CentOS 5 Networking :: Authenticating Against Another Computer?
Jun 5, 2009
I was wondering if there is a way of doing this without some of the usual methods (Kerberos, XDCMP forwarding etc).
The problem is
- Computer 1 is busy
- user 1 only has a login for computer 1
- Computer 2 is free
- user 2 cant use it as they don't have login credentials for the computer as it is all done locally
I was wondering if there would be a way to forward a login request from Computer 2 to Computer 1 without the use of any proper authentication methods
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Apr 22, 2009
First, I'm extremely green with linux. I'm trying to configure my CentOS 5.2 box to authenticate my SSH users with my Active Directory. What would be the best way to go about doing that? I've configured Winbind and joined it the the domain but I'm not able to login locally or SSH with an AD account. I'm not sure where to go from here. Also my users will not be accessing any file shares on this box, SSH only.
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Mar 2, 2010
I hope this is the right place to post a Samba related question. I have 2 Windows Server 2003 machines acting up. In /var/log/messages of my fileserver (F10, Samba 3.2.11) I am logging these messages (log level = 10)
Code:
Mar 2 15:55:15 fileserver smbd[3768]: [2010/03/02 15:55:15, 0] rpc_server/srv_netlog_nt.c:_netr_ServerAuthenticate2(546)
Mar 2 15:55:15 fileserver smbd[3768]: _netr_ServerAuthenticate2: netlogon_creds_server_check failed. Rejecting auth request from client DATA-SYNC machine account DATA-SYNC$
[Code]...
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Jan 19, 2010
What I want to do is have two different networks connected with my switch. I want one computer to be the server and run dhcp with the ip address 10.3.2.1 and I want the other client machine to be 10.1.X.X. I want the X.X to be assigned automatically from DHCP running on the server. The subnet mask I believe should 255.255.255.0 for both networks. How can I get these two different networks to talk to each other when they are on completely different networks??
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Apr 28, 2009
And I'm currently working on a new CentOS 5 install I've made on a computer I've got.. So I'm now trying to get that computer to reach my home network through one of my other computers, which have got XP installed. I've configured the XP computer to act as a gateway from one network card to another, and It works with another XP pc, but no luck with my CentOS 5. I used this link [URL] And I configured the correct network card.
So.. the IP of the XP machine is 192.168.1.70, which I have set as a static. So that the CentOS will find it. And I've connected the (fully working) network cable correctly.
What do I have to do?
I have configured the CentOS to recieve an IP dynamically. (dhcp).. Might that be the problem? (well.. one of the problems.. I've tried to set it to static.. ...?)
Is there more to it than this? I mean when I'm working on communication through an XP machine... ?
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Jul 1, 2009
I have a server in my house with webmin and virtualmin installed et i made a mistake.Ive created a virual server and ive change the lan ip adresse. 192.168.2.30 ive change it for 192.168.2.31.Now of course nothing work. Im not able to connect via ssh via another computer.So, on the server i write ifconfig and it tell me the adresse is 127.0.0.1 and no more adresse like 192.168.x.x.
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Sep 3, 2009
I just moved into a new apartment and now connect via DHCP. Everything seems fine network-wise, except that when I'm at work I can't connect to the home box. (CentOS 5.3 x86_64) One thing I noticed is that I can't really determine my "true" IP address. What I mean is that it looks like my IP is 192.168.0.190, but when I use linuxdcpp, and enter a hub, I'm told my IP addr is actually something like 71.192.163.206. Here's some info:
[root@localhost cwatson]$ cat /var/lib/dhclient/dhclient-eth0.leases
option dhcp-server-identifier 192.168.0.1;
option domain-name-servers 192.168.0.1;
option broadcast-address 192.168.0.255;
[Code]...
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Feb 8, 2010
i have a linux server runnig oracle applications. i need to access this server from putty using ssh through internet. i did by registering my static ip with the dnydns.org and i am able to connect to the server. but now there is no security to authenticate any user as any one knowing the password can login to it.
i thought of configuring the firewall of linux server but the client ip`s are not static and they change continiously. so thought of keeping one more pc between the server and the router which will do the work of authenticating. but i am confuse as how to configure it to allow the packets coming from the internet after authenticating and to by pass the packets generated from internal LAN?
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Jul 2, 2010
i opened up my browser to surf the web and a page popped up i had never seen before.Apache 2 Test page powered by centos. Any address i put into my firefox browser won't come up and i'm stuck on this test page and,i can't locate it on my computer to remove it.How do i get rid of it and more importantly how did it get on my computer in the first place?
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Aug 18, 2010
I set up a dhcp server in the lan and assigned static ips to two computers, computer A and B, according to their mac address. Everything was running fine. But when I turned off computer A, connected computer C to the network, and assigned computer A's static ip to computer C without changing dhcp setting. Computer C was able to access the internet. When I turned on computer A, dhcp couldn't assign an ip address to it, and computer C showed an error message of ip conflict and failed to use internet. I wonder if dhcp server is able to prevent other computer from using the same static ip that is already assigned to a computer according to its mac address.
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Jan 7, 2010
how to set this up.. so far I have done the following:
Code: Step 1: Install the Required Packages
Note: Enter Y when asked if you want to install the additional packages
apt-get install krb5-user
apt-get install winbind samba
Step 2: Edit the /etc/krb5.conf File
[logging]
default = FILE10000:/var/log/krb5lib.log
[Code]....
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Nov 11, 2010
My wifes networked computer connected to the network just fine when it was Win XP. Now that Ive converted it to 10.04 (completely) it can see the network, but it just wont connect to it. I had no problem converting my computer to Ubuntu and it sees the network and accesses it great. Files, folders and hard drives are all shared. So, one computer connects great, the other does not.**I dont know what to do at this point.Here is the layout:My Comp (10.04) ---------......Main Network Comp (XP)Wife Comp (10.04) -------/The main network computer is XP as it has software on it we need that does not work in Wine. The main computer will have to stay XP. I cannot get my wifes computer to connect to the main system, although mine connects just fine. I dont know what the problem is. Her computer sees the network, but when trying to connect, it times out and says unable to connect.
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Jan 24, 2011
Can connect to our mail server using telnet onto port 25 and this works correctly, 'ehlo whatever' shows output as expected.
However using a mail client to connect it gives an authentication error and the following appears in the maillog file;
did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
what to look for in the config, this works correctly on our development box but not on our production server. Could it be another program is interfering with the connection?
Sendmail is running in standalone mode not through the xinetd daemon.
I am using the PLAIN AUTH method as to try and avoid getting more errors.
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Jun 14, 2011
All of sudden a working SAMBA server not allowing to login and deny permission for users to access it shares. When I check I checked the server directory rights are same, find no changes. and smb.conf is also same. when I checked closely I found the following error.
1. smbd.log show the following messages
[2011/06/14 16:07:15, 0] lib/util_sock.c:get_peer_addr(1232)
getpeername failed. Error was Transport endpoint is not connected
[2011/06/14 16:07:15, 0] lib/util_sock.c:read_data(540)
read_data: read failure for 4 bytes to client 0.0.0.0. Error = Connection reset by peer
[2011/06/14 16:07:36, 0] lib/util_sock.c:get_peer_addr(1232)
getpeername failed. Error was Transport endpoint is not connected
[2011/06/14 16:07:36, 0] lib/util_sock.c:get_peer_addr(1232)
[Code]...
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Apr 2, 2011
I am configuring a new ubuntu nis client and have all the configuration files exactly the same as existing clients (nsswitch.conf, passwd, group, host.conf, hosts, yp.conf)
The new client returns a dump of the passwd file with a "ypcat passwd" command. ypwhich returns the correct domainname. Ypmatch seems to work as well but the client won't authenticate!
NFS is mounted and I can see home directories
The debian server is working fine with existing clients.
Could this be an issue with running updates on the new client?? could debian and ubuntu be not getting along.
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Sep 10, 2010
I have two Linux computers and one small home router with DHCP functionality. I configured the router with the "dynamic DHCP" setting, ie, the static DHCP with MAC-Address was not used. Before that, I used the manual IP configuration, defining the two computers' names in the /etc/hosts file.
Example:
10.0.0.2 comp2
10.0.0.3 comp3
Now, with DHCP, the above example is no longer appropriate, because the DHCP server is supposed to tell the computer what IP number it will receive. However, I am missing something, because I haven't figured it out yet how to make one computer know the other computer's name. Is it that I haven't installed a name-finding package? Is there a simple way to accomplish this (one computer finding the other computers' names)?
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Sep 21, 2010
I have ubuntu server installed on a pc. The motherboard died, so I switched the HD to another computer. Everything is fine except the network. I cannot access this computer from other computer (while it was possible before). I looked at the interfaces and everything seems fine. The nic itselft seems to work too.
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Jun 7, 2010
i want to find ip address of other computer which are connected in LAN..suppose ther are 5 compter in LAN and i want to find ip of all remaining 4 computer using my computer only in command or any other way is ther....
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Apr 4, 2010
I don't know if the problem is the way I create my shares on the Domain member, but here is the way I've configured my systems. My systems are home based, and though the topology may be all wrong, it's set up this way only for test purposes. I love to get things up and running.I've already had a Domain Member running under Samba 3.02xx (Centos), but I'm having problems under Ubuntu and Samba 3.40
Server call Citadel is a VMware Server. I've got 3 virutal machines on this Server, 2 Ubunt 9.10 servers, and 1 Windows XP pro. One of my virtual servers is call Winserver, a Samba PDC server using TDBSAM as it's backend. Configured and working well. I have a share that I can access.On my Windows XP, I'm a domain member, able to access my WinserverServer share "Linux Doc", but when I try to access my domain member, it keeps asking me to login.
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Jul 18, 2010
I have two ubuntu 10.04 64-bit servers running samba (3.4.7) and openLDAP (2.4.21). The LDAP directory is successfully replicating between the two servers. These servers also serve as LDAP servers for sudo, pam, nss, and other services for a dozen servers without issues. The BDC samba is configured to use itself for LDAP. I connected to the BDC using the samba ldap credentials and verified I could a) see the Computer object b) read NTPassword and LMPassword. The workstations can authenticate to the domain successfully against the PDC. If a workstation boots and connects to the BDC, they login fails with:
Code:
[2010/07/18 11:46:23, 0] rpc_server/srv_netlog_nt.c:336(get_md4pw)
get_md4pw: Workstation MACHINENAME$: no account in domain
[2010/07/18 11:46:23, 0] rpc_server/srv_netlog_nt.c:584(_netr_ServerAuthenticate3)
_netr_ServerAuthenticate3: failed to get machine password for account MACHINENAME$: NT_STATUS_ACCESS_DENIED
Successful authentication against the PDC shows:
Code:
[2010/07/18 11:59:20, 1] smbd/service.c:1063(make_connection_snum)
MACHINENAME (192.168.2.145) connect to service netlogon initially as user username (uid=30000, gid=512) (pid 1727)
[2010/07/18 11:59:20, 1] smbd/service.c:1063(make_connection_snum)
MACHINENAME (192.168.2.145) connect to service data initially as user nobody (uid=65534, gid=65534) (pid 1727) .....
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Feb 13, 2011
So If I open Upgrade manager it says that I need to do a partial upgrade for some reason, so I click partial upgrade, but then I end up with this error:
Error authenticating some packages
It was not possible to authenticate some packages. This may be a transient network problem. You may want to try again later. See below for a list of unauthenticated packages.
And this list of packages:
acpi-fakekey
acpi-support
acpi-support-base
acpid
adduser
alsa-base
alsa-utils
apache2
apache2-mpm-worker
apache2-utils
apache2.2-bin
apache2.2-common .....
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Mar 5, 2010
after doing a partial yum update and configuring cyrus and installing splunk my server box is not logging in to any of the users i have setup on it.to setup the cyrus server i used pam authentication so my assumption it could be that or somthing with the splunk install which i left default to /opt/.im running an old kernel i think its fc11 29 .pae in my boot logs i dont see that anything failed to run but it still does't let me logonk
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Oct 18, 2009
I have been following the steps mentioned at [URL] Now I want to add authentication through .htaccess.
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Jul 1, 2010
I have LDAP server, it is configured and all is very well, I use it to make some authentication for our Servers and routers. Also I integrates LDAP with Radius and all is work, so LDAP is powerful to the company. Last week my manager ask me to try making these authentication for all of Company computers which is windows. So, can I use LDAP, or Active Directory? I wish to use LDAP.
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Nov 10, 2010
I'm trying to write a script in Perl to download a file that requires NTLM authentication to access, stored on a machine on this network.The file exists, and can be accessed through a web-browser, btw.
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Jan 1, 2010
I downloaded the vnc 4.1 on my linux computer which is running Ubuntu I'm not sure how to view it on a windows computer. I really have no idea what i'm doing so can anyone that answers please add as much detail as possible.
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May 8, 2009
When I try to install software updates by clicking on the red arrow "update" button, I get a final result stating the following:
Error authenticating some packages
It was not possible to authenticate some packages. This may be a transient network problem. You may want to try again later. See below for a list of unauthenticated packages.
initscripts
libavc1394-0
libtiff4
sysv-rc
sysvinit-utils
I've tried this a few times...same result over the past 10 days.
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Jul 25, 2010
I am trying to setup my opensue 11.3 server as a pdc using openldap and samba
I am continuously getting a network path not found error message on my windows xp box. I already verified that the network settings are good.
# smb.conf is the main Samba configuration file. You find a full commented
# version at /usr/share/doc/packages/samba/examples/smb.conf.SUSE if the
# samba-doc package is installed.
# Date: 2010-07-05
[global]
[Code]....
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Feb 2, 2010
I have a problem with sendmail. I am using the zen.spamhaus.org dnsbl, and it is doing a wonderful job of blocking incoming spam from open relays. But it is blocking my users who are on a dynamic ip range from any isp remotely. They should be able to authenticate and send messages no matter where they are as long as they authenticate right? I just want to use the blacklist to block incoming mail to my server that is being distributed to our email addresses.
I want to block people that are hosting mail servers and sending mail to my domain from isp sub-nets. But I don't want to block my users that are sitting on isp subnets using their mail client to authenticate over smtp and send an email from my mail servers.
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Mar 3, 2010
I need to set up ssh/sftp/network shares all authenticating with AD. I want to use likewise to do the auth, but to mount the network shares I need to use an older version of samba so it can connect with likewise.How can I go about installing an older version of samba onto this new distro of the OS? I've tried installing the lenny and etch versions but I always get an error during install just saying that samba errored.
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