The kicker was probably this line:
Sep 6 15:44:40 ns3 audit: <audit-1400> { write } for pid=15447 comm="named"
name="named.secroots" dev="dm-0" ino=135707451
scontext=system_u:system_r:named_t:s0 tcontext=unconfined_u:object_r:etc_t:s0
tclass=file permissive=0
The SELinux context that BIND runs in on a red hat system doesn't have access
to write to a file of etc_t. After moving the file to /var/named somewhere, a
restorecon should have reset it to something like var_named_t or
var_named_cache_t which it would have had access to write to.
>From the line, 'permissive=0' so it suggests a SELinux-enforcing environment.
Stuart
From: bind-users [mailto:[email protected]] On Behalf Of Brent
Swingle
Sent: Friday, 7 September 2018 12:05 PM
To: [email protected]
Subject: Re: [BIND] RE: KSK Rollover
This matter has been resolved with input from Evan. I was able to add a file
path for secroots to the named.conf file and push the output file to a temp
directory that was not permission restricted.
secroots-file "/tmp/named.secroots" ;
Ultimately when I ran "rndc secroots" it created the output file here:
/tmp/systemd-private-b2ebff459df9471e8bf444e2d2b1116e-named.service-HX1NF5/tmp/named.secroots
The data in the file seems to be as desired if I understand the KSK Rollover
test correctly, I should see 20326 which pertains to the new key:
[root@ns3 tmp]# cat named.secroots
06-Sep-2018 18:47:16.190
Start view internal-in
./RSASHA256/20326 ; managed
./RSASHA256/19036 ; managed
dlv.isc.org/RSASHA1/19297 ; managed
Start view external-in
./RSASHA256/20326 ; managed
./RSASHA256/19036 ; managed
dlv.isc.org/RSASHA1/19297 ; managed
Start view external-chaos
dumpsecroots failed: not found
I did not fully try Carl's input below but I believe it would have worked as
well. I had performed a "chmod 770 /var/named" but I did not follow it up with
the SELinux modification. The last error I had was SELinux barking so I'd
anticipate his suggestion was the correct one.
Does the 'named' user have write access to /var/named? The default
redhat setup has /var/named as 0750, with /var/named/data as 0770. Also,
the default redhat selinux config prevents named writing to /var/named.
chmod 770 /var/named
setsebool -P named_write_master_zones=true
rndc secroots
Thanks everyone for assisting with this matter.
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