Server :: Calculate BIND Query Per Second?
Jan 4, 2010I 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.
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CentOS 5 Server :: BIND DNS - Verify Query Replying Nameserver
Sep 3, 2010How do I know the reply was from caching-nameserver, master nameserver or slave nameserver in BIND DNS.? Can I trace the nameserver that replied my dns query? Like I have a master nameserver, a slave nameserver and a caching nameserver in my network. Is it possible to know that which of these servers replied my dns query? Also can i trace back that replying server exactly?
View 3 Replies View RelatedServer :: What Is Bind Vs Bind-chroot Vs Caching-nameserver?
Jul 8, 2011what is bind vs bind-chroot vs caching-nameserver ?what is the different between eatch others ?
View 7 Replies View RelatedServer :: Redirect Local DNS Query To Remote DNS Server On Non Standard Port?
Feb 19, 2010The 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.
Server :: Calculate Memory Available If Needed On A System?
Jul 16, 2010I have set swappiness to 0:
# sysctl vm.swappiness
vm.swappiness = 0
According to various sources, this should mean that applications have priority over file chaches, and swap should only be used when the applications themselves need more memory than is physically available. So I naively took the value free provides in the '-/+ buffers/cache' line as 'free' as the amount of memory to be available on the server. Unfortunately this is not even close to true: On a server with 20GB RAM, memory utilization by this measure never reached 50%, yet the system swaps.
I then figured out that I could use 'sync; echo 3 > /proc/sys/vm/drop_caches' to drop cached stuff. I was very surprised to still have 12.5 GB cached data after doing that. I am figuring that it's those 12.5 GB which force the system to start swapping. I also tried to use /proc/meminfo to figure out how that cached memory is used (by comparing its content before and after dropping caches). However, I don't see the correlation between the numbers provided there and what part of the cache can be dropped.
The closest match seems to be the 'Mapped' line, which was 10GB. I am pretty sure that being mmapped keeps the kernel from dropping cache. However, the value is 2.5 GB less than the cache which can't be dropped. So it is not the whole answer. What I am looking for is some way to determine how much memory the kernel could provide by dropping stuff if he needs to because of memory pressure. Is there maybe a way to simulate drop_caches without actually doing so?
The amount of potentially available memory does not have to be scientifically correct, but the number should at least be always in the right ballpark, which right now, it ain't... The point here is that it's a productive system. Sy doing stuff like dropping caches or filling memory until the system starts to swap is not a permanent solution to figure out the value. By the way, it turned out that postgres was the culprit in this concrete case, stopping it made dropping all caches possible, but that does not answer the general question of how to estimate available memory...
1. Is my assumption correct that I can subtract 'Mapped' from the freeable cache memory completely?
2. Where could the other 2.5 GB be used?
3. Is there a way to get a better guess of how much memory the system can free if necessary, before swap has to be used?
Server :: Calculate The Total Amount Of Memory Used By The System?
Jul 15, 2010I want to calculate the total amount of memory used by the system, Someone please confirm if the below formula is correct.Quote:
((memUsed-mebBuffers-memCached)*100)/memUsed => totalMemoryUsed%
Code:
free -o
total used free shared buffers cached
Mem: 8167004 8115292 51712 0 87680 1444676
Swap: 8388584 3252996 5135588
((8115292-87680-1444676)*100/8115292) => 81%
As per the above calculation 81% of memory is used.Is this correct? and if so Am I running out of memory?what is the limit in % that I should maintain for a better performance?
Server :: Windows 7 Cannot Query Named DNS Server
Aug 17, 2010Been 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 RelatedGeneral :: Query On Ldap Server
Aug 4, 2010I 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 RelatedNetworking :: How To Query Against DNS Server With Windows Client?
Jun 16, 2010I'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 RelatedGeneral :: Hardware Server Beginner Query
Nov 4, 2010i have a server which was handover me, it has redhat 4 u3.but i cant find the machine model no, it is hp g4 server, so this info from linux where can i see
2nd if i want to know what is the bios version and date how can i see from linux.
3rd if any hardware failing like network card, ram memory, hard disk how we come to know hardware.
Server :: MySQL Query Browser Connection Help
Jan 28, 2010i have MySQL on my CentOS server and have installed it and got it up and running through the command line.
I have changed root's username and password so there is no user called 'root' anymore. I also created a database called pancakes.Now when i try to log in using Query Browser, i put the server's IP in 'hostname', my new roots username and password in 'username' and 'password'.When i try to log in it gives me error 1130 and says connection from myhostname not allowed.
Server :: Using WGET And Escaping URL With Query String?
Jul 12, 2010There is a partnering website that provides an RSS feed to display on the website I am working on. The website displays information on the feed every time a user accesses the website. The feed changes almost every day. For bandwidth considerations and speed, I would like to download the feed once by the server using a crontab job (my website is in a linux shared hosting environment). The problem exists with the URL structure, which I have no control over.
Here is the URL:
Code:
[code]....
I am aware that there are characters that need escaping and this is where I am getting my errors. I have never written a shell-script but I am also assuming some of the characters are keywords in the Shell Scripting language or Linux I am also aware that I can avoid having to escape by enclosing the URL with single or double quotes. You will notice that the URL has BOTH single and double quotes, so its not as simple.
General :: Query A DHCP Server To Get The Local DNS Servers?
Dec 30, 2010I have a ClarkConnect (CentOS based) box running as my home router on a RR connection. I had the DNS servers set up to use Google's DNS server. I want to change them back to the local DNS servers but I can't find an obvious/easy way to get those address short of a) reconfiguring the router's network to DHCP them (would rather not interrupt everyone) or b) calling their tech support (kill me now!). Is there a command line tool/command I can use to query the DHCP server on the external NIC to see what DNS servers it would set me up with w/o munging my existing setup?
View 1 Replies View RelatedServer :: Cron Does LDAP Query For Local User?
May 19, 2010We've got crontabs set up in /etc/cron.d to run various things, and we have them running as a specific local user.
Watching the LDAP logs, I can see the servers in question making requests for that username to the LDAP server every time cron runs, even though that user isn't in LDAP and is only local. nsswitch is configured to do "files ldap" as well.
The constant stream of LDAP queries is killing LDAP and making it impossible to log into our boxes.
why cron is querying LDAP for a local user?
Server :: Configure The Connection Dialogue Box In Query Browser?
Mar 8, 2010I have installed mysql package in ubuntu 9.04 .I have also installed the query browser software can someone tell me how to configure the connection dialogue box in query browser. also my friend is using ubuntu 8.04 when he writes mysql in terminal he can directly execute database queries there but when i try the same thing on 9.04 i get an error as "Access denied for user 'ravi'@'localhost' (using password: NO)"
View 1 Replies View RelatedServer :: Script Query - Create A Folder With An Environment Variable?
May 18, 2010I am busy learning shell scripting, and I managed to get my first few right, but now I am trying to do something that I know how to do in Windows, but not in Linux. Basically, during a file copy, I want to create a new date for each folder on a daily basis to copy backups into.so, in windows the syntax would be "xcopy %systemroot%ackupslah.blah \servernameackups\%date%"in linux I am running a "cp blah.gz /mount/blah" I want to create a folder with the date based on the current date.anyone know how to get the same right in shell script?
View 10 Replies View RelatedProgramming :: Web Page On Apache Server Query MS Access Database
Jan 18, 2010I have an access database and I would like to build a website on the slackware 12.2 server running apache 2.11.14 to let users query data from the MS Access database. I am thinking that I could just do it in jscript and make a jdbc connection and that should be good. What do you guys think.
View 2 Replies View RelatedUbuntu Servers :: Home Web Server - Cant Set Up Apache As Named Server Using Bind DSN
Dec 7, 2010I and setting up a home web server using Ubuntu 10.04 server (local only). I am currently using Webmin 1.53 to access it remotely all is going great very easy to use. Webmin - Check, ftps-fileZilla - Check, Apache -It Works BUT I cant seam to set up Apache as a named server using Bind DSN. Tried most of the help in the fourms and ..... I think my problems is in the master server selection, do i have to use [URL]... or can i just use myservername. I have tryed both with no luck. First time with the server addition.
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Networking :: Turned On Query Logging On Our Name Server And Immediately Saw Repeated Queries For?
May 14, 2010I 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
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Networking :: Creating Domain Name In Bind Exposing Bind To Internal Network
Sep 3, 2009I am configuring bind9 on fedora 9(sulphur).I have configured /etc/named.conf and created zone file in /var/named/I have started the service but when I am executing the command nslookup mydomain.com it is not able to resolve the name.Another problem I am facing when I do telnet localhost 53,I am able to connect.but when I do telnet myip 53 it does not connect.Seems to be a firewall problem but I ve disabled iptables selinux completely even I ve disabled dnsmasq but still not working.
View 1 Replies View RelatedServer :: BIND Server Test Not Answering Authoritatively?
Jun 14, 2010I have a BIND server that I'm setting up with different views. There is another server out on the public Internet that currently handles all inquiries for this domain. I had installed the Yum packages, chroot, etc. and edited the config files by hand. When that didn't work, I erased the server and started over using Webmin to build everything for me. Same result. I want to setup and verify everything is working on this new server before I take it into production.This is in /var/log/messagesQuote:
Jun 13 21:33:20 dns1 named[13838]: starting BIND 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 -u named
Jun 13 21:33:20 dns1 named[13838]: adjusted limit on open files from 1024 to 1048576
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Server :: Configure Address Of Next Level DNS In BIND Server?
Sep 24, 2009I need to know how to configure the address of the next level DNS server in my BIND server. im in a FEDORA 10 system.
View 3 Replies View RelatedServer :: Bind Windows Xp Machine To Domain Server?
Jan 17, 2010I want to join standalone windows xp machine to Linux Domain (Redhat 9)..
View 3 Replies View RelatedUbuntu Security :: What Firewall Rules Would Recommend For Receiving Forwarded DNS Query Responses To Server
Jun 6, 2011I have my own internal bind9 server, for my local domain, and I forward internal requests for public domains to OpenDNS servers. This server is not in a DMZ, but is instead behind an dynamic NAT. I do not accept queries from the public network, only responses. I understand that DNS is primarilly a UDP protocol, so it can't pass through a stateful/nat. without a firewall allow.
I've done a little reading and learned that bind9 does not run 53 <-> 53 anymore (is now >1024 <-> 53), and modified my config so it works like bind4 did, but I am concerned that this makes me less secure. additionally, I'd really rather not have a completely open 53 rule, but it seems that if I constrain 53 traffic to my known forwarders, it interfers with some of my network services like transmission. so, what firewall rules would you guys recommend for recieving forwarded DNS query responses to my server?
Server :: MySQL Error 134 From Storage Engine Query: Select Data, Created, Headers?
Mar 1, 2011I need help about the error in my website. I have the following error....
Code:
user warning: Got error 134 from storage engine query: SELECT data, created, headers, expire, serialized FROM cache WHERE cid = 'theme_registry:database1' in /var/www/html/web/includes/cache.inc on line 26.
Server :: Bind ** Server Can't Find Example.com: NXDOMAIN?
Jun 26, 2011I'm trying to setup DNS server. But i'm getting this strange problem.normally nslookup and workin for other sites.problem only with my local setup. can't see what i'm doing wrong.i've had setted up DNS server before but had no problems.can't see any solution on google.
So...
centos 5.6
bind 9.7 (from repository)
[code]...
Server :: BIND Server No Longer Working
Jun 8, 2011I am still quite new to all this but I guess we were all beginners once, this forum seems very helpful.Here is my situation, I will give as much detail as I can.I have a dedicated server which is running CentOS release 5.5.Initially I had Plesk installed, but when I upgraded PHP I damaged the Plesk configuration, and so I installed Webmin instead.
All seems to be fine with this, apart from the DNS configuration / BIND server.I know this because I have one site which uses an external DNS server and this works fine (i.e I can access it from a browser). All the others don't resolve - i.e the ones I set up in Plesk.I've done a bit of investigating to see what is going on, but I'm stabbing in the dark a little.
Server :: CentOS BIND Local DNS Server
Nov 28, 2010I've been looking for a good tutorial for setting up a BIND DNS server for my local network. What I want to do is..Have BIND running on my home server receiving all DNS requests.Have certain zones (my.zone.lan) pointing to custom IP addresses (I.E. server.lan points to 192.168.{server IP})Zones that don't exist should be passed on to OpenDNS for processing.
View 6 Replies View RelatedServer :: Client Computer Not Dig Bind Server?
Jul 28, 2010I have configureed Bind in a Linux box. Well pc1 i.e "pc1.mydomain.com" is my client machine and main server is the computer in which bind is install.The client computer pc1 and the main server (Bind server) i.e FQDN "mainserver.mydomain.com "are on the same network.from client machine i can't resolve the name to IP address as my server do successfully with client. The /etc/resolv.conf file in my bind server is as
Code:
search mydomain.com
nameserver 192.168.1.254
The named.config it main configuration is as below
Code:
zone "mydomain.com" IN {
[Code]...
Server :: How To Install Bind Server On RedHat 5
Apr 26, 2010How to install step by step to install bind server on RHEL 5.
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