[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-22 Thread Launchpad Bug Tracker
This bug was fixed in the package krb5 - 1.15-1ubuntu0.1

---
krb5 (1.15-1ubuntu0.1) zesty; urgency=medium

  * Pulled in Debian fixes from Sam Hartman for:
- kinit fails for OTP user when using kdc discovery via DNS
  (LP: #1683237)
- KDC/kadmind explicit wildcard listener addresses do not use pktinfo
  (LP: #1688121)
- KDC/kadmind may fail to start on IPv4-only systems (LP: #1688310)

 -- Andreas Hasenack   Fri, 05 May 2017 14:05:38
+

** Changed in: krb5 (Ubuntu Zesty)
   Status: Fix Committed => Fix Released

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-15 Thread LocutusOfBorg
** Tags added: verification-done

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Title:
  KDC/kadmind may fail to start on IPv4-only systems

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-15 Thread Andreas Hasenack
Reproducing the problem with 1.15-1:
ubuntu@15-89:~$ apt-cache policy krb5-kdc
krb5-kdc:
  Installed: 1.15-1
  Candidate: 1.15-1
  Version table:
 *** 1.15-1 500
500 http://br.archive.ubuntu.com/ubuntu zesty/universe amd64 Packages
100 /var/lib/dpkg/status

After rebooting with no IPv6 support, the kerberos services are not running:
ubuntu@15-89:~$ ps faxw|grep -E "(krb5kdc|kadmind)"|grep -v grep
ubuntu@15-89:~$

And we have the expected failure in auth.log:
ubuntu@15-89:~$ sudo grep -E "(kadmind|krb5kdc).*Failed" /var/log/auth.log
May 15 13:23:40 15-89 kadmind[1195]: Failed setting up a UDP socket (for ::.464)
May 15 13:23:40 15-89 krb5kdc[1196]: Failed setting up a UDP socket (for ::.750)
May 15 13:24:34 15-89 sudo:   ubuntu : TTY=pts/0 ; PWD=/home/ubuntu ; USER=root 
; COMMAND=/bin/grep -E (kadmind|krb5kdc).*Failed /var/log/auth.log


Now we install the fixed packages from proposed:
ubuntu@15-89:~$ apt-cache policy krb5-kdc
krb5-kdc:
  Installed: 1.15-1ubuntu0.1
  Candidate: 1.15-1ubuntu0.1
  Version table:
 *** 1.15-1ubuntu0.1 500
500 http://br.archive.ubuntu.com/ubuntu zesty-proposed/universe amd64 
Packages
100 /var/lib/dpkg/status
 1.15-1 500
500 http://br.archive.ubuntu.com/ubuntu zesty/universe amd64 Packages

Immediately after that the services are running already:
ubuntu@15-89:~$ ps faxw|grep -E "(krb5kdc|kadmind)"|grep -v grep
 2377 ?Ss 0:00 /usr/sbin/krb5kdc -P /var/run/krb5-kdc.pid
 2443 ?Ss 0:00 /usr/sbin/kadmind -nofork


We still have errors in auth.log, but they are not fatal:
May 15 13:26:49 15-89 kadmind[2443]: Address family not supported by protocol - 
Cannot create TCP server socket on ::.464
May 15 13:26:49 15-89 kadmind[2443]: Failed setting up a UDP socket (for ::.464)

And we are bound to IPv4 sockets only as expected:
ubuntu@15-89:~$ sudo netstat -anp|grep -E "^(tcp|udp).*(krb5kdc|kadmind)"
tcp0  0 0.0.0.0:88  0.0.0.0:*   LISTEN  
2377/krb5kdc
tcp0  0 0.0.0.0:749 0.0.0.0:*   LISTEN  
2443/kadmind
tcp0  0 0.0.0.0:464 0.0.0.0:*   LISTEN  
2443/kadmind
udp0  0 0.0.0.0:88  0.0.0.0:*   
2377/krb5kdc
udp0  0 0.0.0.0:464 0.0.0.0:*   
2443/kadmind
udp0  0 0.0.0.0:750 0.0.0.0:*   
2377/krb5kdc   


** Tags removed: verification-needed
** Tags added: verification-done-zesty

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-15 Thread Andreas Hasenack
Reproducing the problem with 1.15-1:
ubuntu@15-89:~$ apt-cache policy krb5-kdc
krb5-kdc:
  Installed: 1.15-1
  Candidate: 1.15-1
  Version table:
 *** 1.15-1 500
500 http://br.archive.ubuntu.com/ubuntu zesty/universe amd64 Packages
100 /var/lib/dpkg/status

After rebooting with no IPv6 support, the kerberos services are not running:
ubuntu@15-89:~$ ps faxw|grep -E "(krb5kdc|kadmind)"|grep -v grep
ubuntu@15-89:~$

And we have the expected failure in auth.log:
ubuntu@15-89:~$ sudo grep -E "(kadmind|krb5kdc).*Failed" /var/log/auth.log
May 15 13:23:40 15-89 kadmind[1195]: Failed setting up a UDP socket (for ::.464)
May 15 13:23:40 15-89 krb5kdc[1196]: Failed setting up a UDP socket (for ::.750)
May 15 13:24:34 15-89 sudo:   ubuntu : TTY=pts/0 ; PWD=/home/ubuntu ; USER=root 
; COMMAND=/bin/grep -E (kadmind|krb5kdc).*Failed /var/log/auth.log


Now we install the fixed packages from proposed:
ubuntu@15-89:~$ apt-cache policy krb5-kdc
krb5-kdc:
  Installed: 1.15-1ubuntu0.1
  Candidate: 1.15-1ubuntu0.1
  Version table:
 *** 1.15-1ubuntu0.1 500
500 http://br.archive.ubuntu.com/ubuntu zesty-proposed/universe amd64 
Packages
100 /var/lib/dpkg/status
 1.15-1 500
500 http://br.archive.ubuntu.com/ubuntu zesty/universe amd64 Packages

Immediately after that the services are running already:
ubuntu@15-89:~$ ps faxw|grep -E "(krb5kdc|kadmind)"|grep -v grep
 2377 ?Ss 0:00 /usr/sbin/krb5kdc -P /var/run/krb5-kdc.pid
 2443 ?Ss 0:00 /usr/sbin/kadmind -nofork


We still have errors in auth.log, but they are not fatal:
May 15 13:26:49 15-89 kadmind[2443]: Address family not supported by protocol - 
Cannot create TCP server socket on ::.464
May 15 13:26:49 15-89 kadmind[2443]: Failed setting up a UDP socket (for ::.464)

And we are bound to IPv4 sockets only as expected:
ubuntu@15-89:~$ sudo netstat -anp|grep -E "^(tcp|udp).*(krb5kdc|kadmind)"
tcp0  0 0.0.0.0:88  0.0.0.0:*   LISTEN  
2377/krb5kdc
tcp0  0 0.0.0.0:749 0.0.0.0:*   LISTEN  
2443/kadmind
tcp0  0 0.0.0.0:464 0.0.0.0:*   LISTEN  
2443/kadmind
udp0  0 0.0.0.0:88  0.0.0.0:*   
2377/krb5kdc
udp0  0 0.0.0.0:464 0.0.0.0:*   
2443/kadmind
udp0  0 0.0.0.0:750 0.0.0.0:*   
2377/krb5kdc   


** Tags removed: verification-needed
** Tags added: verification-done-zesty

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  KDC/kadmind may fail to start on IPv4-only systems

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-13 Thread LocutusOfBorg
Andreas can you please test it?
thanks

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-11 Thread Adam Conrad
Hello Andreas, or anyone else affected,

Accepted krb5 into zesty-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/krb5/1.15-1ubuntu0.1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: krb5 (Ubuntu Zesty)
   Status: In Progress => Fix Committed

** Tags added: verification-needed

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-07 Thread Mathew Hodson
** Changed in: krb5 (Ubuntu)
   Importance: Undecided => High

** Changed in: krb5 (Ubuntu Zesty)
   Importance: Undecided => High

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-05 Thread Andreas Hasenack
** Description changed:

  This is fixed in artful in krb5 1.15-2
  
  - upstream: http://krbdev.mit.edu/rt/Ticket/Display.html?id=8531
  - debian: conflated into 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860767
  - debian patch: 0011-Fix-KDC-kadmind-startup-on-some-IPv4-only-systems.patch
  
- getaddrinfo() called on a wildcard address might return the IPv6 "::1"
- address. On machines without IPv6 support, binding to it will likely
- fail and the kdc/kadmin services won't start.
+ 
+ [Impact]
+ getaddrinfo() called on a wildcard address might return the IPv6 "::1" 
address. On machines without IPv6 support, binding to it will most likely fail 
and the kdc/kadmin services won't start.
+ 
+ The provided patch is applied upstream and in Debian testing.
+ 
+ 
+ [Test Case]
  
  Steps to reproduce the problem on zesty:
  
  a) install krb5-kdc krb5-admin-server
  $ sudo apt install krb5-kdc krb5-admin-server
  when prompted, use EXAMPLE.ORG (all caps) as the default realm
  when prompted, use the IP of this machine for the KDC and the Admin servers
  
  b) configure a new realm called EXAMPLE.ORG
  $ sudo krb5_newrealm
  use any password of your liking when prompted
  
  c) confirm the kdc and admin services are running.
  $ ps faxw|grep -E "(krb5kdc|kadmind)"|grep -v grep
-  4275 ?Ss 0:00 /usr/sbin/krb5kdc -P /var/run/krb5-kdc.pid
-  4306 ?Ss 0:00 /usr/sbin/kadmind -nofork
+  4275 ?Ss 0:00 /usr/sbin/krb5kdc -P /var/run/krb5-kdc.pid
+  4306 ?Ss 0:00 /usr/sbin/kadmind -nofork
  
  d) create a principal and obtain a ticket to confirm kerberos is working 
properly:
  $ sudo kadmin.local addprinc -pw ubuntu +requires_preauth ubuntu
  $ kinit
- Password for ubu...@example.org: 
+ Password for ubu...@example.org:
  $ klist
  Ticket cache: FILE:/tmp/krb5cc_1000
  Default principal: ubu...@example.org
  
  Valid starting   Expires  Service principal
  05/04/2017 14:20:17  05/05/2017 00:20:17  krbtgt/example@example.org
-   renew until 05/05/2017 14:20:13
+  renew until 05/05/2017 14:20:13
  
  e) Confirm the kerberos services are bound to IPv6 local sockets:
  $ sudo netstat -anp|grep -E "^(tcp|udp)6.*(krb5kdc|kadmind)"
- tcp6   0  0 :::88   :::*LISTEN
  1078/krb5kdc
- tcp6   0  0 :::749  :::*LISTEN
  1065/kadmind
- tcp6   0  0 :::464  :::*LISTEN
  1065/kadmind
- udp6   0  0 :::88   :::*  
  1078/krb5kdc
- udp6   0  0 :::464  :::*  
  1065/kadmind
- udp6   0  0 :::750  :::*  
  1078/krb5kdc
+ tcp6   0  0 :::88   :::*LISTEN
  1078/krb5kdc
+ tcp6   0  0 :::749  :::*LISTEN
  1065/kadmind
+ tcp6   0  0 :::464  :::*LISTEN
  1065/kadmind
+ udp6   0  0 :::88   :::*  
  1078/krb5kdc
+ udp6   0  0 :::464  :::*  
  1065/kadmind
+ udp6   0  0 :::750  :::*  
  1078/krb5kdc
  
  f) configure the system to not support IPv6. There are probably many ways to 
do this, but the one sure way is to reboot it with ipv6.disable=1 in the kernel 
command line:
  e.1) edit /etc/default/grub
  e.2) add "ipv6.disable=1" to GRUB_CMDLINE_LINUX and save
  e.3) run sudo update-grub
  e.4) reboot
  
  f) Confirm the kdc and admin services are NOT running:
  $ ps faxw|grep -E "(krb5kdc|kadmind)"|grep -v grep
  $
  
  g) /var/log/auth.log will contain the reason:
- $ sudo grep -E "(kadmind|krb5kdc).*Failed" /var/log/auth.log 
+ $ sudo grep -E "(kadmind|krb5kdc).*Failed" /var/log/auth.log
  May  4 14:11:54 22-96 krb5kdc[1087]: Failed setting up a UDP socket (for 
::.750)
  May  4 14:11:54 22-96 kadmind[1085]: Failed setting up a UDP socket (for 
::.464)
  May  4 14:15:36 22-96 krb5kdc[1510]: Failed setting up a UDP socket (for 
::.750)
  May  4 14:16:36 22-96 krb5kdc[1652]: Failed setting up a UDP socket (for 
::.750)
  May  4 14:25:54 22-96 kadmind[1085]: Failed setting up a UDP socket (for 
::.464)
  May  4 14:25:54 22-96 krb5kdc[1079]: Failed setting up a UDP socket (for 
::.750)
+ 
+ 
+ With the updated packages, krb5-kdc and krb5-admin-server will startup just 
fine in the same conditions.
+ 
+ 
+ [Regression Potential]
+ We now tolerate a EAFNOSUPPORT error as long as at least one socket was bound 
to correctly. Maybe there could be a scenario when this one bound socket is 
useless, or unexpected: in that case, bailing out because of the EAFNOSUPPORT 
error could be seen as a more robust approach because it's immediately visible, 

[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-05 Thread Andreas Hasenack
** Description changed:

  This is fixed in artful in krb5 1.15-2
  
  - upstream: http://krbdev.mit.edu/rt/Ticket/Display.html?id=8531
  - debian: conflated into 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860767
  - debian patch: 0011-Fix-KDC-kadmind-startup-on-some-IPv4-only-systems.patch
  
- getaddrinfo() called on a wildcard address might return the IPv6 "::1"
- address. On machines without IPv6 support, binding to it will likely
- fail and the kdc/kadmin services won't start.
+ 
+ [Impact]
+ getaddrinfo() called on a wildcard address might return the IPv6 "::1" 
address. On machines without IPv6 support, binding to it will most likely fail 
and the kdc/kadmin services won't start.
+ 
+ The provided patch is applied upstream and in Debian testing.
+ 
+ 
+ [Test Case]
  
  Steps to reproduce the problem on zesty:
  
  a) install krb5-kdc krb5-admin-server
  $ sudo apt install krb5-kdc krb5-admin-server
  when prompted, use EXAMPLE.ORG (all caps) as the default realm
  when prompted, use the IP of this machine for the KDC and the Admin servers
  
  b) configure a new realm called EXAMPLE.ORG
  $ sudo krb5_newrealm
  use any password of your liking when prompted
  
  c) confirm the kdc and admin services are running.
  $ ps faxw|grep -E "(krb5kdc|kadmind)"|grep -v grep
-  4275 ?Ss 0:00 /usr/sbin/krb5kdc -P /var/run/krb5-kdc.pid
-  4306 ?Ss 0:00 /usr/sbin/kadmind -nofork
+  4275 ?Ss 0:00 /usr/sbin/krb5kdc -P /var/run/krb5-kdc.pid
+  4306 ?Ss 0:00 /usr/sbin/kadmind -nofork
  
  d) create a principal and obtain a ticket to confirm kerberos is working 
properly:
  $ sudo kadmin.local addprinc -pw ubuntu +requires_preauth ubuntu
  $ kinit
- Password for ubu...@example.org: 
+ Password for ubu...@example.org:
  $ klist
  Ticket cache: FILE:/tmp/krb5cc_1000
  Default principal: ubu...@example.org
  
  Valid starting   Expires  Service principal
  05/04/2017 14:20:17  05/05/2017 00:20:17  krbtgt/example@example.org
-   renew until 05/05/2017 14:20:13
+  renew until 05/05/2017 14:20:13
  
  e) Confirm the kerberos services are bound to IPv6 local sockets:
  $ sudo netstat -anp|grep -E "^(tcp|udp)6.*(krb5kdc|kadmind)"
- tcp6   0  0 :::88   :::*LISTEN
  1078/krb5kdc
- tcp6   0  0 :::749  :::*LISTEN
  1065/kadmind
- tcp6   0  0 :::464  :::*LISTEN
  1065/kadmind
- udp6   0  0 :::88   :::*  
  1078/krb5kdc
- udp6   0  0 :::464  :::*  
  1065/kadmind
- udp6   0  0 :::750  :::*  
  1078/krb5kdc
+ tcp6   0  0 :::88   :::*LISTEN
  1078/krb5kdc
+ tcp6   0  0 :::749  :::*LISTEN
  1065/kadmind
+ tcp6   0  0 :::464  :::*LISTEN
  1065/kadmind
+ udp6   0  0 :::88   :::*  
  1078/krb5kdc
+ udp6   0  0 :::464  :::*  
  1065/kadmind
+ udp6   0  0 :::750  :::*  
  1078/krb5kdc
  
  f) configure the system to not support IPv6. There are probably many ways to 
do this, but the one sure way is to reboot it with ipv6.disable=1 in the kernel 
command line:
  e.1) edit /etc/default/grub
  e.2) add "ipv6.disable=1" to GRUB_CMDLINE_LINUX and save
  e.3) run sudo update-grub
  e.4) reboot
  
  f) Confirm the kdc and admin services are NOT running:
  $ ps faxw|grep -E "(krb5kdc|kadmind)"|grep -v grep
  $
  
  g) /var/log/auth.log will contain the reason:
- $ sudo grep -E "(kadmind|krb5kdc).*Failed" /var/log/auth.log 
+ $ sudo grep -E "(kadmind|krb5kdc).*Failed" /var/log/auth.log
  May  4 14:11:54 22-96 krb5kdc[1087]: Failed setting up a UDP socket (for 
::.750)
  May  4 14:11:54 22-96 kadmind[1085]: Failed setting up a UDP socket (for 
::.464)
  May  4 14:15:36 22-96 krb5kdc[1510]: Failed setting up a UDP socket (for 
::.750)
  May  4 14:16:36 22-96 krb5kdc[1652]: Failed setting up a UDP socket (for 
::.750)
  May  4 14:25:54 22-96 kadmind[1085]: Failed setting up a UDP socket (for 
::.464)
  May  4 14:25:54 22-96 krb5kdc[1079]: Failed setting up a UDP socket (for 
::.750)
+ 
+ 
+ With the updated packages, krb5-kdc and krb5-admin-server will startup just 
fine in the same conditions.
+ 
+ 
+ [Regression Potential]
+ We now tolerate a EAFNOSUPPORT error as long as at least one socket was bound 
to correctly. Maybe there could be a scenario when this one bound socket is 
useless, or unexpected: in that case, bailing out because of the EAFNOSUPPORT 
error could be seen as a more robust approach because it's immediately visible, 

[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-05 Thread Launchpad Bug Tracker
** Merge proposal linked:
   
https://code.launchpad.net/~ahasenack/ubuntu/+source/krb5/+git/krb5/+merge/323686

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-04 Thread Bug Watch Updater
** Changed in: krb5 (Debian)
   Status: Unknown => Fix Released

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-04 Thread Andreas Hasenack
** Bug watch added: Debian Bug tracker #860767
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860767

** Also affects: krb5 (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860767
   Importance: Unknown
   Status: Unknown

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-04 Thread Andreas Hasenack
** Bug watch added: Debian Bug tracker #860767
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860767

** Also affects: krb5 (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860767
   Importance: Unknown
   Status: Unknown

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https://bugs.launchpad.net/bugs/1688310

Title:
  KDC/kadmind may fail to start on IPv4-only systems

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-04 Thread Andreas Hasenack
** Changed in: krb5 (Ubuntu)
 Assignee: Andreas Hasenack (ahasenack) => (unassigned)

** Changed in: krb5 (Ubuntu)
   Status: In Progress => Fix Released

** Changed in: krb5 (Ubuntu Zesty)
   Status: New => In Progress

** Changed in: krb5 (Ubuntu Zesty)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

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https://bugs.launchpad.net/bugs/1688310

Title:
  KDC/kadmind may fail to start on IPv4-only systems

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-04 Thread Andreas Hasenack
** Changed in: krb5 (Ubuntu)
 Assignee: Andreas Hasenack (ahasenack) => (unassigned)

** Changed in: krb5 (Ubuntu)
   Status: In Progress => Fix Released

** Changed in: krb5 (Ubuntu Zesty)
   Status: New => In Progress

** Changed in: krb5 (Ubuntu Zesty)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

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https://bugs.launchpad.net/bugs/1688310

Title:
  KDC/kadmind may fail to start on IPv4-only systems

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[Bug 1688310] Re: KDC/kadmind may fail to start on IPv4-only systems

2017-05-04 Thread LocutusOfBorg
** Also affects: krb5 (Ubuntu Zesty)
   Importance: Undecided
   Status: New

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Title:
  KDC/kadmind may fail to start on IPv4-only systems

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