Server :: Reverse Mapping Checking Getaddrinfo For Failed?

Aug 28, 2010

I keep getting the error "reverse mapping checking getaddrinfo for fileserver.0.0.10.in-addr.arpa [10.0.0.10] failed - POSSIBLE BREAK-IN ATTEMPT!" in /var/log/auth.log I have a DNS (bind9) setup on my Linux router with the following config:

Code:
router:~# less /etc/bind/named.conf.local
// Local zone definitions here.
zone "0.0.10.in-addr.arpa" {
type master;
file "/etc/bind/db.0.0.10";

[Code]...

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Server :: PHP And Sendmail With External Mail Server / Failed Reverse DNS Check?

Jun 7, 2010

After searching the forum I could not find a clear answer to my question so I am giving it a try...

I have installed a LAMP server with Postfix as mail server. The scripts send email as user www-data using the mail server on the same machine.

However, the email got rejected by external mail servers (failed reverse DNS check) so I setup a mail server that meets all needed requirements.

Now I would like to use this second server instead of the mail server on the LAMP server. I found that this could be done with changing sendmail settings in php.ini (I think).

However I am not sure how that will go: www-data is no actual user on the new email server (which requires authentication before sending). Do I need to create a new user on the email server or change the settings in php.ini to match an existing user?

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Server :: Bind Reverse Zone : No Name With Reverse Lookup

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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Ubuntu :: Memory Mapping Failed. Error: 1?

May 26, 2011

So, I was working with Ubuntu 9.10 and I wrote a C program which was working just fine. Then, I have installed Ubuntu 10.10 and tried to run this same program again. However, I get the following error: Code: Memory Mapping failed. Error: 1 Part of the code has the following: Code: volatile ulong *memory;

int fd = open("/dev/mem", O_RDWR | O_SYNC);
if (fd < 0) {
printf("Could not open memory.
");
return(0);
}
code....

Does anyone have an idea what the problem could be? I do not know if there would be any significant change between Ubuntu 9.10 and 10.10 that could be generating me this problem.

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Fedora Networking :: Ssh Reverse Tunneling Failed?

May 7, 2011

I am trying to use the ssh reverse tunneling through the command

Code:
ssh -l login -p port <ip address> -R <remote port>:<local Ip>:<local port>

In order to enable some one in the remote host to connect my machine. through the command

Code:
ssh 127.0.0.1:<remote port>

However when I try to execute the first ssh command above I got the warnning

Code:
Warinning: remote port forwarding failed for listen port <remote port>

The problem always happens when the remote host I have tried to connect is my Fedora 14 machine. I can do that when using an Ubuntu as the remote host.

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General :: Pardus Upgrade Failed - PISI Terminates After Checking

Apr 11, 2010

I did an upgrade from pardus 2009 to 2009.1. When all the packages finished downloading and started installing, the power went off suddenly. Now my system is boots fine till the graphical login, but after I enter username and password, desktop fails to load and I am back at the login screen. I tried to resume the upgrade using (# pisi upgrade) but pisi terminates after checking the repositories. What to do?

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Networking :: Getaddrinfo() Apparently Not Working ?

Jan 18, 2010

I have an issue with cfservd, from the cfengine package not listening on both ipv4 and ipv6. Tracing through the source indicated that the issue was with the getaddrinfo() call. I have used the example code on the man page and can confirm that it doesn't work as expected on either Fedora 12, Fedora 10 or CentOS 5.3

The servers I am testing on have both ipv4 and ipv6 enabled and working. i.e. I can ssh to them using either -4 or -6 and netstat -a shows 0.0.0.0:22 and :::22

Running the example code on the Fedora servers results in only a single IPv4 address structure being returned by the getaddrinfo call and hence only listening on the one protocol. Strangely, on the CentOS server only the IPv6 address structure is returned.

I need both IPv4 and IPv6 for cfengine but am at a complete loss as to how to get it to work when the issue appears to be something fundamentally wrong at the OS level.

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OpenSUSE Install :: While Checking Xorg.0.log Found I810 Module Is Failed To Load?

Dec 15, 2010

I have installed suse 11.2. Sometimes while using (firefox, okular, open office etc) x server restarts & comes to login screen. While checking Xorg.0.log i found i810 module is failed to load. Is this causing the x server restart?

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General :: Nc -v Somehost.example.com 22 - Returns - Nc - Getaddrinfo - Name Or Service Not Known

Nov 24, 2010

I have this issue: "nc -v <ip-address> 22" works fine, but "nc -v <fqdn> 22" fails with error message "nc: getaddrinfo: Name or service not known". However, "host <fqdn>" works fine, so name resolution works. So I have a working name resolution, but nc (netcat) doesn't seems to be using it or something. Same kind of issue with "ping <fqdn>". Does anyone know how come name resolution works, but utilities such as nc and ping doesn't?

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Fedora :: Get The Message "IOMMU: Mapping Reserved Region Failed" 8 Times

Aug 4, 2011

System: F15-64bit, Intel Core i7 on Asus P6T mobo. I've upgraded to 2.6.40, and I'm regretting it!While 2.6.38 still works fine (apart from the usual random panics), 2.6.40 gives errors on boot, and reliably panics soon after login. Early in the boot I get the message "IOMMU: mapping reserved region failed" 8 times. Then boot appears to proceed as normal, at least once the nvidia blob is removed in favour of Nouveau (otherwise, forget it...).

After graphical login, the system freezes within a couple of minutes.After a text login, the system freezes within seconds with a panic, starting "BUG: Scheduling while atomic: swapper". A forum search for the IOMMU message leads to https://fedoraproject.org/wiki/Commo...IOMMU_handling but this talks about old 32-bit releases without BIOS virtualization support.

[Code]...

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Fedora X86/64bit :: Error Before Booting \ Error Message:IOMMU: Mapping Reserved Region Failed?

Feb 20, 2010

I'm a recently proud owner of a new Aspire AS3810T with Fedora 12 installed, when it boots up before entering the boot screen when it loads I see this error message:IOMMU: Mapping reserved region failedHow can i fix this error? It's quite frustrating

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Server :: Setup Reverse Proxy With Proxy_mod To Port 443 On IIS Server

Aug 30, 2010

We currently have a SUSE Apache2 reverse proxy server setup to reverse proxy (proxy_mod) our GroupWise Web Access server. Our SUSE box is located at www.domain.com. Our GroupWise Web Access server is located internally and is called GWMail. We are in the process of migrating from Novell to Windows, so we will have an exchange server with OWA access running on a Windows Server 2008 IIS7 box. That one will be called EXMail internally. Right now when someone goes to www.domain.com/gw/webacc it goes to the GWMail internal server from the outside world. This was all set up by previous techs who used Linux more.

We would like to set up reverse proxy to be able to reverse proxy to the Exchange Server from the outside world. Unfortunately the snag we are running into is that Exchange needs to run on port 443, and forwarding to port 443 has been a little tricky. I've read elsewhere we need to implement a generic TCP proxy, such as IPtables. what we need to do to get our SUSU Apache2 server to be able to reverse proxy to our Exchange server on port 443. For the save of argument lets call our SUSE server ExtranetServer. Below is our default-configuration.conf file's configuration:

[Code]....

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Server :: Squid Reverse Proxy Server ?

Jul 22, 2011

I have done configuration of webserver and i want it to pick some information from application server,but i don want people to see that application server,please can someone tell me in detail on how to setup squid reverse proxy server so that each time people want to access my servers they can just see one server,i mean one server must act as a loadbalancer to other servers,let say a sum of up to three servers.I am using redhat 5 servers with apache 2,and squid version that i have is 2.6.

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Server :: Mapping Apache To Tomcat

Jul 3, 2010

we have configured snv in our server but when we tried to access our svn folder from client its saying path not found error.This is because apache is mapped to tomcat so when we tried to access svn by default it looks to some other path and displaying path not found error.My question is how to restrict apache from forwarding its request to tomcat or else how to stop the tomcat service. I am using centos and i tried with /etc/init.d/tomcat5 stop but it is not getting stopped.

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Server :: How To Setup Reverse Proxyapache2

Apr 16, 2010

I have a scenario. A domain [URL] then there are 4 private computers on which applications are hosted at port 80. So when some one from outside access the site it should look as [URL] in apache2.conf where [URL] is hosted I added

Code:

ProxyPass /site1 http://192.168.0.2
ProxyReversePass /site1 http://192.168.0.2

is it correct ? I am able to see [URL] but when some one logs in from internet to [URL] it is redirecting to www.mydomain.com and not taking to page where a successful login will go
in [URL]what should I check or do ?

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Server :: Reverse Proxy Solution For SSH?

Jan 25, 2011

I have a server in a corporate data center for a project. I have an SSH access to this machine at port 22.There are some virtual machines running on this server and then at the back of every thing many other Operating systems are working. Now Since I am behind the data centers firewall my supervisor asked me if I can do some thing by which I can give many people on Internet access to these virtual machines directly. I know if I were allowed to get traffic on port other than 22 then I can do a port forwarding. But since I am not allowed this so what can be a solution in this case.

The people who would like to connect might be complete idiots.Who may be happy just by opening putty at their machines or may be even filezilla.I have configured an Apache Reverse Proxy for redirecting the Internet traffic to the virtual machines on these hosts.But I am not clear as for SSH what can I do.So is there some thing equivalent to an Apache Reverse Proxy which can do similar work for SSH in this situation.I do not have firewall in my hands or any port other than 22 open and in fact even if I request they wont allow to open.2 times SSH is not some thing that my supervisor wants.

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CentOS 5 Server :: 5.6 - Reverse Proxy With SSL

Aug 24, 2011

I've been struggling with this for a couple of days now. I'm trying to setup a reverse proxy with SSL. The config works when it's not using SSL, but as soon as I setup the virtualhost for 443, I get a ERR_CONNECTION_REFUSED in my browser.

The setup is that it's a CentOS 5.6 running Apache 2.2.3. I was configuring it via this guide: [URL]

This server is acting as a reverse proxy for a Windows server running Apache. Currently, I'm just trying to get the manager page from the Windows server to go through the reverse proxy. Here's the virtual host section of my httpd.conf file on the reverse proxy:

<VirtualHost *:443>
ServerName aspwebview.vtinfo.com
SSLEngine On
SSLCertificateFile /etc/httpd/ssl/star_vtinfo.com.crt

[Code]....

Thoughts? Is there anything I have to do on the Windows server (maybe in the connector section of server.xml)?

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Server :: Use The SAN Directly WITHOUT FibreChannel HBA Mapping / Mounting

May 9, 2011

recently we got a Dell/EMC DX300 storage I want to use it on a HP g4 with CentOS 5.6 and an Emulex LP HBA

* on the storage side the server is logged in, and registered with a RAID6 LUN (0)
* on the server side, the HBA driver (lpfc) is loaded & working

how can I use the SAN directly (WITHOUT multipath/powerpath/... -for first step/testing-)??? I don't have any associated device:

lsscsi:
...
[5:0:0:0] disk DGC VRAID 0226 -
nor in the /dev/disk/by-path or ../* folders

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Server :: Postfix - Domain To Single IP Mapping

Oct 26, 2010

I'm configuring a postfix server for the company I work for and have a question about limiting access by IP address.

First off, we're not using this for SPAM. We're a manufacturing/direct marketing company and will use the email server to contact our salespeople. We do not send UCE. That said, we have had problems in the past with our legitimate email being labeled as spam by a few carriers. This email server is being setup specifically to avoid future problems on that type.

Because of the nature of our business we operate several domains. We want to be able to limit outbound email for a given domain to a single IP Address. For example, say we have have 3 domains - a.com, b.com and c.com - and 3 IP addresses - 1.2.3.1, 1.2.3.2 and 1.2.3.3. We want to set things up so that a.com can only send out email on 1.2.3.1, b.com can only send out email on 1.2.3.2 and c.com can only send out email on 1.2.3.3.

My first impulse is to set these up as virtual domains on the Postfix server but I'm not sure that's the best method. Are there alternatives? What are your recommendations for doing this?

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Server :: Samba Permissions And UID Mapping Woes

Mar 15, 2010

So I am trying to setup a Samba server to share out our SAN environment to our windows clients. This is my first time playing with samba, so running into quite a few obsticals along the way.

Environment:
SLES 10.3
Samba 3.0x (Original RPMs in distro)

My end goal is to allow anyone in our Active Directory environment to access the shared folders from Samba and map the File permissions to 755 and Directory to 777.First I tried just using Kerberos client and winbind and added it to the AD domain. This worked, but mapped the wrong UIDs (the standard 10000 series). Also the permissions were mapped all wrong.Then I had the great idea to use the Server for NIS on windows 2008, it makes the PDC run a NIS domain that is conjoined to AD. This really didnt work at all. I loaded the AD schema with the correct UIDs and all that good stuff, but didnt seem to take.

So how would any of you approach this?Should I keep trying the NIS config, or use Kerb and winbind? Can a box be part of a NIS domain and AD at the same time?

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Networking :: Reverse DNS Pointer External Server?

Dec 9, 2010

I config a revers dns im my domain, but him pointer to external server. Check all dns, virtual servers and apache configurations and dont find where it pointer to out. I too check with:

# host -t ptr 4.204.120.64.in-addr.arpa

4.204.120.64.in-addr.arpa domain name pointer srv.businessconnection.com.br. Should point to another server, this no is the correct!

I make equal config another server and work very well, but in this are some erro. Somebody know what I doing wrong?

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Server :: Trying To Configure Apache Reverse Proxy

Oct 4, 2010

I have a question to masters of Apache. In my operating system (CentOS 5) I have installed two Apaches. One is Apache (port 80) from repository where I planning to configure proxy and second one is Apache integrated(port 8090) with KnowledgeTree software. The problem is that when I am trying to configure proxy reverse it simply doesn't work.

This is link to KnowledgeTree software:
- http://127.0.0.1:8090/knowledgeTree

This link I would like to rewrite with proxy like this:
https://myserver.com/knowledgeTree
(HTTPS dont forget)

In my ssl.conf in VirtualHost part I have created something like this:
Code:
<IfModule mod_proxy.c>
<Proxy *>
Order allow,deny
Allow from all
</Proxy>

ProxyRequests off
ProxyPass /knowledgeTree http://127.0.0.1:8090/knowledgeTree
ProxyPassReverse /knowledgeTree http://127.0.0.1:8090/knowledgeTree
<Location /knowledgeTree/>
ProxyPassReverse /
</Location>
</IfModule>

When I am trying to connect I see only: Unable to connect. Firefox can't establish a connection to the server at ifdocu.contaxt.biz:8090.

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Server :: Apache Reverse Proxy With MS Sharepoint

Mar 22, 2011

I am trying to configure a reverse proxy server that can act as a reverse proxy for ms sharepoint server that uses https. Usually when I accessed the sharepoint server at [URL], I will be prompted to enter active directory login. But what was "500 internal server error" and in error.log: failed to enable ssl support for 10.10.1.1 (sharepoint.mycompany)

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Server :: How To Configure Reverse Zone For X.x.x.x/18 Subnet

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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Server :: How Does ProxyPass (Directive / Reverse) Works

Jun 4, 2010

I want to know how does directive ProxyPass and ProxyPassReverse work. If I have an application on an internal webserver running on port 8080 on Lan but I want it to be accessible on internet via Server A which has public IP but firewall (which I do not have control blocks all except port 80).

Code:
Server A -----------------------------------------Server B
Public IP LAN
(Port 8080 blocked)
if I write
Code:
ProxyPass /application http://192.168.1.5:8080
ProxyPassReverse /application http://192.168.1.5:8080

Will the application be accessible outside. Or do I need to contact sysadmin to open 8080 in A in above diagram. Is there any other way to do the same in apache2.

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Server :: How To Install Nginx As Reverse Proxy

Jul 2, 2011

I want Install nginx As Reverse Proxy for Apache

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Server :: Squid As Reverse Proxy - Too Slow ?

Mar 16, 2011

I've been using squid-cache for a long time for authentication/authorization. It has work fine for years, but now it starts working too slow only in one computer (the others, works fine).

It's configured as a reverse proxy.

I see it can be a DNS problem, but the computer is configured with the same dns servers in resolv.conf that the other computers have.

I use squid 2.6.stable14 on RHEL 4.4.

If I restart the service (service squid restart) it works fine, but 15-20 minutes later, the problem repeats.

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OpenSUSE Network :: Tightvnc Server On 11.4 And Keyboard Mapping?

Apr 21, 2011

I use opensuse 11.4 with TightVNC Server version 1.3.9. I use french keyboard mapping (yast configuration).When I connect with putty via ssh all is ok (keyboard mapping). But when I use tightvnc viewer on windows the mapping is not correct.I've verified many time the configuration of the keyboard in yast (graphical) and desktop options (french mapping). I can't map correctly. It seem there is no issue with direct attached keyboard.Another strange behavior is the shift key. I want to use . (need to press shift + and this put a >. But sometime if I press "shift + ," before then "shift + ;" it works.

I've passed long time on google and find no answer yet.Is there a issue with tightvnc server ?A bug with tightvnc viewer ? (I've tried with realvnc and same results).

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Security :: ID Mapping In A AD Integreated File Server Cluster?

Feb 19, 2010

Posted in wrong section. Moved to Linux Servers Forum.

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Server :: NFS4 On Ubuntu Nobody / Nogroup User Mapping

Aug 26, 2010

So I have a few Ubuntu (Hardy till I can find a replacement for Xen) boxes that I am trying move from nfs3 to nfs4.I set it up according to this guide: URL...However I ran into trouble when the client see's all users/groups as nobody/nogroup.The current set up is that all the boxes have synced uids/gids and all users with root access can be trusted. I read some reports that said the only way this could be fixed was by using Kerberos. However I would really prefer not having to move to Kerberos as I have heard that it is very intensive to set up. So what I am looking for here is a solution other than sticking with nfs3 or putting everything on Kerberos. However if you think that Kerberos is easier to set up than I am giving it credit for then that could be useful to hear as well.

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