knot-dns-users Prosinec 2018

knot-dns-users@lists.nic.cz

4 participants
3 discussions

knot group in a FreeBSD jail -- Permission Denied to Knotc and Python API

by Rick van Rein

Hi, I'm working on a registry for +31 ENUM, using Knot DNS 2.6.8. The intention is to trigger the Python API from PostgreSQL database views. The postgres user, though added to the knot group and granted rw- on all of /var/db/knot/* and the knotd socket, cannot do thinkgs like conf-read through the Python API or knotc. This is where root and the postgres user diverge: 84630 knotc CALL open(0x7fffffffe100,0x100022<O_RDWR|O_EXLOCK|O_CLOEXEC>) 84630 knotc NAMI "/tmp/SEMDMDBrXFzK!_#un)" 84630 knotc RET open 6 84630 knotc CALL fstat(0x6,0x7fffffffe068) 84630 knotc STRU struct stat {dev=4261341516, ino=125942, mode=0100660, nlink=1, uid=0, gid=0, rdev=4294967295, atime=1545172776.416579000, mtime=1545182138.348328000, ctime=1545182138.348328000, birthtime=1545172776.416478000, size=16, blksize=4096, blocks=2, flags=0x800 } That's root. uid=0 and gid=0 for the /tmp/SENDMDB... file. But now: 84649 knotc CALL open(0x7fffffffe0f0,0x100022<O_RDWR|O_EXLOCK|O_CLOEXEC>) 84649 knotc NAMI "/tmp/SEMDMDBrXFzK!_#un)" 84649 knotc RET open -1 errno 13 Permission denied That's user postgres, even though it is in the knot group. It seems to see the file but have no access, probably due to uid=0, gid=0. Note that matching name. --> What is this file it is trying to open, and is it always mapped to uid=0,gid=0, even if the user running "knotc conf-read" is not root? Could this be a FreeBSD things, or a jail thing? Any advise is welcome! Thanks! -Rick

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Re: [knot-dns-users] knot group in a FreeBSD jail -- Permission Denied to Knotc and Python API

by Daniel Salzman

I don't think the Makefile is wrong. If you call knotc with an explicit control socket specification, no configuration file is loaded because it's not needed. So there is an issue with the configuration access. But I don't understand why knotd is not affected? You could also test using configuration database. Daniel On 12/21/18 2:44 PM, Rick van Rein wrote: > Hi Daniel, > >> I guess it relates to a temporary confdb, which is created for storing configuration loaded from >> a config file and removed upon. Could you try calling knotc with explicit socket parameter (knotc -s ...)? > > Yes, that solved it. > > The default socket path is @run_dir@/knot.sock, and the ports tree > configures --with-rundir=/var/run/knot but, according to > https://github.com/freebsd/freebsd-ports/blob/master/dns/knot2/Makefile#L32… > it is under defined variables. I will ask Leo if this might need > correction. > > Thanks! > -Rick >

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Question on KSK rollover

by Volker Janzen

Hi all, one of my zones made a ZSK rollover yesterday. I had an some recursive resolvers validation errors at different times. This is the log output from knot of the rollover: Dec 6 17:16:48 a knotd[9924]: info: [voja.de.] DNSSEC, signing zone Dec 6 17:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, ZSK rollover started Dec 6 17:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 53800, algorithm RSASHA256, KSK, public, ready, active Dec 6 17:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 15820, algorithm RSASHA256, public Dec 6 17:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 38188, algorithm RSASHA256, public, active Dec 6 17:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, signing started Dec 6 17:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, successfully signed Dec 6 17:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, next signing at 2018-12-06T18:16:49 Dec 6 17:16:49 a knotd[9924]: info: [voja.de.] zone file updated, serial 1543943808 -> 1544113009 Dec 6 17:16:50 a knotd[9924]: info: [voja.de.] notify, outgoing, 10.10.10.10@53: serial 1544113009 Dec 6 17:16:50 a knotd[9924]: info: [voja.de.] IXFR, outgoing, 10.10.10.10@45727: started, serial 1543943808 -> 1544113009 Dec 6 17:16:50 a knotd[9924]: info: [voja.de.] IXFR, outgoing, 10.10.10.10@45727: finished, 0.00 seconds, 1 messages, 1329 bytes Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, signing zone Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 53800, algorithm RSASHA256, KSK, public, ready, active Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 38188, algorithm RSASHA256, public Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 15820, algorithm RSASHA256, public, active Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, signing started Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, successfully signed Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, next signing at 2018-12-06T19:16:49 Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] zone file updated, serial 1544113009 -> 1544116609 Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] notify, outgoing, 10.10.10.10@53: serial 1544116609 Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] IXFR, outgoing, 10.10.10.10@53131: started, serial 1544113009 -> 1544116609 Dec 6 18:16:49 a knotd[9924]: info: [voja.de.] IXFR, outgoing, 10.10.10.10@53131: finished, 0.00 seconds, 1 messages, 43889 bytes Dec 6 18:16:50 a knotd[9924]: info: [voja.de.] AXFR, outgoing, 10.10.10.10@59417: started, serial 1544116609 Dec 6 18:16:50 a knotd[9924]: info: [voja.de.] AXFR, outgoing, 10.10.10.10@59417: finished, 0.00 seconds, 1 messages, 28054 bytes Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, signing zone Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 53800, algorithm RSASHA256, KSK, public, ready, active Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 15820, algorithm RSASHA256, public, active Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, signing started Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, successfully signed Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] DNSSEC, next signing at 2018-12-07T15:16:48 Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] zone file updated, serial 1544116609 -> 1544120209 Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] notify, outgoing, 10.10.10.10@53: serial 1544120209 Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] IXFR, outgoing, 10.10.10.10@55161: started, serial 1544116609 -> 1544120209 Dec 6 19:16:49 a knotd[9924]: info: [voja.de.] IXFR, outgoing, 10.10.10.10@55161: finished, 0.00 seconds, 1 messages, 1329 bytes 10.10.10.10 is the (anonymized) IP of the distribution server, which is a Bind server. The actual authorative nameservers get the zone from Bind with IFXR or AXFR. AXFR is used for distribution to a anycast nameserver pair. When looking at the ZSK rollover timing, I notice that after two hours Knot stopped signing with the old ZSK. Does this make sense? The last event before the rollover has been this resining: Dec 4 18:16:48 a knotd[9924]: info: [voja.de.] DNSSEC, signing zone Dec 4 18:16:48 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 53800, algorithm RSASHA256, KSK, public, ready, active Dec 4 18:16:48 a knotd[9924]: info: [voja.de.] DNSSEC, key, tag 38188, algorithm RSASHA256, public, active Dec 4 18:16:48 a knotd[9924]: info: [voja.de.] DNSSEC, signing started Dec 4 18:16:48 a knotd[9924]: info: [voja.de.] DNSSEC, successfully signed Dec 4 18:16:48 a knotd[9924]: info: [voja.de.] DNSSEC, next signing at 2018-12-06T17:16:48 Is it possible that this is an issue with a propagation-delay that is too low (default value applies). Regards Volker

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knot-dns-users Prosinec 2018