Networking :: Turned On Query Logging On Our Name Server And Immediately Saw Repeated Queries For?

May 14, 2010

I recently turned on query logging on our name server and immediately saw repeated queries for . (dot). I've not seen this before. It looks like a really sloppy DOS. What would this return if my NS was misconfigured?

May 13 18:11:41.710 queries: info: client 91.202.63.129#56089: query: . IN NS
May 13 18:11:42.083 queries: info: client 91.202.63.129#62826: query: . IN NS
May 13 18:11:42.788 queries: info: client 91.202.63.129#13620: query: . IN NS

[code]....

View 2 Replies


ADVERTISEMENT

Networking :: How To Forward All DNS Queries Through ISP DNS Server?

Jul 5, 2011

I would like configure a DNS server on Debian, only to forward through my ISP DNS servers.

View 4 Replies View Related

Fedora Networking :: DNS Queries - Connect To A Ssh Server ?

Aug 28, 2011

How often are dns queries sent? Assume I want to connect to a ssh server, will I send one dns-query in order to do that or do I send multiple during my connection? What if I request web-pages, do I send a query only when I enter a site or will I send queries every time I visit a new page on that site?

I'm asking since I'm considering getting an account at dyn.com (the standard account for $30/yr) and it comes with 600 000 queries per month (which is way more than I expect to get but knowing exactly what it means is always good).

View 3 Replies View Related

Ubuntu Networking :: Wireless Switch Can't Be Turned On Again After Being Turned Off

Feb 2, 2010

The wireless connection works fine. The wireless switch automatically turns itself on every time I start the computer. However, after turning it off, I can't ever turn it on again unless I restart the computer. And because of this, the wireless connection is disabled until the next time I start the computer.I don't think this is a hardware problem because the switch can be turned on and off, although not in the way I expect.

I'm using ubuntu 9.10 on an Acer Aspire 4740G. The command [lspci | grep Network] shows Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01). the [rfkill list] command shows (when the switch is on)

0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

and, as expected, shows (when the switch is turned off)

0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes

I just want to be able to turn the switch on or off at any time I want as long as the computer is still on.

View 2 Replies View Related

CentOS 5 Networking :: Bind Server Not Responding To Client Queries

Mar 4, 2011

I am bit new to Linux and have setup caching-only name server with Centos 5.5. when i do dig server, it provide resolutions. but when i use the server IP as DNS on my windows client, it says, "connection refused" on the NSlookup output. (IP table didn't enable) My server Ip is 192.168.1.253 and bellow is the configuration of "/var/named/chroot/etc/named.conf"

options {
listen-on port 53 { 127.0.0.1; 192.168.1.253; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt"; .....

View 9 Replies View Related

Networking :: How To Query Against DNS Server With Windows Client?

Jun 16, 2010

I'm trying to setup a linux box to act as just a DNS server. Its something I'd like to use just for WAN type requests and leave other domain related things to the Server running WIndows.At this point on my Linux box, I can run queries and nslookups from it. I can not however, from a Windows box, run a NSLOOKUP command from the Linux box which is telling me to check the permissions from Linux to enable that for the clients. It's enabled.From a C: I type in nslookup - *ip of Linux box* and it tells me -- Can't find server name for address.

View 4 Replies View Related

Ubuntu Networking :: Trying To Copy Id_rsa.pub To Remote SSH Server With Key Auth Already Turned On

May 16, 2011

New machine, need to append my id_rsa.pub to my remote SSH box, cannot use ssh-copy-id because I cannot specify the port I've got the machine running on.

View 1 Replies View Related

Ubuntu Security :: Difference In The Output Of A Port Scan Using Zenmap On The Same System With UFW Turned Off And Then With It Turned On

Feb 16, 2010

This is the difference in the output of a port scan using Zenmap on the same system with UFW turned off and then with it turned on. It is obvious that UFW works.

View 6 Replies View Related

Server :: BIND Refuses Queries ?

Feb 15, 2010

I am currently running the latest version of Bind, and for some completely unknown reason I can NOT get queries to work for PTR records. All queries to the servers for reverse name lookup get query denied:

Using domain server:
Name: 66.150.173.1
Address: 66.150.173.1#53
Aliases:

Host 27.173.150.66.in-addr.arpa not found: 5(REFUSED)

And it shows in my logs:

I am at my wits ends with the piece of crap. Can anyone shine some light on why this damn Bind install won't respond to these queries?

For reference here is my named.conf:

Code:

View 15 Replies View Related

Server :: Named Not Responding To Queries

Feb 23, 2010

My DNS server used to work flawlessly but for some reason it no longer responds to queries. It seems that named always queries internet root serves!!

View 3 Replies View Related

Server :: Stop All Outbound DNS Queries?

Nov 7, 2010

I have internal-only email server that has internal BIND9 running. Thought it only has its IP address defined in /etc/resolv.conf, it is still resolving outside addresses.

View 2 Replies View Related

General :: Run Queries Against Microsoft Sql Server From System?

Jan 9, 2009

Is there a way to run queries against a Microsoft sql server from linux? Here is what I would like to do. When I create apps that us db back end I would like to quickly check results of my queries. so if I could do something like "select * form Orders" from the terminal or another app that would be great.

View 6 Replies View Related

Server :: Bind9 Log Full Of Localhost Queries?

Feb 24, 2011

I have my bind9 DNS server running on Ubuntu with logging on. What's bothering me is that I have log full of localhost queries instead of from IP of the computer which actually asked.DNS queries log:/var/log/named.queries.log

Code:
24-Feb-2011 16:01:19.413 client 127.0.0.1#38022: query: clients4.google.com IN A + (127.0.0.1)

[code]....

View 6 Replies View Related

Server :: BIND 9.5 On Fedora Core 9 Not Resolving Dns Queries

Apr 21, 2010

I have this ISP grade Nameserver running on BIND 9.5 on Fedora Core 9 64 Bit.

Its been pretty working well for sometime until a last week when we noticed it stopped resolving for our clients using on our service.

It gives correct authouritative answers for our own ISP domain with the A, PTR and MX intact but does not return resolving queries back to clients.

Below are my files

This is the message from /var/log/messages

The 41.223.x.x and 41.215.x.x ip address are from our ISP subnet and so are our own clients being denied.

The box is also hosting our traffic graph server which is on a LAMP but listens on another IP/ethernet card.

So far the load on the server is minimal as is a Dell R200 rack server.

View 11 Replies View Related

Server :: DNS Merge / Intercept Queries From Zone File

Jun 4, 2010

I chose -Server-, if this is more appropriate in -Networking-, just let me know. Basically, I need to be able to merge responses stored in a zone file with responses from an "upstream" authoritative server. I'm in the sad position of needing to "intercept" requests to *part* of a domain (but not restricted to a sub-domain!) and return results for *some* hosts that use an internally routed address, and results for the rest using the public internet addresses. Unfortunately, it's not my domain, so I can't just use views (although I suspect they could end up having some part to play in this, at least potentially)... but instead I have to actually send requests recursing to the other site's external DNS for any hosts my server doesn't have records for in the zone file.

Some background on the situation:
I work at a local government, which has a private link / VPN connection to a state government entity, and needs to use internal addresses for some of the state servers, which then get routed over an "internal" network link. But the state uses the same domain name internally and externally, just presenting views to internal clients vs. external clients. -- However, we are only being allowed access to certain of their servers through the internal link, which means that for any other servers that we don't have internal/private access for, we have to visit the public addresses just like anyone else on the internet... So, I can't just send all requests to their internal DNS and get responses, because we'd get IPs for some servers (e.g. their main web site) that we wouldn't then be able to reach using the internal network link.

For Example: Say I have a client machine, "client1", on my network ("my.net"), which uses "mydns1.my.net" for name resolution ... and which needs to access 2 servers on the state network, "private.st.us" and "public.st.us" -- so named based on how "my.net" needs to access them.

The external state DNS server/view ("ext-dns.st.us") responds to requests with something like:
private.st.us -- 1.2.3.456
public.st.us -- 1.2.3.457
(Those are just crap addresses, obviously.

The internal state DNS server/view ("int-dns.st.us") responds to requests with something like:
private.st.us -- 10.0.0.8
public.st.us -- 10.0.0.10
This works on their network because their own clients have access to all such IPs.

But for us, they only allow traffic flowing between "my.net" and their internal network to reach the 10.0.0.8 address, blocking all other address destinations. So, when "client1.my.net" asks "mydns1.my.net" for the address of "public.st.us", I need "mydns1" to recurse out to "ext-dns.st.us" to get an answer (1.2.3.457) and then return that IP to "client1" -- because "my.net" is blocked from accessing the server's 10.0.0.10 address. But, when client1 asks mydns1 for "private.st.us" I need to pull the IP (10.0.0.8) from a local zone file instead of asking either of the state DNS servers -- or optionally forward the request to "int-dns.st.us" I suppose -- because the state blocks access to certain services (which we need and are the whole cause of this problem!) via the public (1.2.3.456) address.

View 1 Replies View Related

Software :: Caching-only Name Server To Forward Queries-Bind

Feb 14, 2011

I can configure a caching-only name server fine, but how do I make it forward DNS queries too?

I'm thinking I could add the below to the options stanza in the /etc/named.conf file:

View 1 Replies View Related

Server :: Start Postfix Server Than Immediately Maillog Is Starting To Grow

Mar 18, 2010

I am running CentOS 5.4 and Postfix. So when I start Postfix server than immediately maillog is starting to grow. And the first lines that I see in it are:

[Code]...

Server is already in several blacklists and I desperately need to do something.

View 12 Replies View Related

CentOS 5 Server :: Dnsmasq Starts But Doesn't Reply To Queries

Sep 5, 2010

trying to configure a Centos 5.5 server (simple file server with DHCP and DNS relay). I configured and tested the config (by 'service dnsmasq configtest') of dnsmasq and I got the message 'dnsdomain:host unknown (translation of the real message : hte inconnu) and I didn't find where I could define this host ! The hostname of the server is well defined and I can see it from all Windows PC's on the LAN. dnsmasq starts (with hte same message as in configtest) but when querying DNS from PC's te.g. trying to surf the Internet), I don't get replies (3 DNS servers are also well defined and operational).

View 2 Replies View Related

Ubuntu :: Give Access To A Server In Order To Make Repeated Trials Of Traceroute To Different Hosts

Feb 15, 2011

I want to give access to a student to a server in order to make repeated trials of traceroute to different hosts. We have realized that it is preferable to use the -T option, as it sends TCP packets that are less commonly blocked by firewalls. However, this option is only available to superusers, and I don't want to grant the student such privileges.

View 2 Replies View Related

Ubuntu Networking :: Route DNS Queries Through Tunnel Too

Jul 6, 2011

I set up a routed OpenVPN server. Everything works fine. But I'd like to route the DNS queries thru the tunnel too. So I added:

[Code]....

Can't find server name for address 10.8.0.1: Non-existent domain Even thou I have a DNS server set up correctly (on the same server as the VPN) with recursion. I verified that by sending queries form external source, which worked fine. I suspect that the Bind server doesn't listen to the tun0-interface only eth0, but the Bind manual says it should listen to all interfaces by default. The server log shows:

Code:
named[9639]: client 10.8.0.10#3807: RFC 1918 response from Internet for 1.0.8.10.in-addr.arpa

How do I get these DNS queries to resolve thru the tunnel?

View 9 Replies View Related

Ubuntu Networking :: Accessing Windows Share, Repeated Request For Authentication?

Jul 31, 2010

I am using Kubuntu 10.04, but I am posting here because the Kubuntu forums seems to be user agnostic. I just couldn't get past the verificaiton process. This should be a general networking problem that Ubuntu users can answer. On my home network, I have a Windows machine whose shared folders I can access from one machine running Ubuntu 9.04. I've had to do no network configuration on Ubuntu, it just works out of the box. On Windows I do not have a password that I use to login. Ubuntu does not ask for it either.

But on Kubuntu, when I browse the network samba shares, I can see my Windows share, open it, navigate it, but every time I cd into another level in the share or click on a file (say a music file to play), the authentication window pops up asking for a user name and password. What login information should I use here? I tried my Windows user name and a blank password,

View 8 Replies View Related

OpenSUSE Network :: Warning: Name-Server Ns.xxxxx.ch (nn.nn.nn.nn) Answers Recursive Queries

Jul 19, 2010

I have registered 2 nameservers running bind for a certain domain. The log file of my domain name provider (SWITCH) shows the following warning:

Warning Der Name-Server ns.xxxxx.ch (nn.nn.nn.nn) beantwortet rekursive Anfragen.

In English that would be:

Warning: Name-Server ns.xxxxx.ch (nn.nn.nn.nn) answers recursive queries.

The NS triggering the warning is running openSUSE 10.2 and the other one 11.1. Both configuration files /etc/named.conf are equivalent (well, forwarders are different). There is no such warning for the NS with 11.1. When I add "recursion no;" to the options in /etc/named.conf the warning goes away, but FF or SeaMonkey running on the server no longer get their DNS requests resolved.

View 9 Replies View Related

Server :: Telnet To Smtp Server Is Closing Immediately?

Apr 18, 2011

I've configured postfix on my linux server. For the most part, I got everything working (IMAP, apache, etc) but for some reason, I can't get postfix to work remotely. Postfix works locally to send mail. E.g. when I telnet locally to port 25. However, when I try to telnet from outside, the connection closes almost immediately. I've looked at various configuration options and tuning enhancements but found nothing helpful. Here is my config:

Code:

main.cf:

#See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default

[code]....

View 4 Replies View Related

Networking :: Djbdns Doesn't Reply To External Queries?

Apr 27, 2010

I got a mission to move our company's ns3 from one machine to another.I've installed the djbdns software on other machine, configured it(or at least I think soand if I make a "nslookup www.google.com 195.222.14.7" query from that paticular server then I get an answer straight away, but if i make the same query from local machine i get connection timed out

View 12 Replies View Related

Server :: Redirect Local DNS Query To Remote DNS Server On Non Standard Port?

Feb 19, 2010

The issue is that my CentOS workstation is in a vlan from where the Intranet's DNS servers are unreachable. For browsing the web there is an ISA proxy server, which I presume resolves DNS for my firefox. However, wget, host, ping and aria2c fail to get any sort of DNS resolution since they're being run from command line.I have exported HTTP_PROXY value, which provides me internet access on console, but,only when I connect using IP address. It fails on name resolution.

My question is:May I redirect the DNS queries to my home PC which would be running a DNS server on a non standard port?I was thinking of putting nameserver 127.0.0.1 in /etc/resolv.conf and then put iptables rule to redirect 127.0.0.1:53 UDP to a.public.ip.address:3535 UDP..I don't know if I am shooting blanks or what, I am not very much aware of this kind of setup.My main need is to provide DNS resolution to console apps.I want to utilize my company's idle bandwidth for bulk downloads, so, using proxy, SSH tunneling through my Home PC is out of question.

View 8 Replies View Related

Server :: Updated The Password Immediately In The Ads?

Dec 24, 2010

i am integrated ADS with squid and its working fine. In squid server end i have used "net ads password" to update new password for the user and it successfully updated. Issue is update not doing immediately it takes long time to update the password , even i restarted the smb and winbind services. I want to updated the password immediately in the ads server. is this possible ?

View 3 Replies View Related

OpenSUSE :: 11.2 TightVNC Server Immediately Disconnects?

Mar 17, 2010

I am trying to run VNC server on a standard OpenSUSE 11.2 Gnome Desktop installation.I have done this succesfully with SLES for sometime, however, my experience with OpenSUSE 11.2 is that it doesn't work out of the box!!

I am using XP Pro VNC viewer Free Edition 4.1.2 to connect.

I have removed "localhost" from the # special IPv6 addresses in hosts. This fixes the black screen issue for me. All appears well until I disconnect and retry the connection after 5 minutes or so. Then VNC client makes the connection and then immediately disconnects. It's a no go from then on. If I reboot OpenSUSE 11.2 it works again but then reconnect fails again after the same period of time.

I am trying NX now as an alternative. However, I would much prefer to use VNC.

View 9 Replies View Related

Server :: Windows 7 Cannot Query Named DNS Server

Aug 17, 2010

Been hunting around and trying this for a few days now, without any success.I have configured a CentOS 5.5 box to start up named on boot. I have a Windows 7 machine currently going straight to the router for its DNS, that I want to point to this box instead.While I have done all the tests on the Linux box, and everything says it's working, my Windows 7 box just can't seem to contact the named service.While I am certain that my firewalls are configured correctly ( as I was able to connect through with Cyberkit on the other ports that are open ), I have even switched off the firewalls on both machines entirely to rule them out. And they still can't connect.

View 3 Replies View Related

General :: Query On Ldap Server

Aug 4, 2010

I configured ldap server & client on centos,then i connected centos and suse with network.now want to get group of any user from this server via suse.is it possible with perl scripts? or i need to install other modules on suse or centos?(such as : pam,nss)

View 8 Replies View Related

Server :: Calculate BIND Query Per Second?

Jan 4, 2010

I am working one project and i want to know that is it possible to find out the DNS (BIND) QPS (query per second). I mean how many QPS BIND can handle.

View 2 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved