Bind upgrade producing errors on pfsense 2.5 upgrade

freebsd-man

Hi!

Could the usage of an additional ACL cause the problem?

Debian Discussion: Bug#980786: named: after upgrade to bind9=1:9.16.11-1 named is killed with status=11/SEGV

nordeep

@freebsd-man Thanks. It's make sense.

madforic

@freebsd-man That is the issue!
In my case I disabled any named acl and bind started as expected.
Named acls make sense only for master zones. Slave and forward zones works with named acls without proplems.

matthijs

Is there maybe a way to workaround for this ACL issue ? I have two ACLs and I really need them (one is an ACL containing secondary name servers who are allowed to do zone transfers, the other is an ACL containing hosts who are allowed to do dynamic updates)

Or should I wait till this bug is fixed and a new release is provided ?

md0

I'm not sure if I have the same issue, but after upgrading to 2.5.0, named service, along with several other downloaded packages, fail to start upon reboot. A manual start of the named service clears the blockage and all the other services then proceed to start normally.

No logs whatsoever are saved on the first (automatic) start attempt. Afterwards, no error is shown, I've tried to delete my only named ACL, but the problem persists. Reinstalling the Bind package is also of no use.

Any hints on how I could debug this further would be appreciated.

matthijs

I read that this Bind bug (bug 980786) where freebsd-man is referring to is already fixed.
Can Netgate update the Bind package to the latest version?

viktor_g

try to update it directly (on x86):

# pkg add -f https://pkg.freebsd.org/FreeBSD:12:amd64/latest/All/lmdb-0.9.28,1.txz
# pkg add -f https://pkg.freebsd.org/FreeBSD:12:amd64/latest/All/bind916-9.16.12.txz

freebsd-man

@viktor_g :
With the BIND 9.16.12 package I can use an ACL without issues in a view and zones.

The LDAP package is a needed dependency for installing the bind package this way.
I think the final updated pfSense package will perhaps also have this dependency or will be a modified package without it.
So I will delete both packages before updating bind via pfSense GUI.

md0

@viktor_g
I've updated to the 9.16.12 version and my problem persists, so this is clearly not related. Maybe I should open a support ticket?

matthijs

I updated directly to bind916-9.16.12 from the command line like viktor_g suggested, and all my Bind problems are SOLVED :-) , bind starts and runs without issues now. Can Netgate update the official Package Manager with bind916-9.16.12 ?

Thanks in advance

Kr

Matthijs

nordeep

@viktor_g
Confirm. After manual update bind to 9.16.12 issue has been solved, in my case.
Thank you!

freebsd-man

After deleting the manual installed bind and lmdb packages und the old pfSense -pkg-bind package via shell, I installed the updated Package pfSense-pkg-bind-9.16_10 via GUI.

While installing I used "tail -f /var/log/resolver.log" to inspect the startup of the new bind.

I got rndc timeout messages from install log in GUI and errors from bind-startup in tail-output.
After GUI timouts the install finished successful.

After deleting corrupted journal files with "rm /cf/named/etc/namedb/*jnl" I finally was able to start bind via GUI.
Now it is up and running.

md0

@freebsd-man
In my case, upgrading the Bind package did not solve the problem. I get the same timeouts at install, but also during startup. I've deleted all the files and reinstalled the package, but it didn't make any difference.

What I've found out is that given enough time (like 15-20 minutes in my case) the named service will eventually start, but not before cycling through each of the zones trying to freeze and thaw them and getting timeouts from RNDC. There are no logs of this, but I can see the processes in memory:

/usr/local/sbin/rndc -q -c /usr/local/etc/rndc.conf freeze [zone name] IN [view name]
/usr/local/sbin/rndc -q -c /usr/local/etc/rndc.conf thaw [zone name] IN [view name]

It's definitely a problem with RNDC, but I can't figure out how to fix it, I guess I'll just have to go back to 2.4.5, since I'm apparently the only one experiencing this issue.

freebsd-man

@md0
But we can say, named is not crashing with signal 11 any more.
Your problem seems to be a config problem.
And yes, bind behaves more and more like a "diva".

My tips:
When saving something in GUI and running in timeout, it is possible to interrupt the page reload after 5 or more seconds and enter bind GUI again. So the GUI has generated the config.
Setting bind logging more verbose will also help to find the errors via "tail -f /var/log/resolver.log" in ssh shell.
If rndc shows timeouts, in most cases named does not answer.
So the timeout is caused by config problem. For example IP-port is used by other daemon or zone-loading error or journal file corrupted.
When inspecting zones I always clear the serial.
Keep your configs simple and look out for error messages at named start.
When looking for errors, it is better to stop and start the process. Using rndc is useless if named is not running!
Keep in mind: Errors will stop "named" process and warnings will not. Most errors will be show inside "resolver" logfiles.

md0

@freebsd-man
In my case named never crashed with signal 11 - it's definitely a different problem. If it's a config issue, the logs never show anything wrong - during the first (automatic) start attempt nothing gets logged and afterwards everything appears completely normal. Below is typical output:

bind.txt

Incrreasing the verboseness does not produce any additional warnings.
Any idea what else I could do to try to fix this?

md0

@md0 Quick update:

If I let the default start-up run its course, there are some errors in the log:

2021-03-03T13:13:40.212844+02:00 router named[10949] general: error: malformed transaction: 5709a41150573356.mkeys.jnl last serial 9 != transaction first serial 8
2021-03-03T13:13:40.212859+02:00 router named[10949] general: error: managed-keys-zone/[View]: keyfetch_done:dns_journal_write_transaction -> unexpected error
2021-03-03T13:13:40.212902+02:00 router named[10949] dnssec: error: managed-keys-zone/[View]: error during managed-keys processing (unexpected error): DNSSEC validation may be at risk

If I start the service manually there are no errors. In any case, Bind work correctly after starting up.

freebsd-man

@md0
Do you use the bind as local DNS only inside a LAN?
Or is it a public (authoritative) or hidden-primary DNS for your officially registered Domains?

I use it in both cases on different locations.

In my LAN it holds the internal zones while the "DNS Resolver" does the caching.
I use Bind on localhost (ports 1053 and 1953) for several master-zones and the reverse-zones.
I use one ACL with a list of local clients.
The "DNS Resolver" (unbound) has the Custom Option

server:
do-not-query-localhost: no

and some "Domain Overrides" with "Lookup Server IP Address" 127.0.0.1@1053.
DNS Resolver is listening on localhost and LAN (default ports 53 + 953) an has the outgoing interfaces localhost LAN und WAN.
If the bind on my pfSense has a problem, I can change the domain overrides with a temporary bind on my fileserver.
And the DNS Resolver caches the local zones for a while, when troubleshooting bind.
His zones are a copy of the Bind GUIs "Resulting Zone Config File" outputs.

And at my carrier-side server-housing location there is a public DNS on a pfSense for several official zones. (authoritative or hidden-primary).

Now you can find out, what your need is.
It is listening on a dedicated Interface. I use different ACLs for recursion or notify setups.

These setups helped me to keep control on my DNS locations and are running for years.
Public DNS is always dangerous when not monitored.
Private DNS with dynamic IP location has to be simple.
Bind as private caching DNS is in my opinion not the best idea.
Unbound is reliable as caching DNS and is a pfSense builtin service, but not so interesting for holding own zones.
So my best solution is to use both services side-by-side.

freebsd-man

@md0
stop your bind.
Delete corrupted journal files for example with "rm /cf/named/etc/namedb/*jnl".
Start bind.
The journal files will be rebuild on bind startup.

md0

@freebsd-man I use Bind as a public server for several domains and Unbound as a forwarder for the local network. Bind binds to a public ip address on port 53 and to 127.0.0.1 on port 8953 (control channel). Unbound uses port 53 on the LAN interface and 853 (default) on the loopback - there should are no conflicts and this setup has been stable for quite some time now.

Deleteing the jnl files has no efect. On the next reboot Bind goes through the same timeouts (and errors) as before. Starting the named service manually on the other hand generates no errors, even if I do not remove the jnl file.

One important hint may be that following an automatic start (after the usual timeouts) I end up with two named processes instead of one and, strangely, this does not appear to have any impact on Bind, I guess one of the instances is dormant, but I don't know enough about Bind's internal achitecture to make a guess about what's going on.

Gertjan

@md0 said in Bind upgrade producing errors on pfsense 2.5 upgrade:

blblabla.mkeys.jnl last serial 9 != transaction first serial 8

That is best as it gets as an explanation that says that a dynamic zone file has been edited/modified by something / someone - but not bind itself.

The theory :
If you want - or pfSense wants - to edit (change) a dynamic zone files, the "freezed - edited - reloaded - thawed" instructions should be used.

The reality :
If pfSense want to change a zone file, because a 'A' or 'SOA' needed to be changed, it applies this method. If if something breaks, and bind itself continues (also) to modify these files, the sync journal - the file with the dot jnl extension - get corrupted.

The If not :
That's the error you see.

And that's just one of the reasons that I think that the person that thinks that he can manage 'bind' with a GUI should be handled with love, compassion and respect. For the others : Just run. Now. As many have tried. Many have ....