Ubuntu Servers :: Bind9 Views - Reverse Lookup Zone Doesn't Work ?
Apr 1, 2011
I'm at a loss to why my reverse lookup zone doesn't work for me.I've got two views. One internal and one external. My domain is isp2.datornatverk.se. Public IP: 130.240.133.81.
dig -x @8.8.8.8 130.240.133.81
gives me:
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 2917
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
I've set it up so that the internal subnets gets the domains resolved to the internal IP-addresses. When querying from external addresses I will get public IP.My named.conf.local file:
Code:
acl internals {
127.0.0.0/8;[code]..........
I don't know whether the views has messed something up. It worked before I added the views.
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Oct 12, 2009
I am using RHEL5. These are my config files:
Code:
options {
listen-on port 53 { 127.0.0.1; 192.168.14.54; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";
[code]....
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Oct 23, 2009
I have the following bind9 configuration, and I'm trying to resolve reverse lookup IP address to name.
$ttl 38400
mydomain.org.INSOAmyhosting.com. (
1243281304
10800
[code]...
** server can't find 1.2.3.4.in-addr.arpa: NXDOMAIN
Is my PTR wrong, or what do I need to have the reverse lookup working ?
Note: I replace real IP by 1.2.3.4, same for my domain name.
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Jun 3, 2011
I've configured my dhcp server to update dynamically the DNS zones of BIND9 name server. Everything works ok, except for reverse nslookup:
nslookup 10.141.50.3
Server:127.0.0.1
Address:127.0.0.1#53
[code]....
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Apr 1, 2010
I'm having this problem that's driving me nuts.Basically I've set up 2 virtual DNS servers.1. Master on fictive domain "domain.xx". 2.ster of fictive domain "sub.domain.xx"NS 1 delegated sub. zone-space to the DNS 2.Everything works except for reverse lookup on sub-domain.For instance. 172.16.0.101 should resolve to my fictive mail.sub.domain.xxIf I try to resolve it with 'host 172.16.0.101' from domain.xx I get:Host 101.0.16.172.in-addr.arpa not found: 2(SERVFAIL)If I do the same from the actual sub.domain.xx I get:Host 101.0.16.172.in-addr.arpa. not found: 3(NXDOMAIN).
If I, on the other hand, try to resolve a hostname both from domain.xx or sub.domain.xx with 'host mail.sub.domain.xx' I get the proper address as the answer: 172.16.0.101I've delegated the in-addr.arpa space to sub.domain.xx dns-server according to RFC 2317 specification, at least I think...Please note this is a virtual network address 172.16.0.0/24Here are the excerpts of the in-arpa-files on both domain.xx and the sub.domain.xx server.
Code:
$TTL 12h
$ORIGIN 0.16.172.IN-ADDR.ARPA.
[code]...
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Aug 11, 2010
I am trying to get bind 9 up and running on a new installation of server 10.04 and keep getting errors when starting the daemon -
* /etc/bind/named.conf.local:19: unknown option 'zone'
* /etc/bind/named.conf.local:20: unknown option 'zone'
* /etc/bind/named.conf.default-zones:3: unknown option 'zone'
* /etc/bind/named.conf.default-zones:11: unknown option 'zone'
* /etc/bind/named.conf.default-zones:16: unknown option 'zone'
* /etc/bind/named.conf.default-zones:21: unknown option 'zone'
* /etc/bind/named.conf.default-zones:26: unknown option 'zone'
The onlything I could find after scrubbing the internet is once ina while there's a missing bracket. But I have checked and triple checked my config files and the syntax and can't find anything wrong. I have another installation of bind9 running on Fedora and the same exact syntax works just fine.
[Code]....
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Apr 6, 2010
Like many others I'm running into some reverse lookup issues with SSH. Setup is as follows:
localnet setup
myserver - 192.168.0.x
myworkstation - 192.168.0.y
[Code].....
nslookup tests show that my reverse lookup is functioning correctly. However, if I use "myworkstation" to connect to myserver.mydomain.com using an external nameserver SSH says: "Address 84.162.xx.yy maps to myserver.mydomain.com, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!"
On myserver the /etc/hosts has the internal address for the server which seems the normal way to go to me. Changing this to the servers external address solves the issue.
Apparently a connection originating from myworkstation arrives from/with my external address, and when its reverse is checked by the server it apparently finds its own internal address for that name in /etc/hosts before doing a nameserver query and thus concludes that internaladdress <> externaladdress which gives the error.
Is there any way to have the server check external DNS before /etc/hosts? Another solution would probably be running an internal DNS, so myworkstation doesn't connect through the 'outside'.
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Jan 12, 2011
The scenario: We have an external server that runs HTTP/DB servers for out shop system. Then, there's our local, in-house infrastructure that runs a.. yeah... Exchange 2010. The shop system on the external server needs to send mails to customers (order confirmations, invoices, etc.). seing as sending them directly through the local MTA (Postfix) would cause mail delivery problems because of reverse DNS issues, i've set the Postfix MTA to act as a satellite to our in-house Exchange Server, so the Exchange sends the mail instead, giving recipient mail servers a valid reverse DNS lookup.
Now, mails sent by the (proprietary, uneditable) shop system are relayed correctly and sent to the target e-mail address. My problem is: Mails not sent by the shop system, but by our own PHP scripts which run on that same external servers, are NOT relayed properly. So the Exchange is fine with the mails sent by the shop system, but not the mails sent by our scripts. This is what i get in the mail.log: The successfully relayed mail sent by the shop system:
[Code]....
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Apr 23, 2009
I have this annoying problem since day one.I am testing out Red Hat RHEL5, everything is fine except DNS look up.If I ping www.google.com, it doesn't work, ping ip address it all works;if I bring up browser, put www.google.com it doesn't work, can't find the name, however, simply put ip address there it works.My DNS seeting seems ok, and the DNS works from Windows box.
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Dec 20, 2010
i am trying to setup a minimal bind9 dns on RHEL5.in /var/named/chroot/var/named/etc i have following files,after installing bind and caching-nameserver:
localdomain.zone
localhost.zone
named.broadcast
[code]....
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Sep 27, 2009
Reverse dns lookup in C?
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Sep 20, 2010
The thing is, I've created a new local zone here (called "local.lan"), and, aparently, it is working fine, and DHCP3-SERVER is updating DNS info through the controls.But sometimes I get some strange answers from the server, like when I do the "arp" command in one of the clients, and get the server's hostname "mixed" with it's own reverse, like this: "dns.local.lan.2.168. | ether | 00:02:1e:f5:61:74 | C | eth0". Other thing is that sometimes my DNS don't update when a computer "enters" the lan. In the /var/log/syslog the DHCPOFFER appears, but the information about the DNS update isn't there.So, I would like to show you my named.conf file and my local zone db file, and get some feedback from you (what would you change... what is wrong...).
# ------------------- #
* named.conf:
# ------------------- #
[code]....
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Apr 13, 2010
I have a dynamic-dns setup that updates from DHCP. In my reverse zone file, I have some mappings that are more or less static (as in, outside of the DHCP range that updates to dhcp-<ipaddr>.domain.tld)
When I add new records to this zone and then reload the zone file (making sure to update the serial number), the name server still does not serve these new records. For example, I might add the following to my 168.192.in-addr.arpa. zone under the $ORIGIN 25.168.192.in-addr.arpa. section:
Code:
45 IN PTR new-host.example.tld.
I then proceed to try:
Code:
rndc reload
/etc/init.d/bind9 reload
[Code]....
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Oct 4, 2009
I have a file consisting of unique IP addresses - one per line I want to find the name of the host for each address. I tried the following:
Quote:
nslookup < file_name
This worked except it gives me a lot of extraneous information such as the servers providing the answers. This is too much information for me and would simply like each line of IP numbers to be replaced with a domain name. I tried using the same strategy using host and hostname and dig but I must have given the wrong command as I had no results.
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Jun 3, 2011
I've got 2 domains:
[URL]
This is how I've configured my resolv.conf file:
[URL]
When I run the host command, it can resolve machines in one.domain.com using both hostname and ipaddress. But when I run the host command for machines in two.domain.com, it only works for hostnames but not ip addresses. The result for ip addresses is:
Host 100.3.2.1.in-addr.arpa not found: 3(NXDOMAIN)
Why doesn't it try the 2nd nameserver in the resolv.conf file when resolving by ip adddress? Reverse pointers are configured for each machine in their respective domain dns servers. O/S is Oracle VM Server 2.2.1 (similar to Red Hat). Kernel is 2.6.18-128.2.1.4.37.el5xen.
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Apr 11, 2011
I have googled for hours and can not find an answer to what this means.
dig @172.16.255.254 twitter.com.
; <<>> DiG 9.7.0-P1 <<>> @172.16.255.254 twitter.com.
; (1 server found)
;; global options: +cmd
;; Got answer:
[Code]...
And I have a very long debuging log file I will not post unless requested. I also have added a ufw allow from all to all rule for testing purposes only.
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Feb 24, 2011
how to configure reverse zone for x.x.x.x/18 subnet ,all the example on the internet are for /24 or /16 subnets?
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Mar 8, 2011
I've run into a strange issue with a DHCP/DDNS setup whereby when the DHCP server asks the DNS server to add a new host, the forward map is added correctly but the reverse map has the subdomain added twice (e.g. 192.168.25.192.168.25.250)I'm running ISC DHCPd version 3.0.1 and BIND version 9.2.3 on SuSE 9.2 - 32bit.Here is my dhcpd.conf file:
# dhcpd.conf
authoritative;
include "/etc/named.keys";
[code]....
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Oct 19, 2010
I install a Bind 9 with chroot in Centos 5, but the issue is the Reverse Name Resolution Zone File didn't create by default like other zone files, so i look into /var/named directory i don't find the reverse name resolution zone file even if i add this zone on named.conf
zone "1.168.192.in-addr.arpa" IN {
type master;
file "1.168.192.testsip.com.zone";
allow-update { key "rndckey"; };
notify yes;
};
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Apr 26, 2010
I got this message on Friday from just one domain. uote:mailsrv.forthnet.gr #<mailsrv.forthnet.gr #5.5.0 smtp; 554 5.5.0 Your message was considered to be spam by the FORTHnet Antispamming Policy and was not delivered to the recipient. The following spam tests returned positive for this message:FORGED_RCVD_HELO,RCVD_IN_BRBL. For further information visitWe are not a spamming community but it seems we have a statice IP address that has a Reverse lookup to "myipaddress.static.lyse.net" and not my email domain. Would setting a cname mail.mydomain.no -> myipaddress.static.lyse.net cure this problem or are there more tricks to be performedOnce I have cured the FORGED_RCVD_HELO I can move to getting the IP removed from BARACUDA.
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Sep 6, 2010
Im install bind9 in ubentu 10 with this turotial [url]my dns server is work in linux but my client user cannot use dns when client run nslookup in cmd Cannot find server name for address my_ip_linux :server faild Server: Unknown. im on linux valid ip
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Apr 20, 2010
I want to make BIND9 aware of my TLD so I need to give it an A record. Then I wanted to create CNAME for ftp, mail and so on as time permits
I have webmin so I need to work from that.
my TLD is [URL]
I wanted to bolt on www, ftp for now
www is port 80, ftp port 21 etc
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Oct 6, 2010
when i started bind9, it showed me this error, Can anyone help me in this, according to me i dont have a file sysklogd so i can not restart that. that is why i think iam getting error while starting bind9. How to get that file and how to get started Bind9.
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Jan 3, 2011
using Ubuntu Server 10.10 x86_64 on this machine. It is used as a master DNS server for my domain. We have migrated it to Ubuntu from Gentoo. The problem is that AppArmor is spamming /var/log/syslog
Code:
Jan 3 14:38:40 hydra kernel: [2154828.893409] type=1400 audit(1294061920.141:660146): apparmor="DENIED" operation="mknod" parent=1 profile="/usr/sbin/named" name="/var/log/named_querylog" pid=15397 comm="named" requested_mask="c" denied_mask="c" fsuid=103 ouid=103
The zone files reside in /etc/bind/ and we have not changed anything in /etc/apparmor.d/usr.sbin.named .
We don't want to just uninstall apparmor, but how do we adjust its settings correctly?
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Mar 2, 2011
Since I have not gotten anything on the "General Help" I am posting this here: When a Ubuntu 10.10 I have starts up apache2, MySQL and postfix start properly but bind9 doesn't. Once booted is I run 'sudo /etc/init.d/bind9 start' it starts. The only thing odd on this system is I have a "inet6 v4tunnel" interface defined in my /etc/network/interfaces. From booting in the syslog there is:
Code:
/var/log/syslog:Feb 28 19:02:42 ubuntu named[1029]: starting BIND 9.7.1-P2 -u bind -d 9
/var/log/syslog:Feb 28 19:02:42 ubuntu named[1029]: built with '--prefix=/usr' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--sysconfdir=/etc/bind'
[code]....
Even with the bind debug level at set at 90 I do not get any more in the logs that what I posted before. The lack of errors in the logs is giving me no idea where to start. I commented out the IPv6 tunnel interface and rebooted and still no help. bind still is not starting at boot. OK, it is not a permissions issue, I have changed the config and zone files to be owned by bind:bind, root:bind, root:root and bind:root and it has made no difference. Doing a fresh install on a Virtual Box VM and configure it in a similar manner bind9 starts normally. (I am almost to the point where I will rebuild the box)
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Jan 24, 2010
Why would this iptables cause this mail delivery error? I think it's to do with dns lookups not being routed properly... if remove the last rule, mail works fine.
ssh is also very slow to connect when the last rule is enabled.
postfix mail error:
Code:
Jan 24 11:32:18 xxxx postfix/smtp[15065]: 9F2162C519: to=<xxxxx@hotmail.com>, relay=none, delay=1005, delays=965/0.01/40/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=hotmail.com type=MX: Host not found, try again) iptables
[Code]....
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Feb 8, 2011
I am trying to use a ZTE AC2726 USB EVDO Modem on openSuSE Linux 11.3 Gnome to connect to the internet. I have edited the /etc/wvdial.conf file as follows:
[Dialer Defaults]
Modem = /dev/ttyUSB0
Baud = 57600
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = .....
When I execute the wvdial command on the terminal the following error appears
joey-suse:~ # wvdial
--> WvDial: Internet dialer version 1.60
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK .....
The /etc/resolv.conf file has the DNS addresses as below
nameserver 212.49.70.22
nameserver 212.49.70.23
How do I resolve this and connect to the internet?
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Apr 26, 2010
I am migrating my server from Kloxo (lxadmin) to Ubuntu (webmin/virtualmin), and I already had my Nameservers on my register (Godaddy) to go to [URL] and [URL] along with my IP. (I set the ttl to 60 cuz I thought that might be a problem) Now, I do a dig [URL], it gives me this output.
Code:
; <<>> DiG 9.6.1-P2 <<>> thedomz.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40276
[code]...
I can go to my website only when I change my hosts file (on my windows machine).
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Jun 26, 2010
I'm having trouble getting dhcpd to update DNS records in bind9. I'm not seeing any journal files created for bind9. The following appears in syslog when a client machine connects to the network:
Code:
Jun 26 04:07:22 ubuntu dhcpd: DHCPDISCOVER from 00:23:df:44:78:83 via eth0
Jun 26 04:07:23 ubuntu dhcpd: DHCPOFFER on 10.0.0.112 to 00:23:df:44:78:83 (Computer1) via
[code]....
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Aug 28, 2010
I operate a home network with Ubuntu Server 10.04 with services including DHCP3, Bind9, Apache, and so on. Since I host several dozen websites from home, I have to run Bind DNS. All Ubuntu boxes on my network operate fine. However, all Windows boxes on the network seem to forget to look internally for DNS after a couple of page loads on my internal sites. The network settings still indicate that my internal domain name server is the first lookup and everything seems normal.
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