558M Inact, 654M Wired, 698M Buf, 6636M Free
Swap: 16G Total, 16G Free

  PID USERNAME PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAND
   11 root     155 ki31     0K   128K CPU3    3 219.5H 100.00% [idle{idle: cpu3}]
   11 root     155 ki31     0K   128K RUN     5 219.4H 100.00% [idle{idle: cpu5}]
   11 root     155 ki31     0K   128K CPU6    6 219.4H 100.00% [idle{idle: cpu6}]
   11 root     155 ki31     0K   128K CPU2    2 219.1H 100.00% [idle{idle: cpu2}]
   11 root     155 ki31     0K   128K CPU4    4 219.1H 100.00% [idle{idle: cpu4}]
   11 root     155 ki31     0K   128K CPU0    0 217.7H 100.00% [idle{idle: cpu0}]
   12 root     -92    -     0K  1600K CPU1    1  35:20 100.00% [intr{irq303: igb5:que}]
   11 root     155 ki31     0K   128K CPU7    7 219.2H  99.46% [idle{idle: cpu7}]
64580 root      28    0   266M 36836K piperd  6   0:03   2.78% php-fpm: pool nginx (php-fpm)
   11 root     155 ki31     0K   128K RUN     1 197.0H   0.00% [idle{idle: cpu1}]
   12 root     -60    -     0K  1600K WAIT    0  86:48   0.00% [intr{swi4: clock}]
   12 root     -92    -     0K  1600K RUN     1  73:15   0.00% [intr{irq267: igb1:que}]
   12 root     -92    -     0K  1600K WAIT    2  70:13   0.00% [intr{irq268: igb1:que}]
   12 root     -92    -     0K  1600K WAIT    4  69:13   0.00% [intr{irq270: igb1:que}]
   12 root     -92    -     0K  1600K WAIT    7  62:36   0.00% [intr{irq273: igb1:que}]
   12 root     -92    -     0K  1600K WAIT    6  50:53   0.00% [intr{irq272: igb1:que}]
94760 root      20    0 14516K  2320K select  2  50:34   0.00% /usr/sbin/syslogd -s -c -c -l /var/dhcpd/v
   12 root     -92    -     0K  1600K WAIT    0  48:35   0.00% [intr{irq266: igb1:que}]

ifconfig


igb5: flags=8943 <up,broadcast,running,promisc,simplex,multicast>metric 0 mtu 1500
	options=400b8 <vlan_mtu,vlan_hwtagging,jumbo_mtu,vlan_hwcsum,vlan_hwtso>ether 0c:c4:7a:--:--:--
	inet6 fe80::ec4:7aff:fe68:c925%igb5 prefixlen 64 tentative scopeid 0x6 
	inet 172.17.23.242 netmask 0xffffff00 broadcast 172.17.23.255 
	inet 172.17.23.254 netmask 0xffffff00 broadcast 172.17.23.255 vhid 2 
	nd6 options=29 <performnud,ifdisabled,auto_linklocal>media: Ethernet autoselect (100baseTX <full-duplex>)
	status: active
	carp: BACKUP vhid 2 advbase 1 advskew 100</full-duplex></performnud,ifdisabled,auto_linklocal></vlan_mtu,vlan_hwtagging,jumbo_mtu,vlan_hwcsum,vlan_hwtso></up,broadcast,running,promisc,simplex,multicast>

I think what I am seeing is related to a problem with igb5 and irq303 placing CPU1 under 100% interrupt load. What I don't know is why, and if it is something with the gib drivers or with freebsd.

I stopped and started all the services this box is running, and removed the cable from the lan port in question, but that CPU1 100% interrupt load continues.

I also think that this problem could go further back, but maybe it was not that evident. In 2.2.6 I had to reboot pfsense every 5 days or so to get ipsec back running. It would start being unable to connect one of the tunnels, then a few hours/day another, and so on. Usually when I noticed this there was about 3 to 6 tunnels down, and restarting the ipsec service didn't solved it.
I saw reports of this in the forum, but no solution.

Googling I found https://lists.freebsd.org/pipermail/freebsd-stable/2014-June/079005.html which is very similar, but not sure it is the same problem.

I haven't rebooted the secondary yet, so I can run more tests if needed, but I have little knowledge of freebsd.

Any thoughts or suggestions anyone ?

SoloIT · Apr 29, 2016, 5:49 PM

Are you seeing the port go down in the system.log file? My guess is the issues are related. I cannot say in every case my hardware is totally locked. Many of mine are in remote sites, and I don't have anyone I trust to do more than reboot once traffic is not flowing. I've had too many crashes with the firewall that I'm physically with and reverted it back to 2.2.6 a few days ago.

2.3 seems to down the port under IPSec load. Load in this case is does not seem to be the capacity of the hardware of by of the connections coming into the box. For example, I have the same hardware at multiple sites. 1 had 20 Mb WAN and other has 3 Mb WAN. However, after running about 45-60 minutes at >75% of the WAN capacity, the pfSense will typically malfunction.

pnp · Apr 29, 2016, 6:03 PM

Information in system.log starts about 6 hours ago, which is after the problem.
I believe it keeps working because I have traffic forwarded to a few internal servers, and I don't have a report of it failing.

adam65535 · Apr 29, 2016, 7:08 PM

It definitely sounds like the same symptoms that I had at a backup site when I upgraded the secondary from 2.1.5 to 2.3. Once the problem occurred the Interrupt assigned to an igb queue stayed high on the secondary 2.3 even when very little traffic was going through the secondary. No signs of problems in the logs. I did NOT have the "Listen queue overflow" error in the logs. I had failed back to the primary when the initial problem occurred so very little traffic was going to the secondary. When that single interrupt that is assigned to an igb queue got into the 100% cpu state it seemed like whatever traffic would be diverted to that IRQ is lost and not seen by the firewall (not even tcpdump sees it). With a 4 core system and 2 queues per interface (i had hw.igb.num_queues set to 2) I was probably losing about 1/2 of the traffic to the firewall (just a guess). Some traffic was still flowing which I assume is the traffic sent to the other igb queues on the other processors. Traffic on the other interfaces seemed to be working from what I could tell.

One ipsec tunnel on the secondary was working to our main headquarters but another ipsec tunnel to the primary site was down because it couldn't recieve packets form the primary site IP. It was just random IPs that the firewall couldn't communicate with which I am sure was because the traffic was getting directed to the igb interrupt taking 100% cpu. The other queues were working for the other igb interrupts on the same interface it seems like what was happening.

Unfortunately (or fortunately) it only happened once so far. That was 3.5 days ago which was about 10 hours after switching carp to the secondary server and disabling it on the old 2.1.5 primary server.

Not using pfblocker here btw. Ipsec to 2 sites, openvpn for administration(not used during the problem), IP Aliases (about 7) on a carp IP, and built in load balancer (about 17 pools). Only installed packages are nmap and openvp-client-export. I did have bash installed from a 2.1.5 manual pkg install which is still on the systems. Snort was running on 2.1.5 and still in the config but it was uninstalled prior to 2.3 upgrade and never installed on 2.3.

One ipsec tunnel was working to our main headquarters but another ipsec tunnel to the primary site was down because it couldn't recieve packets form the primary site IP. It was just random IPs that the firewall couldn't communicate with which I am sure was because the traffic was getting directed to the igb interrupt taking 100% cpu. The other queues were working for the other igb interrupts on the same interface.

Again… I still don't know if this is because of the hw.igb.num_queues setting that I had in place.