Ubuntu Servers :: Bind9 Attempting Ipv6 On Ipv4 Network
Oct 29, 2010
After upgrading from 9.10 to 10.04, a hundred or so of (for example)
Code:
error (network unreachable) resolving '14.42.117.203.in-addr.arpa/PTR/IN': 2001:500:13::c7d4:35#53: 1 Time(s)
messages appear in syslog each day. Each URL has from 2 - 6 attempts at various ipv6 addresses. My question is why is bind9 trying to resolve ipv6 addresses? I have done nothing to enable or disable ipv6 and thought that if not explicitly enabled I would not have to be concerned with it.
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Feb 25, 2011
I want to modify apache IPv4 configuration to IPv6 configOn both windows and ubuntu.
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Feb 19, 2010
How do I assign IPv4 and IPv6 static addresses permanently in OpenSUSE 11.2? Currently I am only able to assign either IPv4 or IPv6 static address not both. I cannot find even the interfaces file(/etc/sysconfig/network/interfaces).
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Feb 6, 2011
I'm using Ubuntu Linux as my operating system.In my network only the ipv4 is suported, and I need to access some website through ipv6. How can I do it, is there a way to tunnel from the ipv4 to ipv6.
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Jul 3, 2011
I'm running a native dual-stack (ipv4 & ipv6) dsl connection.So, I've been adding firewall rules, cleaning up unwanted processes, etc to tighten security.I'm left with only 3 processes that are listening to ports. mysql, ipp & ssh.Still not quite sure I need mysql. I run Amarok but without using a database, so I don't actually use sql for anything that I'm aware of.Anyway, my question is;Is it possible to make any any of these processes listen to ipv4 only or ipv6 only? Is there a distinction there at all?
Example- ssh is currently listening to port 22 on both tcp & tcp6. I do all my ssh connections using 'ssh -6', so, Can I make ssh listen to tcp6 only, or ignore tcp ?
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Sep 1, 2011
On my 10.04 LTS Ubuntu Server installation, apache2 doesn't bind to ipv4. It does bind to ipv6. I didn't notice this at first, because from my home connection I could visit the webpages without trouble. I noticed it running netstats -ta:
Code:
tcp 0 0 localhost:10024 *:* LISTEN
tcp 0 0 localhost:10025 *:* LISTEN
tcp 0 0 localhost:mysql *:* LISTEN
tcp 0 0 localhost:spamd *:* LISTEN
[Code].....
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Jun 11, 2011
I have an OpenVPN(10.04.2 LTS) server running in bridge (TAP) mode. Its sitting behind a router and then a cable modem. The VPN works perfectly but I have a security concern. In order to allow the VPN clients to connect to the internet, I had to enable IPv4 forwarding on the server. Is this is a security hole? Can a hacker access my servers connection from the internet (without authenticating with OpenVPN) and access my network. Can someone use Ipv4 forwarding to access my LAN network from the WAN
I used this command to enable ipv4 forwarding
echo 1 > /proc/sys/net/ipv4/ip_forward
Without IPv4 forwarding my VPN clients can only access my LAN and router, but they cannot reach my modem or the internet.
[Code]...
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Jun 8, 2011
Is there a way to access today the openSUSE servers via IPv4? My ISP does not support ipv6, nor my router, and I can't install software right now in openSUSE, because it wants to access te servers via IPv6.
If would be grat to have the download.opensuse.org ipv4 address.
I really need to install some packages, they are required for my school project.
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Mar 21, 2010
setting up NAT and firewalling for both IPv4 and IPv6. The machine is headless, so everything must be configured via CLI. I've done all IPv4 firewall configuration writing iptables rules in a bash script so far
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May 6, 2011
I've got a Ubuntu Linux box that has two IPv4 addresses and an IPv6 address. This is my current /etc/network/interfaces:
auto lo
iface lo inet loopback
auto eth0 eth0:0
[code]....
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Mar 12, 2010
How do you I use duel stack i.e How do I use ipv6 packet inside ipv4 packet using fedora kernel 12 ?
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Jul 16, 2010
Question (and Google results aren't making this clear): Ubuntu has both iptables & ip6tables installed. 1. If I set a rule in iptables, does that rule also apply to ipv6, or just ipv4?
2. If "no" to above, then it would be prudent to *also* set ip6tables rules as well if I want to maintain an active firewall, correct?
3. Does ip6tables rules have the same syntax and behavior (more or less) to iptables rules - i.e. can I just copy my iptables rules & change "iptables" to "ip6tables"?
4. Any gotchas or issues that I should be aware of?
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May 25, 2011
I use DNS on my server as a chasing DNS so its not fully configured. I seem to be having trouble with IPV6 addresses. I'm guessing this is linked to the 6to4 tunnel I have set up to my windows box, but I'm not really sure.
Code:
May 21 18:00:16 hyrule named[1148]: error (network unreachable) resolving 'D.ROOT-SERVERS.NET/AAAA/IN': 2001:dc3::35#53
May 21 18:00:16 hyrule named[1148]: error (network unreachable) resolving 'B.ROOT-SERVERS.NET/AAAA/IN': 2001:500:1::803f:235#53
May 21 18:00:17 hyrule named[1148]: error (network unreachable) resolving 'zg.akamaitech.net/AAAA/IN': 2001:503:a83e::2:30#53 .....
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Oct 29, 2010
I'm forging a gateway server, We have 2 Internet connection that goes to a load balancer router, and goes to my centos server and from our server goes to a switch for Internet distribution or routing.
OS-CentOS 5.5
[root@server etc]# uname -srio
Linux 2.6.18-194.el5 i386 GNU/Linux
My eth0 and eth1 has the following configuration and IP
[root@server etc]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# VIA Technologies, Inc. VT6105/VT6106S [Rhine-III]
DEVICE=eth0
BOOTPROTO=none
[code]....
Disabling IPv4 packet forwarding but i already changed it to 1 at sysctl.conf One of the online forum says i need to configure the named.conf deleted some and run it(named.conf) and successful but still when I run network service I still get the :"Disabling IPv4 packet forwarding: net.ipv4.ip_forward = 0" The network is getting the IP range but it doesnt get any Internet connection.
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Jan 24, 2010
I have a Karmic server install on which I've set up a network drive mapping to a NAS (CIFS). I'm having trouble with automounting the disk though, as (from what I can tell) the disk is attempting to mount before the network is up.dmesg shows the following:
Code:
[ 10.421192] lirc_dev: lirc_register_driver: sample_rate: 0
[ 10.427116] lirc_mceusb[2]: Topseed Technology Corp. eHome Infrared Transceiver on
[code]...
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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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Jan 5, 2011
how to make a Ubuntu 10.04 server VM look for an IPv4 address if it doesn't seem to by default?
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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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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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Sep 2, 2009
Can someone explain me ipv4 notation like:
192.168.1.0/255.255.255.0
Does it mean "any host on 192.168.1.x" network?
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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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Sep 2, 2010
I am using samba4 and bind9 (9.7.2rc1) on an ubuntu server 10.04.
Everything works fine, but bind9 ist unable to update DNS entries sent by clients.
I followed the tutorial [URL] but it doesn't work for me.
It doesn't look like a file permission problem:
Code:
-rw-r--r-- 1 root root /usr/local/samba/private/dns.keytab
-rw-r--r-- 1 root root /usr/local/samba/private/dns_update_list
-rw-r--r-- 1 root root /usr/local/samba/private/named.conf
-rw-r--r-- 1 root root /usr/local/samba/private/named.conf.update
[Code].....
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Jan 23, 2011
I'm working in windows, and that's why I have been able to access the network. In F14, I was able to access the router address while the internet access ain't. Tried restarting network, and still the problem persists. Tried [URL] and the only thing that i've infered is that IPv4 Failed: FATAL plus, the routing table showed 0.0.0.0 as one of the entries (Gateway). So, i've deleted the wired network configuration from the Network Configuration and checked whether the os would pick it up automatically. It still didn't work.
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Jun 28, 2011
I had some fun here, with my local Cyrus IMAP daemon. I "updated" the machine to openSuse11.4 (from 11.2) by doing a fresh install. Because some of my involved HW here isn't capable of IPv6, I switched it off using yast2:
Netzwerkgeräte/Netzwerkeinstellungen [my translation: Network devices / Network Settings] Globale Optionen [global options] Removed the mark on "IPv6 aktivieren" [activate IPv6]
Then I had a hard fight with Cyrus IMAPd, mostly caused by user brain damage on my part... But one thing really looks like a problem on the Suse side of the fence: My /etc/hosts missed the "localhost"-entry for IPv4 ! This was the contents:
Code:
# special IPv6 addresses
::1 localhost ipv6-localhost ipv6-loopback
127.0.0.2 godot.site godot
[Code].....
I haven't seen this effect on 11.2 here and I haven't seen it on "my other" machine (running 64 bit version of Suse 11.4). But there I think IPv6 is still activated. I will check this, as soon as I get there.
Should this be reported as a potential bug in 11.4 ? Or is there some way, I could have messed up this. (No I didn't edit /etc/hosts by hand, before I corrected this thing)
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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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