BIND as a slave for MyDNS master

Discussion in 'General' started by MooktaKiNG, May 9, 2006.

  1. MooktaKiNG

    MooktaKiNG New Member

    I would like to setup a slave with BIND. It should do nothing other then get all the dns data from MyDNS master.

    How should i configure the slave BIND?
    (i'm gonna use chrooted bind, which is simple enough)

    This is becuase i want to install a slave without any burden, like mysql etc, just want a plain slave thats all. Also i don't want to share the same mysql database since that would defeat the purpose of having it in the first place. If master goes down so will slave.

    If there is better way (lighter way ;)) please let me know.
    Thank you.
     
  2. MooktaKiNG

    MooktaKiNG New Member

    It would be even more amazing if i could run MyDNS using sqlite :D anyway just a thought.
     
  3. falko

    falko Super Moderator ISPConfig Developer

  4. ph00dz

    ph00dz New Member

    Do I need to do anything special to the mydns server to make it transfer correctly?
     
  5. ph00dz

    ph00dz New Member

    oops... nevermind. figured it out.
     
  6. mooseman

    mooseman New Member

    Hi could you enlighten us on how you did it...

    My current situation:

    I attempted to create a "master" dns server in ISPconfig 3 using mydns and have it replicate to my ispconfig 2 bind dns. Both servers are being NATed behind respective firewalls.

    I updated the mydns.conf with the following options:

    allow-axfr = yes
    allow-update = yes
    notify-enabled = yes
    notify-source = (public NATed IP of mydns master)

    I created the zone on the master ispconfig 3 server (mydns) and created a slave zone on the ispconfig 2 (bind 9) server pointing to the master.

    The initial axfr goes through but any updates to the zone are not transferred with the following error in the log:

    I receive the following in the syslog of the ispconfig 2 bind server:

    Oct 31 10:03:30 (server) named[(PID)]: client (public.IP.of.mydns)#47075: received notify for zone '(domain).com'
    Oct 31 10:03:30 (server) named[(PID)]: zone .com/IN: Transfer started.
    Oct 31 10:03:30 (server) named[(PID)]: transfer of '(domain).com/IN' from (public.IP.of.mydns)#53: connected using (private.IP.of.bind)#35684
    Oct 31 10:03:30 (server) named[(PID)]: transfer of '(domain).com/IN' from (public.IP.of.mydns)#53: failed while receiving responses: end of file
    Oct 31 10:03:30 (server) named[(PID)]: transfer of '(domain).com/IN' from (public.IP.of.mydns)#53: end of transfer


    Is the "failed while receiving responses: end of file" occurring because of the private ip being sent?? is "notify-source = " config option of mydns supposed to fix that?

    Any help would be appreciated.

    Thanks,
     
    Last edited: Oct 31, 2009
  7. atakacs

    atakacs New Member

    Having the exact same problem:

    10-Jun-2010 13:01:10.140 general: info: zone mydomain.com/IN: Transfer started.
    10-Jun-2010 13:01:10.175 xfer-in: info: transfer of 'mydomain.com/IN' from xx.xx.203.171#53: connected using xx.xx.104.26#56315
    10-Jun-2010 13:01:10.236 xfer-in: error: transfer of 'mydomain.com/IN' from xx.xx.203.171#53: failed while receiving responses: end of file
    10-Jun-2010 13:01:10.236 xfer-in: info: transfer of 'mydomain.com/IN' from xx.xx.203.171#53: end of transfer

    Any idea / suggestion most welcome

    Regards

    alex
     
  8. falko

    falko Super Moderator ISPConfig Developer

    Can you post your mydns.conf from the master and also the output of
    Code:
    iptables -L
    from the master?
     
  9. atakacs

    atakacs New Member

    Hi

    Config file:

    Code:
    ##
    ##  /etc/mydns.conf
    ##  For more information, see mydns.conf(5).
    ##
    
    
                                	# DATABASE INFORMATION
    
    db-host = localhost         	# SQL server hostname
    db-user = mydns          	# SQL server username
    db-password = c1543f1afa050b3f819c2e96ff8a1f89      	# SQL server password
    database = mydns            	# MyDNS database name
    
    
                                	# GENERAL OPTIONS
    
    user = nobody               	# Run with the permissions of this user
    group = nobody              	# Run with the permissions of this group
    listen = *                  	# Listen on these addresses ('*' for all)
    no-listen =                 	# Do not listen on these addresses
    
    
                                	# CACHE OPTIONS
    
    zone-cache-size = 1024      	# Maximum number of elements stored in the zone cache
    zone-cache-expire = 60      	# Number of seconds after which cached zones expires
    reply-cache-size = 1024     	# Maximum number of elements stored in the reply cache
    reply-cache-expire = 30     	# Number of seconds after which cached replies expire
    
    
                                	# ESOTERICA
    
    log = LOG_DAEMON            	# Facility to use for program output (LOG_*/stdout/stderr)
    pidfile = /var/run/mydns.pid	# Path to PID file
    timeout = 120               	# Number of seconds after which queries time out
    multicpu = 1                	# Number of CPUs installed on your system
    recursive =                 	# Location of recursive resolver
    allow-axfr = no             	# Should AXFR be enabled?
    allow-tcp = yes             	# Should TCP be enabled?
    allow-update = no           	# Should DNS UPDATE be enabled?
    ignore-minimum = no         	# Ignore minimum TTL for zone?
    soa-table = soa             	# Name of table containing SOA records
    rr-table = rr               	# Name of table containing RR data
    soa-where =                 	# Extra WHERE clause for SOA queries
    rr-where =                  	# Extra WHERE clause for RR queries
    

    iptables on the master

    Code:
    # iptables -L
    Chain INPUT (policy ACCEPT)
    target     prot opt source               destination
    
    Chain FORWARD (policy ACCEPT)
    target     prot opt source               destination
    
    Chain OUTPUT (policy ACCEPT)
    target     prot opt source               destination
    
    iptables on the slave

    Code:
    iptables -L
    Chain INPUT (policy ACCEPT)
    target     prot opt source               destination
    
    Chain FORWARD (policy ACCEPT)
    target     prot opt source               destination
    
    Chain OUTPUT (policy ACCEPT)
    target     prot opt source               destination
    
    Must say nothing stands out to my untrained eyes ;)
     
  10. falko

    falko Super Moderator ISPConfig Developer

    Set allow-axfr to yes in your mydns.conf and restart MyDNS.
     
  11. atakacs

    atakacs New Member

    Thanks for your help.

    Seeing some progress

    Code:
    13-Jun-2010 21:09:28.905 general: info: zone mydomain.com/IN: Transfer started.
    13-Jun-2010 21:09:28.992 xfer-in: info: transfer of 'mydomain.com/IN' from xxx.xxx.203.171#53: connected using yyy.yyy.104.26#52285
    13-Jun-2010 21:09:29.067 general: error: zone mydomain.com/IN: has no NS records
    13-Jun-2010 21:09:29.067 xfer-in: error: transfer of 'mydomain.com/IN' from xxx.xxx.203.171#53: failed while receiving responses: bad zone
    13-Jun-2010 21:09:29.067 xfer-in: info: transfer of 'mydomain.com/IN' from xxx.xxx.203.171#53: end of transfer
    Not sure what wrong - obviously I entered NS records for mydomain.com...

    Any idea ?
     
  12. falko

    falko Super Moderator ISPConfig Developer

    Did you create NS records for mydomain.com on the master? What's the output of
    Code:
    dig @localhost NS mydomain.com
    on the master?
     
  13. atakacs

    atakacs New Member

    Hi

    Yes I believe there are NS records for the domain

    Code:
    mydomain.com.  		A  	yyy.yyy.10.175  0  	86400  	[Delete]
    mail.mydomain.com. 	A 	yyy.yyy.10.175 	0 	86400 	[Delete]
    ns.mydomain.com. 	A 	zzz.zzz.203.171 0 	86400 	[Delete]
    ns.mydomain.com. 	NS 	zzz.zzz.203.171 0 	86400 	[Delete]
    ns1.mydomain.com. 	A 	xxx.xxx.104.26 	0 	86400 	[Delete]
    ns1.mydomain.com. 	NS 	xxx.xxx.104.26 	0 	86400 	[Delete]
    www.mydomain.com. 	A 	xxx.xxx.104.26 	0 	86400 	[Delete]
    I'm using a rPath based lochDNS VM which apparently does not contain a dig command...

    Regards

    alex
     
  14. falko

    falko Super Moderator ISPConfig Developer

    An NS record should point to a hostname, not an IP address.
     
  15. atakacs

    atakacs New Member

    Hello

    many thanks for your help

    I have updated the entries as follows:

    Code:
    mydomain.com.  		A  	yyy.yyy.10.175  0  	86400  	[Delete]
    mail.mydomain.com. 	A 	yyy.yyy.10.175 	0 	86400 	[Delete]
    ns.mydomain.com. 	A 	zzz.zzz.203.171 0 	86400 	[Delete]
    ns.mydomain.com. 	NS 	ns.mydomain.com. 0 	86400 	[Delete]
    ns1.mydomain.com. 	A 	xxx.xxx.104.26 	0 	86400 	[Delete]
    ns1.mydomain.com. 	NS 	ns1.mydomain.com. 0 	86400 	[Delete]
    www.mydomain.com. 	A 	xxx.xxx.104.26 	0 	86400 	[Delete]
    no apparent change (the slave BIND server reports no NS records).

    Any further suggestion ?!
     
  16. falko

    falko Super Moderator ISPConfig Developer

    What does
    Code:
    dig @localhost ns mydomain.com
    show on the BIND server?
     
  17. atakacs

    atakacs New Member

    Hi again

    Code:
    ; <<>> DiG 9.4.2-P2.1 <<>> @localhost ns mydomain.com
    ; (1 server found)
    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 49585
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
    
    ;; QUESTION SECTION:
    ;mydomain.com.			IN	NS
    
    ;; Query time: 6 msec
    ;; SERVER: 127.0.0.1#53(127.0.0.1)
    ;; WHEN: Mon Jun 21 15:03:46 2010
    ;; MSG SIZE  rcvd: 29
     
  18. falko

    falko Super Moderator ISPConfig Developer

    I've just realized that your NS records are as follows:
    Code:
    [COLOR="Red"]ns.[/COLOR]mydomain.com. 	NS 	ns.mydomain.com. 0 	86400 	[Delete]
    [COLOR="Red"]ns1.[/COLOR]mydomain.com. 	NS 	ns1.mydomain.com. 0 	86400 	[Delete]
    but they should be like this:
    Code:
    mydomain.com. 	NS 	ns.mydomain.com. 0 	86400 	[Delete]
    mydomain.com. 	NS 	ns1.mydomain.com. 0 	86400 	[Delete]
     
  19. atakacs

    atakacs New Member

    Thanks - good catch !

    Geting closer but still not working...

    Now I see this:

    Code:
    24-Jun-2010 00:11:25.785 general: info: zone mydomain.com/IN: Transfer started.
    24-Jun-2010 00:11:25.818 xfer-in: info: transfer of 'mydomain.com/IN' from xxx.xxx.203.171#53: connected using 88.191.104.26#49301
    24-Jun-2010 00:11:25.880 general: error: dumping master file: tmp-WvNAfyMNBz: open: permission denied
    24-Jun-2010 00:11:25.880 xfer-in: error: transfer of 'mydomain.com/IN' from xxx.xxx.203.171#53: failed while receiving responses: permission denied
    24-Jun-2010 00:11:25.880 xfer-in: info: transfer of 'mydomain.com/IN' from xxx.xxx.203.171#53: end of transfer
    thanks for you patience !

    Regards

    alex
     
  20. falko

    falko Super Moderator ISPConfig Developer

    Do you see any errors in the logs on the master?
     

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