Networking :: Failed Http And Telnet Connections To Dns Round Robin Servers

Dec 2, 2008

So we have DNS round robin set up for 4 servers. If we ping dns name (basically an alias) server_connect it resolves with different IP address in round robin format. I.E. x.x.x.1 x.x.x.2 for the 4 different server IP addresses. When we do nslookup server_connect it will come back first time as server1_connect server2_connect through server4_connect so the server is able to resolve through ping and nslookup resolving the initial dns name (alias) to the dns name associated in the round robin. Problem is when we try to connect with http or telnet it comes back host unrecognized. I can put one of the 4 round robin servers in /etc/hosts and it connects fine so I'm thinking that either one of three things.
1) ttl
2) It does double connection first to identify itself to the round robin server and then handshake but second time it hits for the handshake the IP and dns name is different than what it expected so it fails.
3) Since we are trying to telnet to dns alias and it is returning different dns name it fails.

2 and 3 seem most promising but now I'm at a stand still.Anyone else come across this issue and if so how did you resolve.

View 1 Replies


Networking :: Port Bonding Won't Use Active-backup Using Round-robin?

Dec 9, 2010

I'm trying to configure my Red Hat server to use port bonding for two interfaces going to a switch, and I followed this redhat guide [URL]...-redhat-server but when I attempt to bring the bond up, it simply uses mode 0 (round robin) instead of mode 1, which I specifically configured in /etc/modprobe.conf by doing

options bond0 mode=1

Any ideas why the bond would continue to use round robin when I set it to active-backup?

View 2 Replies View Related

Networking :: Use Round Robin DNS Service For Setting Up A High Availability Solution?

Nov 16, 2010

we use round robin DNS service for setting up a high availability solution ? i want to know whether it will work.

View 1 Replies View Related

General :: SSH In Round Robin Fashion?

Mar 24, 2011

if i am having say 10 number of linux machine over the network and want to setup password free SSH in round robin fashion means ssh from any machine to either machine. one way to do is generate the public key on every machine and put on other machine. is there any other shorter and simple way to do it?

View 5 Replies View Related

Programming :: Scheduling Through Round Robin?

May 10, 2011

Does anyone know how to run 2 threads with round robin scheduling. & can we get the time of these threads when they are context switching. That means I want to know at how much time each thread is taking to run

View 3 Replies View Related

Server :: Round Robin / Exim4 / Mail Delivery SMTP?

Apr 30, 2011

Here is the senario...

2 round robin dns servers
x.x.x.1 (hostname)
x.x.x.2 (hostname)

My problem is that when I try and send an email that is part of the domain, it ends up trying to deliver it locally. I realize it is supposed to, but I don't want that for non-users of the server.

I want to be able to deliver certain emails [] remotely. (

exim4 setup "internet site; mail is sent and received directly using SMTP". This works well as long as it is not an email from

Is there a way to have exim check the users first and then deliver based on local user or not?

Next question. Is having the domain name as the hostname the best way to setup a round robin? (web server)

View 1 Replies View Related

Networking :: HTTP Ping - Brief Textual Description / Round Trip Time

Jan 23, 2011

Is there any tools in linux same as "http-ping. This tool shows for any request :
1-The HTTP return code (and its brief textual description)
2-The number of bytes returned by the server (excluding headers)
3-The time taken to complete the request (i.e. round-trip time)

View 5 Replies View Related

Ubuntu Servers :: Nagios On 10.04 Server Using Apt-get - HTTP WARNING: HTTP/1.1 404 Not Found

Aug 4, 2010

I installed Nagios on my Ubuntu 10.04 server using apt-get and when I accessed the web console, everything was OK. I made some changes to apache (creating some new virtual sites) and since then Nagios gives me a warning message for HTTP with the message, HTTP WARNING: HTTP/1.1 404 Not Found. The sites that I created are working perfectly. I noticed that the attemps are 4/4. Does this need to be reset or does Nagios automatically reset that once it detects the issue is resolved?

View 1 Replies View Related

Networking :: Difference Between Krb5-telnet And Ekrb5-telnet

Feb 18, 2010

I am trying to find the difference between the above two services. Both are under xinetd and can someone please explain the difference between them (is one more secure than the other one?)

View 1 Replies View Related

General :: Outbound Http Connections Blocked

Nov 21, 2010

(centos 5.5 86*64 with cpanel) I am trying to set up a php script.

The script requires an outbound connection to project honeypot and when I go to the honeypot.php on my server I get an error asking if outbound connections are disabled.

They could be...I am not sure where to check, I have checked csf and outbound tcp is allowed on port 80, but I am not sure if I should be looking somewhere else.

Obviously I dont want to make the server insecure, so I am wondering how I can allow this outbound connection.

View 2 Replies View Related

Debian :: Gvfsd-http Leaves Many Connections Open

Feb 22, 2011

Looking at the results of both `lsof | grep IPv4` and `netstat -tp` I noticed that I have a lot of connections open from a program called 'gvfsd-http'.

Using google, I found that this was a Filesystem something from Gnome, that would also be used If I drag something from my browser to my desktop.

Though I wonder, how I activated it, because I didn't do that...

After a bit of searching, I noticed that `` uses the same IP address as the one noted (

PING ( 56(84) bytes of data.
64 bytes from ( icmp_req=1 ttl=56 time=55.4 ms

Question: Do I have some tool enabled that maybe sends statistics to debian or so? Where to find it and kill it.

View 2 Replies View Related

Networking :: WAN Connections To Servers ?

Mar 1, 2011

OK, so, basically, not so long ago I had a modem + LAN cable kind of internet setup, and my friends and colleagues had no problem connecting to my Apache, ircd, etc.

But a few months ago my ISP changed it's policy, and now I have a single cable, plugged directly into the 'eth0' port, which connects to WAN (static IP) and, through PPPoE, to the net (dynamic IP). (Sorry, my knowledge in networking is close to nonexistent)

So, now there is a problem. My friends CAN still connect to my FTP and httpd on Windows XP, through both the external, dynamic IP, as well as the static WAN IP, but my Slackware (WAN IP is set up with DHCP, PPPoE - through pppoe-setup, with firewall at '0') is refusing access. No sings of connection is shown in the /var/log/access_log.

Also, VoiceChatter server DOES log the connection attempt, but it refuses connection, sending a 'Auth challenge', and then cutting connection. (The 'challenge' bit was never there before the new net setup)

All connections are done through WAN static IP (though test with netwide dynamic IP yield the same results =)

I run Slackware 13.1, didn't touch the firewall settings at all, and, as mentioned, pppoe firewall is set to '0' value.

View 6 Replies View Related

General :: Revent Code From Initiating Outbound Http Connections?

Feb 28, 2011

I want to prevent code from making http connections to other, specific hosts. My understanding is this can be done in /etc/hosts.deny. What would that look like?

View 5 Replies View Related

OpenSUSE Network :: Internet Freezes \ It Allows Only Connections To Dst Ports Tcp 80 (http), Udp 53 (dns) And No Frags?

May 19, 2010

I have troubels with internet, on different Linux x64 systems on my laptop(Lenovo ThinkPad sl510), but if I load WindowsPE all is OK ( what coud it be? where to search?There is an hardwere firewall/nat/gateway in my local network, it allows only connections to dst ports tcp 80 (http), udp 53 (dns) and no frags, no icmp, deny in and etc. But Windows Internet (the same Firefox) works fine , and under Linux sites doesn't loding full or "connetion timed out"...But if I have can start downloading any file it would be downloaded full (I have downloaded DVD iso of SuSe)Dns throu nslookup responce not evry time...Decreasing of MTU to 1372 didn't help (( Deactivating ip v6 also....What coud it be? What is different betwin Windows and Linux in DNS clients is any alternative dns client in SuSe? Is the trouble only in DNS?

View 1 Replies View Related

Fedora :: Open Firefox - Get Really Strange HTTP And HTTPS Connections Showing Up In Firestarter

Oct 22, 2009

I've noticed that when I open firefox I get really strange HTTP and HTTPS connections showing up in firestarter (which as I understand it is just a GUI for IPtables). They connect to various bits of a site listed as (when you use "lookup hostnames") such as, they stay connected all the time as far as I can see unless I close firefox. I've heard people say they are connected to Google, but I can close all tabs after loging out of google and still see them... it's very odd.

View 3 Replies View Related

Networking :: Craft A Valid Http/1.1 Request For Getting Http Headers (not The Html File Itself)

Sep 27, 2010

Using netcat, nc(1), craft a valid http/1.1 request for getting http headers (not the html file itself!) for the main index page of www dot aalto dot fi. What request method did you use? Which headers did you need to send to the server? What was the status code for the request? Which headers did the server return? Explain the purpose of each header.

nc -v www dot aalto dot fi 8080
host: www dot aalto dot fi
And it returns:
200 OK
Content-Length: 858
Content-Type: text/html
Last-Modified: Thu, 02 Sep 2010 12:46:01 GMT

I really don't know what does it mean. Question 2: Using netcat, nc(1), start a bogus web server listening on the loopback interface port 8080. Verify with netstat(, that the server really is listening where it should be. Direct your browser to the bogus server and capture the User-Agent: header "Direct your browser to the bogus server and capture the User-Agent: header" I don't understand this question.

View 2 Replies View Related

General :: Telnet 1000 Failed?

Jul 20, 2010

I have a temlnet problem -telnet 1004 failed.

At, "telnet" make connection successfully at port 23, however "telnet 1000" does not make connection at port 1000.

View 5 Replies View Related

Server :: HTTP Service Failed To Start

Mar 31, 2010

i am using RHEL5 at VirtualBox,at the time of installation i did create two partition one for / and another for swap.Now my /var directory is taking too much space and i decided to create a new partition with required size and mount that partition to /var.Now http service wont start and i did not reboot yet.

View 8 Replies View Related

General :: Wget Authenticated HTTP Connection Failed

Jul 7, 2010

we have a Red Hat server and I'm using wget in crontab to run some PHP scripts. We've been doing this for some time now and it's been working fine.I tried to add another script using wget to run a PHP script behind HTTP authentication. However, despite the fact that the URL works fine and the username and password are correct, we are getting Connection Timed Out errors each time. What might cause wget to work for unauthenticated URLs, but not authenticated ones?

I've tried --user=/--password=, --http-user=/--http-password and Username:Password@ in the URL and all three fail the same way. Here's the command in question:

[blahblah user]# wget -t 5 -O /dev/null 'http://Username:Password1!'
--2010-07-07 10:11:55-- http://Username:*password*


Again, wget works, the file with authentication works, but wget calling the file with authentication does not work.

UPDATE: Actually, I get the same timeout if I access the authenticated URL without authentication. Could that mean that Apache is rejecting wget requests for authentication outright?

View 2 Replies View Related

CentOS 5 :: GPG Key Retrieval Failed: [Errno 14] HTTP ERROR 404: Not Found?

Apr 20, 2011

I have a problem with GPG key, when I tried to run #yum updateI have got this errorwarning:rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID d05c057cGPG key retrieval failed: [Errno 14] HTTP eRROR 404: Not foundI used Centos 5.5.

View 10 Replies View Related

Ubuntu Servers :: Telnet Localhost 110 Says Trying ::1?

Aug 14, 2010

I am trying to set up postfix on my ubuntu server.When I try to login to the pop accounts through telnet

user@ubuntu1:/$ telnet localhost 110
Trying ::1...


View 3 Replies View Related

Ubuntu Servers :: Telnet Service Not Running?

Aug 27, 2010

I have telnet service intalled(apt-get install telnetd), but when I type telnet, I'm getting the following error:

bash: /usr/bin/telnet: No such file or directory

View 9 Replies View Related

General :: Automated Telnet For Testing Servers

Aug 20, 2009

So I have a script that is supposed to check to see if a mail server is up and responsive. What I want to know is how I can send it the telnet escape character. I've tried:VAR=`(sleep 5;echo quit) | (telnet 25 2>&- )`

This works BUT there is a problem as the mail server may have been accidentally firewalled off. If this happens, my automated checking script will hang. What I want to do is send the escape character so that the '>' prompt comes up. They I should be able to send it "quit" even if it is hung on not getting a response from the server. VAR=`(sleep 5;echo -e '^]';sleep 1;echo quit) | (telnet 25 2>&- )`

The above doesn't work. telnet interprets CTRL+] as '^]' but you can't type '^]' and get the same effect. So I guess what I need is to send the actual keystrokes. Like echo "somenumber" ; echo quit

View 4 Replies View Related

Ubuntu :: 2 Pptp Vpn Connections - When I Dial One Of My Vpn Connections, My Other Vpn Connections Be Disabled?

Feb 7, 2011

have a problem with my network-manager in ubuntu 10.10.when I dial one of my vpn connections, my other vpn connections be disabled and I can't use them!I tried to restart network-manager and gnome-panel, but it does't seem to solve this problem.

View 1 Replies View Related

Ubuntu Servers :: Can Connect Via Squirrelmail And Telnet But Not Through Mail

Apr 11, 2010

I setup my mail system on a clean install of Postfix and Dovecot from URl...on the:URL... part everything checks out yet when i input the details into Apple Mail it tells me That it Can't connect.I can Connect via Squirrelmail and telnet but not through mail.also my /var/log/mail.log s not recording anything and my mail.log.1 only goes up to april 6

View 2 Replies View Related

Ubuntu Servers :: Telnet After Upgrade - Receive Error

Oct 7, 2010

We have a sever on which we made an upgrade from Ubuntu 8.04 to Ubuntu 10.04

We use telnet to access from one local machine to another in our local LAN, but after the upgrade, when we try to connect to our server from a client on LAN we receive the following error:

Is there any known issue about problems in telnetd and Ubuntu 10.04?

View 1 Replies View Related

Fedora Servers :: Allow Users To Connect To Virtual Server Using Telnet?

Mar 9, 2010

I've a Windows 7 host OS and I've installed Fedora 11 as a Virtual OS using Virtualbox.I want a friend of mine to connect to my Fedora server using telnet from internet. What I would like to know is how do i configure my Virtualbox to allow my friend to connect to my server. Also, is there any setting I need to change in Fedora to allow this?

View 9 Replies View Related

Fedora Servers :: Able To Telnet To The Server Via A Remote Connection \ Will Not Accept Mail?

Feb 18, 2009

I am able to telnet to the server via a remote connection, but for some reason, it will not accept mail. ere is the bounce back email I am getting.Quote:This is the mail system at host'm sorry to have to inform you that your message could notbe delivered to one or more recipients. It's attached below.For further assistance, please send mail to postmaster.If you do so, please include this problem report. You candelete your own text from the attached returned message.The mail system

<>: temporary failure. Command output: pipe: fatal: pipe_command:
execvp /usr/bin/perlbin/vendor/spamc: No such file or directory
Reporting-MTA: dns;


View 11 Replies View Related

Fedora Servers :: Change The Http://localhost/ To Own Name?

Feb 24, 2009

how do i change the http://localhost/ to my owe name

View 1 Replies View Related

Fedora Servers :: Upload Something Via Http To MySQL?

Nov 18, 2009

I have a server (fedora 11 , LAMP). I want to know if I can upload something to my server via http (I mean from WAN),and this data stream can directly run into MySQL database . Do I need to write some special codes on my web page , or just change apache's configure file

View 7 Replies View Related

Copyrights 2005-15, All rights reserved