Networking :: Fetchmail Attempts To Deliver To Non-existent Users With Localhost As Domain
Feb 27, 2010
I'm using slackware 13.0, 32-bit with sendmail, fetchmail, procmail and mutt.This is a recent install of slack, for several years, I have used a similar configuration on ubuntu, but with postfix as the MTA instead of sendmail.My system has one user: tim. Email sent to me at any of my email addresses that have 'tim' has the host component, are received, but along with that delivery is the delivery of an error message. Below is a copy of such a delivery.
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Sep 30, 2010
I have one centOS 5.5 box recieving mails done by fetchmail service and it has a 5 client pc's,is there any way that the CentOS box able to deliver the mails to the 5 local network users that is using thunderbird as MUA.the mails is stuck in /var/spool/mail as I verified in the webmin sendmail settings
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Sep 30, 2010
I have one centOS 5.5 box recieving mails done by fetchmail service and it has a 5 client pc's,.is there any way that the CentOS box able to deliver the mails to the 5 local network users that is using thunderbird as MUA. the mails is stuck in /var/spool/mail as I verified in the webmin sendmail settings
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Sep 30, 2010
I have one centOS 5.5 box recieving mails done by fetchmail service and it has a 5 client pc's, is there any way that the CentOS box able to deliver the mails to the 5 local network users that is using thunderbird as MUA.
the mails is stuck in /var/spool/mail as I verified in the webmin sendmail settings
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Jul 23, 2009
I used Zimbra since a week ago to my centos 5 server, but now I'm using google apps. Today I tried to uninstall Zimbra and restore sendmail, but when I try to send a mail to local domain, it responds with an unknown user message and don't deliver the message to google mail.What I forgot in reconfiguration?
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Jul 31, 2010
I have a server with a static IP that I use as a sendmail server. The problem is that port 25 is exposed. As a result, anybody can login to the SMTP server and send mail from my domain as a user that does not exist as well as email from other non-existant domains. I'm sure there are sendmail options that I can enable to do some checks, like if the user exists on that server or if the domain is the same on the server, etc. I was wondering if you guys can mention a few that I can add to my sendmail.mc file?
I have thought about auth login, the problem is if auth login is on my public port then I won't be able to receive email from gmail because it would be unauthenticated. Also, I only have 1 mail server. I know the ideal solution is to have 2 mail servers. One for outgoing mail/internal mail server where you can enable auth login and the other for incoming mail which just acts as the relay to the internal mail server. That way spammers can't login to send mail out. That's another question I had, how do I configure sendmail to only send email out/in?
Anyhow, so I have to make do with 1 mail server for now. So I decided to add a few rules on iptables. I grabbed the IP range that gmail uses when I receive mail from then and added it to my iptables with the following command.
[Code]....
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Oct 24, 2010
I have setup the fetchmail as below:
Code:
poll domain.com
proto pop3
via domain.com
user "user@domain.com"
pass "123456789"
is user@domain.com
keep
no fetchall
When I try to login it gives the following message:
Code:
fetchmail: 6.3.8 querying domain.com (protocol POP3) at Sun 24 Oct 2010 10:51:52 AM EEST: poll started
Trying to connect to domain.com/110...connected .....
fetchmail: domain.com: upgrade to TLS succeeded.
fetchmail: POP3> USER user@domain.com
fetchmail: POP3< +OK
fetchmail: POP3> PASS *
fetchmail: POP3< -ERR Authentication failed.
fetchmail: Authentication failed.
fetchmail: Authorization failure on user@domain.com@domain.com
fetchmail: POP3> QUIT
fetchmail: POP3< +OK Logging out
Although I'm able to login to the webmail of my domain.com cpanel with the same username and password, please note also that it some time working smoothly and most time it gives login authentication failure:
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Feb 3, 2010
At work, we run Windows... Windows domain, windows workstations, etc. Today my boss asked me my thoughts on running an Ubuntu lab within the mixture of our existing Windows setup.
Well, that brought several questions to mind. So I understand you can bind an Ubuntu computer to a Windows domain, seems easy enough, whether you do it through Samba or the other guide I read that I kind of forget at the moment, but anyway...
I was just curious how Ubuntu interacts with domain users when on the windows domain. For example, if we have an Ubuntu machine on the Windows domain with a local user "administrator" and that's it, would any domain users be able to log into the Ubuntu work station, similar to how it is on Windows?
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May 13, 2010
The company I work for, as usual, is Microsoft-centric. I'm attempting to integrate my Ubuntu server into the domain to allow domain users to authenticate to the server and access file shares using Samba. Here's my current configuration:
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Oct 25, 2010
When i try to login with AD credentials on Ubuntu 10.10 and the user has is password almost expire, the gdm hang and display the message "your password will expire in ... days"
If i login with any other user without that restriction, it works flawless. does anyone know what configuration file i need to change to bypass that problem.
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May 27, 2011
how to map all domain users form group Domain Users to local group users (and maybe some more)? Im using Ubuntu 10.04 x32. Its connected to my domain using Samba and Winbind, I can login using my domain credentials, automatically map user folder form DFS server, but I think that domain users have too much priviledges in the system and want to restrict them as much as possible
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Jul 17, 2009
Filter access server through the net only to authenticated users from domain controller (Win2k). Server (Centos)(Firewall with 2 nic), which makes access to the net, with only 196MB RAM (PIII500Mhz), so I do not want a solution based on proxy or what resources it uses large I want a solution with a script that runs at login on windows this check series HDD and to communicate with Linux server that's open accessor another simple solutionNow just use only MAC filtering on
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Jun 1, 2010
I have a linux test machine which I would like to run a copy of a production webserver. This is a legacy application which does not use a property file for its server name. Throughout the application, the server name is hardcoded (example: open connection to myServer.myCompany.com).
Is there any linux trick which I can use to redirect all requests for a certain host back to localhost? I know in Windows that I can add an entry to the hosts file and have it redirect back to localhost. How do I do this in linux?
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May 27, 2011
we have installed the Centos on my server and configured the postfix with our domain [URL] as example. If I send any email through squirrel email, Emails are going from [URL] instead of [URL].
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Sep 27, 2010
i have a windows domain and linux ftp server. OSs windows 2003 server and centos 5.5. i would like to integrate this file server to windows domain. And would authenticate users from windows domain.
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May 15, 2010
I have installed Fedora 12 OS which is using kernel 2.6.32.11-99.fc12.x86_64. I am using a Linksys WMP600N Wireless-N PCI Adapter with Dual Band card which has a Ralink chipset. I have installed the latest rt2860 driver which uses the 2.6.32.11-99.fc12.x86_64 kernel. If there is any other pieces of information that is need I can provide it.
Problem: I can use either the Ethernet connection which is built into my ABIT mother board or my PCI wireless card. My Ethernet connection works perfectly however; my wireless card comes up attaches to my wireless router; that's it. There is a strong signal, the WPA2 security password works correctly. I am able to ping my loop-back address and my DHCP IP address for my wireless card but I can not ping the router or anything outside of my box.
If I let the ping program run for a while and allow it to try to ping the router, after a period of time ~5minutes or so I will get several hits and then stop. The firewall does not change from my Ethernet connection to my wireless connection. The Wireless connection is a trusted interface in my firewall specifications. Questions/Thoughts:
Can I use the same OS provided routing table for my Ethernet connection for my wireless connection? Would the OS know which port to use by switching to a wireless connection (after reboot)? Do I need to somehow switch or bridge the port? Is the wpa_supplicant playing with my connection and opening it up and then shutting it down? Below are some netstat data: routing, interface table, statistics, and dmesg on the kernel driver rt2860.
[Code]....
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Oct 26, 2010
I use an application that encapsulates IPv4 packets in an IPv4 tunnel using the TUN/TAP driver in Linux. There is a fancy protocol used between the 2 layers. This software works like a charm.
I have started modifying the source code in order to send IPv6 packets in an IPv4 tunnel. So far, the software seems to work fine but the information (packets) does not seem to make their way back to the user space.
I initiate an ICMPv6 packet with ping6. It gets in the tun0 interface. The software makes the IPv4 encapsulation and sends the information out of the system. The ICMPv6 echo reply comes back to the system with the corresponding encapsulation. The software removes the encapsulation and writes the packet in the tun0 interface. The ping6 application never receives ICMPv6 echo reply.
I have confirmed the integrity of the transaction using tcpdump on the tun0 interface. The interface comes up with the "inet 6 addr" only. The interface has the flags "UP POINTOPOINT RUNNING". The RX/TX counters are incrementing and no drops are observed at the interface level.
How can I troubleshoot this problem? There seems to be a lost link between the tun0 driver and the user space applications. The system uses SuSE Linux Enterprise 10 SP1. This is based on kernel 2.6.16. This is quite old.
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Sep 21, 2010
I want to set a log off script for samba domain users. Actually I am facing a huge temp files related problem. So I want to set a batch file which will run when domain user log off. When user logout then batch file run and delete all temp files.I have already set batch file local group policy and it works for me, but I wants to set it from server side.
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May 4, 2010
I have server 9.04 and joined thru winbind to Windows Domain and subversion installed.Windows AD users can use their own credentials to join and everything is working fine.However the group svn which is used to access the repos in /etc/groups has some users.However I would like to add the domain users group to the svn group but the domain users contains Space. And /etc/groups does not happend to read the space any ideas on how to add "domain users" to the svn group in /etc/groups
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Jun 23, 2010
I need to configure LDAP and connect it to Microsoft Active Directory 2003 SP2 to manage my RHEL 5.5 with Microsoft windows Domain
At this point I'm able to query MSAD (getent passwd/group lists all the users/groups from Domain as well as local)
Also Kerberos authentication is working (kinit user is working and klist are returning expected results)
Now my problem is that I cannot ssh into the RHEL box with any of the Domain Users even though I can see those account in getent results.
My first question is if everything is ok with my system-auth configuration file (I'm not sure if all is needed and in right order):
auth required pam_env.so
auth required pam_tally.so deny=5
auth sufficient pam_unix.so nullok try_first_pass
[Code]....
How to add Linux server computer account to MSAD Computers CN without using SAMBA ?? From what I read kadmin should do it but not sure how to do it
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Jul 21, 2010
I don't know if this is possible... I want that only some of a Windows Domain(Samba) users can to logging in a machine.For example: The user Peter of the domain WORKSPACE can connect to the PC1, but the user Charly of the domain WORKSPACE can not connect to the PC1. How I can implement this?
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Jul 25, 2011
Currently, I have configured a email server as primary email server Backup Email server is in my ISP and store all email in a mailbox.
configure my primary email server to connect to my ISP server and fetch all email from there and distribute to local user's mail box.
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Feb 3, 2011
Im currently using an english book to setup my samba server, and im having problems understanding it.
I dont want to use root to join clients to the domain; i prefer creating a plain user.
Ok, so, the steps i follow are:
net groupmap add unixgroup=srvadmins ntgroup="Server Admins"
net groupmap add ntgroup="Domain Admins" unixgroup=dmnadmins rid=512 type=d
net rpc rights grant 'ORAServer Admins' seMachineAccountPrivilege
This way, i have a group called srvadmins with permissions to join clients, a group called dmnadmins with permissions to manage users and other permissions, and root.
Now, users: "root", "dmnadmin"(from dmnadmins group) and "srvadmin" (from srvadmins group) can add machines to domain. Root because is root, srvadmin because i granted permissions, and dmnadmin because is admin
So i wonder, why srvadmins group is needed to be granted privileges?
I tryed to lower dmnadmins privileges by revoking semachineaccountprivilege privilege, but didnt worked
net rpc rights revoke 'ORADomain Admins' seMachineAccountPrivilege
looks like its privileges comes from another group and it user managed to add a machine to the domain correctly.
Ok, so, is this really usefull? why do i need 3 kind of users to be able to join to the domain?
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Nov 12, 2010
Have recently setup Samba on a fresh install of Fedora 14 so that I can use it as a workstation in a Windows 2003 (win2k3) domain.
The install of Samba seems to have worked as I can connect to the Domain using ADS and kerberos. selinux and firewall have been disabled until I have it working 100%
The problem lies when i try to login to Gnome or TTY. It begins to create the home directory for the domain user logging in but after a certain process Fedora logs the user out of the system.
Have looked through several log files (/var/log/messages, log.winbindd, log.winbindd-dc-connect) but am unable to debug it any further.
Have posted the config files below which shows the Fedora machine is successfully connected to the domain as it lists its groups, users and validates logon credentials - it just won't logon!
Where i can go about debugging. Also if you need additional configs.
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Feb 27, 2010
I am using Unbunto desktop and installed "likewise open" so that my linux client can access windows active directory(join the domain). On server side i have windows 2003 server. On windows 2003 server in active directory i have assigned each user a disk space. I have sucessfully joined linux (ubunto) box to the active directory domain but my linux box has access ($ it can use) to all other user diskpace ( they can browse other users) and when i joined windows xp client with the same server it works properly( xp client cant access or use other diskpace)
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May 20, 2010
I have Ubuntu server 10.04 joined to a domain using Likewise Open. I can login using my domain credentials and have added my domain account to the sudoers file. Now that I've got it joined to the domain I want to add some samba shares and have domain members use their accounts to access them. However, no matter what combination of my domain name and the domain user or group I use in the valid users field it won't let me in. What's the proper way of inputting a domain user or group in the valid user field?
This is the entry I'm using for the share:
Code:
[testshare]
path = /srv/testshare
valid users = @"Domain Name+Domain Group" (Have tried many things here)
public = no
writable = yes
printable = no
create mask = 0765
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Oct 18, 2010
Im an IT manager for a small company with a small ammount of users. We already use linux for our data server and I would like to implement a domain controller. All of our user machines are WIndows XP pro.
Ive been reading up on using OpenLDAP as an alternative to active directory.
What I want is just a simple active directory like server, with a GUI if possible.
What do I need to look at and how would I go about setting this up? Im fairly proficient with Ubuntu already, I just need to be pointed in the right direction.
Is it even possible to have my windows users be able to log in to their machines using an ubuntu domain controller?
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Mar 27, 2010
Why is it that the darn printer keeps breaking on this thing (Ubuntu) ??? It's either every damn update that keeps messing this up. One computer is bad enough, I can't imagine having to take care of even five with this thing always screwing something up. What the hell is going on??? Yeah I'm tired of this thing always messing up the printer. Please fix this thing, separate the browsers if you have to, do whatever it takes, but please STOP messing up the printers...and I don't even print that often.Oh yeah, when you first start the OS up, the drive seems to go on for a while longer now. I only put the regular updates and don't tweak anything.
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Feb 17, 2011
I am trying to write a little port knocking daemon that needs to see every failed connection attempt on every port on the system. The primary way to do this (as the Wikipedia page points out) is to monitor the firewall log file. I am using UFW and reading its output in /var/log/kern.log. Typically, when UFW blocks something, it prints a little line like this:
Quote:
Feb 17 10:42:42 serin kernel: [323588.279588] [UFW BLOCK INPUT]: IN=eth0 OUT= MAC=00:0b:e6:00:85:96:00:09:5b:9f:41:a4:08:00 SRC=192.168.0.4 DST=192.168.0.8 LEN=60 TOS=0x00 PREC=0x20 TTL=49 ID=46945 PROTO=TCP SPT=56849 DPT=1723 WINDOW=5840 RES=0x00 SYN URGP=0
But it seems that whenever UFW experiences a significant "load" (my client sends eight packets over the span of about 25 seconds, not too significant if you ask me), it just kind of "gives up" after 10 or so attempts. Log messages stop appearing in kern.log. I know the packets are coming; wireshark confirms this.
It seems to me that a buffer of some sort is filling up, because if I give the system a breather and try sending my sequence again in, say, three minutes, it prints log messages for 10-12 straight attempts before giving up again. I've tried sending packets at longer intervals and reading from other logs like /var/log/messages, but none of this has helped. Does anyone have any idea why UFW would fail to log all blocked connection attempts?
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Mar 2, 2010
Since yesterday Firestarter has been prompting me that it is blocking external connection attempts as shown in the picture below:I'm not even going to bother covering the IP addresses because I personally don't see why I should care but as you can see, there has been loads of them attempting to connect to ports 3674 - 3675. I ran nmap 127.0.0.1 and it came back as 631 being the only one open. So then I thought maybe lsof -i would mention much more but all it shown was:
@boris:~$ cat meh
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
cupsd 1644 root 5u IPv6 14329 0t0 TCP localhost:ipp (LISTEN)
[code]...
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