Ubuntu Servers :: Local Users Are Sending Mails Through Ms Outlook Using Local IP?
Jul 26, 2011
I have a postfix mail server on ubuntu 10.04 lts behind a router. so all local users are fetching/sending mails through ms outlook using local IP. Sometimes when internet goes down and any mail send then it bounced back immediately saying domain not found. Can u please tell me how i configure to hold all mails in postfix server rather than bounce when internet fails and will pass through when restored the internet around 15-30 minutes?
We are facing an issue with virtual users. We have configured postfix in Fedora 12. We are able to receive as well as send mails for the main domain users (i.e. example.com) but not able to receive virtual users mail (i.e. configured example2.com in main.cf and configured in virtual file as systems@example2.com useronly). We are receiving error message in outlook as 0x800CCC0F. Please guide us how to solve this issue.
I have configured dns, postfix, dovecot, https, squirrel mail on fedora11 everything working very well. While configuring out look the same domain users getting mails the virtual users not receiving mails it showing pop3 error. But he can able to receive mails in his home directory.
I'm using vsftpd as my FTP server. I have set it up so I can access my home directory via FTP, requiring my login.
But I want to make a folder in my documents (or anywhere really), which only my colleague can access. But I don't want to make a local Ubuntu user account. He just needs to be able to send files to this folder, connecting remotely, using his own login details.
I have a mail server running Postfix and the problem I'm running into is that when trying to send mail, I get a "relay access denied" error.Inside my main.cf, I did not specify 'smtpd_recipient_restrictions' so by default, the variable is:
Code: smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination The 'mynetworks' variable looks like this:
I found 2 previous posts, one from 2005 and one from 2006. The 2005 post was not very helpful and the 2006 threads are not exactly what I was expecting. So I wanted to ask the question to be sure. I have already stood up the new fedora 12 server. The old server is also fedora 12. I need to migrate local users and sendmail mailboxes. In the past couple of years the environment was small enough to create a copy of the users and then have the users mail themselves, but I want to start migrating users/mailboxes properly.
On a unix level I am a jr admin, but I have extensive senior level experience as a windows engineer and network engineer. I do feel comfortable with using the unix command line, but usually operate the unix systems thru webmin because I am not familular with more complex commands. Ideally a software solution to migrate users and/or mailboxes from one server to another is what I am looking for, but in leiu of a software solution I still need to migrate user accounts and their mailboxes. LDAP is not in place, but if the process becomes easier with LDAP I am willing to do what is needed to set up LDAP. (I have no previous experience setting up LDAP)
I do not want to change my mail server from sendmail to different software. At least right now. Both systems are up and running. They can connect to each other via public ipv4 address' only. The new server has already been installed and configured with all the software to match the old server. How do I migrate users and sendmail mailboxes from one fedora 12 server to another fedora 12 server?
I want to send mails to anyone in my local network. I have 20 machines with domain [URL]. I have installed sendmail in my machine with name [URK]. in /etc/sendmail.mc i had comment the DAEMON_OPTION line i redirect it to sendmail.cf restart the service.
I had mentioned the hostname entry in the host file of each pc.Iam able to send mail to all users in my pc. But I want to send mail from server1.example.com to station2.example.com,station3 etc. When I send the mail, it wont reach at the client side.
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
|eth0 (a.a.a.a) | Linux PC |<----------------> | ROUTER |eth1 (b.b.b.b) | |<----------------->|
the linux machine has two interfaces eth0 (a.a.a.a) and eth1 (b.b.b.b) connnected to two interfaces of a router. Now that if I send any packet destined to b.b.b.b from a.a.a.a interface on the linux machine, it should take the folowing path: eth0->router->eth1 . and it should be the same for vice versa.
i am using centos 5.4 (5.5?) gnome on multiple machines in a local network.is there a program available that does the following:you type a message in a 'note'screen on one computer and can send it to one (to choose) or all machines in the local network that are online, so you can read the message on these other machines screens.
am using qmail and have webmin, all is running smoothly, but i have users spamming other staff accounts.The question: How do I block a user from sending out mails but still able to receive mails. Just denying access to sending mails?if anyone can guide me to do it via terminal as well as webmin.Why webmin you ask, because I have tried it once it works but sadly it block both incoming and outgoing mails.
I'd like a way to see all of the devices on my local network and what their local IP address is. I recall that I used wireshark to troubleshoot a similar problem a while back, but it doesn't seem to have a way to see all of the devices- only the traffic. (I'd like to do this without having to physically interface with my router if possible, and I am in an encrypted network if that matters)
I have installed a web server on my local network. Everything is well configured and web pages are shown correctly from Internet (outside the local network) using the domain or the public IP.The issue is if I try to see that web pages (using the domain or the public IP) from inside the local network. In that case the router config page (192.168.1.1) is shown instead of the web pages.From inside the local network I'm only able to see the web pages using the internal IP address (192.168.1.XX).
I want to have a shared area for movies, music, etc. where files are available for all users. What is the best way to do this? I've tried a few different things, (ie. creating a folder and sharing it among a group, but for some reason it doesn't seem to work the way I want it to. I'm now thinking maybe have a partition like /share and set the permissions to all in fstab, but I'm not sure.
I am stuck in a weird situation and could definitely use some help from gurus in security area.
I have categorized my users into 3: 1. root user 2. other local users 3. LDAP users
I want to setup following 2 usecases:
a) 1. Allow keybased ssh and scp to root users 2. Allow ssh but disallow scp service to other local users 3. Disallow ssh and scp to LDAP users
b)
1. Allow keybased ssh and scp to root users 2. Disallow both ssh and scp to other local users 3. Disallow ssh but allow scp to LDAP users
For the 1. in both cases, I think PermitRootLogin in sshd_config could . For the 3. I am thinking of deploying rssh to control scp service access, since ssh will be restricted anyways.
Problem area is 2. primarily.
i) How to allow ssh but disallow scp to 'other local users' ii) How to disallow both ssh and scp to 'other local users'
One of Konqueror's unique features is that i can name a local process as the action in a form. When i submit that form, the local process is executed. Very helpful for certain offline tasks. What would make it even better is if i could find a way to pass some data to that local process from the html page. This could be the content of a hidden input item, etc. Alternatively, if there is a way for Konqueror to create or update a local file with data from the html page, that would acheive the same end.
I have an RHEL 5.3 system where NIS logins are working perfectly, but authentication doesn't seem to be working for non-root local users. I can't login either remotely or at the console with a local user, and I can't even su to them unless I'm doing so from root (i.e. when no password is required).
I've reset the password, I've deleted and recreated the user, and nothing. nsswitch.conf does have "files" listed as part of the config, which was really the main place I'd have assumed the issue could be. su gives "incorrect password", and ssh gives "userauth failure". /var/log/secure shows "su: pam_listfile(su:auth): Refused user <username> for service su", and same for the ssh attempts (with ssh in for su, of course). I've reviewed my pam.d files, and they seem to be the same as on a working machine, but I'm not 100% conversant with pam so I might be missing something.
What command would you use to read about the sync system call (not the sync command)? How would you read a local man page for sync that was kept in the /usr/local/share/man?
I am trying to install tilp, a program for the link between a computer and a Texas Instruments calculator. I have downloaded all the packages to a local directory. I tried telling yum to install all the packages at the same time, though, the dependencies still fail to resolve (though they are all in the directory). I don't know if it would be safe to force install without the dependencies (even though I would install them later).
I remember back when I used Windows, there was a shell command call "net view", which would allow me to see all the other users on my wireless net.
Is there any command or application that can do this? I dont mind if it is a terminal command either, but I would really like to know a way that I could see other users on my network.
I am on ubuntu server and its joined to an W3k Domain thru winbind/samba. However everything works fine and Windows and Local users can login to the machine without any problem. However when I wanted to create a local user X and change his password I couldn't. It created the local user X but I could not change the password.
This seems like somewhat of a n00b question, but I'm kind of stumped and working on a half a dozen other things at the moment, so I thought I'd go ahead and ask it.
Is there a "correct" way to set up a shared folder between two local users using only EXT4 that will allow both users read & write access to everything in the folder?
Here's my scenario: My wife and I use the same computer. I want two separate user accounts (mine and hers), but I want ~/Music to point to the same location for both users so that I don't have to duplicate all of the files.
Too protect the innocent, I'll use Jack and Jill.
So say Jack downloads or rips an album:
"/home/jack/Music/Radiohead/Ok Computer"
I want Jill to be able to able to create a folder:
"/home/jill/Music/Radiohead/Hail To The Theif"
I know the basics of symlinks so I can get /home/jack/Music and /home/jill/Music to point to the same place. I also have Jack & Jill in the same group.
The problem I'm having with my test setup is when Jack creates "/home/jack/Radiohead", it is set up to where Jill can read, but not write. So she can play songs from Ok Computer, but if she wants to download Kid A, she has to go in and manually change the permissions on Radiohead first.
Also, while I might set up multiple directories this way, what I DON'T want is for Jack to be able to modify /home/jill/otherdir where otherdir is just a regular directory set up with default permissions.
Oh, and as an added bonus, it would be nice to set up another account (i.e. a "guest") with limited permissions that can read, but not write/modify.
I am on ubuntu server and its joined to an W3k Domain thru winbind/samba. However everything works fine and Windows and Local users can login to the machine without any problem. However when I wanted to create a local user X and change his password I couldn'tIt created the local user X but I could not change the password. Here are the outputs:
"Merging" may not be quite the right word but that is the desired end result.
Scenario: many Solaris 10 servers, each with various local users. We want to set up LDAP for all for all of them. LDAP server is set up, procedure for getting other servers to use it for user authentication is documented and tested. The question is how to handle users that are in LDAP who also exist as a local user on a given machine.
It appears that the usernames on both sides follow a convention and therefore match but obviously the userids will not match. Local user joe has userid 1234, LDAP user joe has userid 56789.
The way I see it we'll have to:
1. move local user joe's home directory to the path that LDAP user joe will want
2. change local user joe's userid to that of LDAP user joe
3. change joe's files' owner to his new userid
4. remove local user joe
5. finally configure LDAP
Is this a rational procedure? Is there a more effective method? I'm not looking forward to this as there are many servers and each of them have a different set of local users, each with different userids which will have to be handled manually and individually therefore not even scriptable much.
I've got an Ubuntu server hosting our websites and other various things here in our own home. We recently switched to a router that doesn't support loopback (abomination), so I've set up hosts files on our computers so we can access our own sites when on our home LAN.
However, we often take our laptops as we travel about, and I'm guessing due to the hosts files when we try to access our sites, it'll look on whatever local network we're connected to for our server, which won't work, obviously.
Is there a way to set up something like a hosts file that'll only try to look up the local IP of the server when we're on a specific network (our home one), or have one that tries to look for the local IP first, then proceeds to try and resolve the domain name and use the external IP if the local IP doesn't work?
I have some typical issue while trying to connect to my root or other users from my terminal.
like su - asking for password and after that it displyed a message like $su -
Password: could not open session
I tried connect using ssh then I am getting the following $ssh root@localhost Last login: Sun Nov 1 14:13:45 2009 from localhost Connection to localhost closed.
Background: Before this happended, I was tryied modify sshd_config in /etc/ssh/ folder to allow passwords less than 2 words.
I have the following problem and tried (almost) anything to fix it but without a full success.
We're running a server with CentOS 5.4. Every night a logwatch report is send. These mails are rejected by our mailserver because some invalid details. These mails are send to local user root which is redirected to another external mail address with /etc/aliases.
At first the mail was send from root@localhost.localdomain to root@localhost.localdomain. As you can imagine, our mailserver rejected this because the localhost.localdomain parts. So I changed the sendmail config with these options:
This solved my problem partially: Mail is now coming from root@domainA.com (which is OK), but is send to root@slave02.domainA.com (slave02 is the local hostname), which is not OK. I tried everything I could find to change that last part to, but nothing seems to work.
