We are running a sendmail(8.13.8-2.el5) service on one of our server running RHEl5
When I try to mail from one of the machines connected to the server on our private network, log file on that machine shows that the mail has been sent and also there is no mail in the queue, but when I check the server, there is no mail received, not even any status on log file. Did anyone experience anything like this or any idea about this problem?
I have a DNS server that's been working just fine up until now. I have a local domain, "galapagos.office" set up, with several subdomains on it. I've been able to get to all the subdomains just fine for the last couple weeks from several different machines.Now something weird's happening:
I CAN ping wiki.galapagos.office from a local machine
I CAN do an nslookup on wiki.galapagos.office from a local machine
I CAN see wiki.galapagos.office in a browser from a local machine
I CAN'T ping wiki.galapagos.office from the DNS server itself
I CAN'T do an nslookup on wiki.galapagos.office from the DNS server itself
I CAN'T see wiki.galapagos.office in a browser from the DNS server itself
And I COULD do all these things before. I don't know exactly when things went south because I almost never do anything from the DNS server itself.
I realized there are often weird yahoo connection on my mail server (SCALIX sendmail).
on ps aux | grep yahoo , i get a lot of connections such as these:
I get about a dozen of it, i think it is taking up my connection, anyone has any idea why how these connections appear? Is it because of my server's security loophole?
Recently I had (and am still having) a lot of trouble with my Fedora 12 installation.First, 3D acceleration and sound stopped working. This was solver by adding my account to the "video" and "audio" groups (I wonder howcome it worked before?).Then, my keyboard stopped working in X. It would work fine in CLI mode, but as soon as I start X not even the Num Lock LED worked! I think I glimpsed that it might be due to a missing keymap or something, but I don't know. I got my computer back by making Xfce's keyboard settings override X, but it still isn't right, and I can't use anything other than Xfce.Recently I tried to burn a CD/DVD but neither Brasero, K3B, nor cdrecord could detect the DVD burner.
View 5 Replies View RelatedIf I right-click a file and select VLC, I get immediate playback from VLC. Everything seems fine until I hit Ctrl+O to select another file. It seems to freeze, but it actually just takes a few minutes to get going.So I opened VLC via a terminal, then hit Ctrl+O,
View 6 Replies View RelatedI was working on our PC and screwed up my logical partition. Not much of a concern there but the problem starts when I was trying to repair them. My gparted says that my whole HD is empty. In fact, when I try to install an OS, it wanted to install it on the whole HD (80-G).
View 5 Replies View RelatedWe have a nameserver which we moved over from an old server & ip a couple of weeks ago and updated all our dns records.Currently, our dns provider shows the proper records for our server, and if we dig the server at our dns provider we get the results. However, if we ping the server, or dig it and don't specify our server we get the old ip address.An opendns cache check also sporadically returns the proper results from some of its locations but generally returns the old ip address. Does anyone have any suggestions because this bewildering me.
View 1 Replies View RelatedSo first my network appindicator disappeared, then my weather appindicator won't show me the weather, NOW my computer won't let me download anything from the software center and won't let me update anything in the upgrade manager.
View 9 Replies View RelatedI am setting up a server and trying to access its partition over the nfs on a client machine. Our server has 4 1.5TB disks and the idea was to make a RAID 5 out of it.Now here is the problem:When I used only 1 disk that is nfs partition was of 1.5TB, I got fine speed(30MBps), but with multiple disks whether I am making 3TB (Raid 10) or 4.5TB (Raid 5), I get a really poor speed of 5-6MBps. I/O just waits.But for all above cases, disk I/O locally works fine.Does anyone knows any NFS limitation that is causing this problem?
View 4 Replies View RelatedJust like the title, my Ubuntu 9.10 audio acts really weird to me. Sometimes I can't record anything using the sound recorder and the immediate muting of the loud speaker when i plugged in my headphone doesn't work, but then all of sudden it worked and then the problem might occur again. It's like, in some period the audio works perfectly well as if there's not bug, and then it goes wrong.What I noticed is that the problem reoccur when I shutdown/restart my PC and after few minutes/hours/days it works fine again. Does anyone know why this happens and help me solve this problem?
View 2 Replies View RelatedI have just upgraded from 10.04 (where everything was working fine) to 10.10...I am able to boot in recovery mode (graphic mode is working ok this way), but not in normal mode: just after the purple Maverick boot screen, I get a black screen where my computer stucks, possibly for ever (although I can't be definitive on this point )Do you guys have any thought on what is going on here?I boot once in recovery mode, updated my graphic driver (ati, which was not working well anymre according to catalyst), and then I thought everything would be allright, but it is not the case: still black screen at boot.
View 9 Replies View RelatedI recently (fifteen minutes ago) started my old desktop again and tried to do an updateCode:sudo apt-getupdateWhich gives me:Code:E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.When I try this, my screen goes back and after a few seconds I end up back at the loginscreen (I not logged in anymore)The output of Code:sudo dpkg --configure -ais followingCode:Setting up ubudsl (1.0.0.77-7) ... System start/stop links for /etc/init.d/ubudsld already exist.Stopping UbuDSL daemon...No /usr/sbin/ubudsldaemon found running; none killed
View 3 Replies View RelatedCan this be done? A company is currently running a postfix mail server. They got a new server and, while the users are migrated, they need to have the messages delivered on BOTH servers.
I thought it could be easily done in postfix: deliver locally AND forward mail to new server, but all solutions I found would deliver the messages in just ONE place.
This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
xx@xx.com
SMTP error from remote mail server after initial connection: host [URL] [ip address]: 550 Access denied...
I've recently switched back to Ubuntu and I eventually had to sync my new ipod. I've been getting this problem where every time I sync with either GTKpod or Rhythmbox my ipod music is acting weird. It shows new music that I've added but when i choose to play it skips to the next track that then skips to the next track, and so forth. Its as if my ipod is filled with songs that don't even last 0.0 seconds! But the songs completely play in Rhythmbox, so I don't think its a problem with the files themselves.
View 4 Replies View RelatedI have a problem relate to posttfix.I want to mirgare postfix mail server to exchange 2010 mail server but I can't do it,u can help me.You can show me have to do configure postfix and exchange how to?
View 1 Replies View RelatedHow do I make a local mail server that itself is a client to a WAN mail server.I want the local mail server to query new mail every 30 minutes from the WAN server.
View 6 Replies View RelatedThere is an requirement, intranet people they may not have internet access but they want to send mail to external domain(internet),but in that intranet network one machine can have internet access. Is there any solution for this requirement.
View 2 Replies View RelatedI've setup my server by following a ton of goods, and it seems to work ok, but I need to start using my server for email in order to receive orders placed via my website. I've followed this guide - [URL] I followed the steps above, and tested the mail server via telnet, and all seemed to be ok. I tried sending an email via Squirrelmail, from cs@thinclientwarehouse.co.uk TO my working email simon@c1systems.co.uk, but the server returned with the following message:
<simon@c1systems.co.uk>: host mail.c1systems.co.uk[95.128.128.129] said: 550-Verification failed for <cs@localhost.thinclientwarehouse.co.uk> 550-The mail server could not deliver mail to cs@localhost.thinclientwarehouse.co.uk. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries. 550 Sender verify failed (in reply to RCPT TO command)
I will be relocating to a permanent residence sometime in the next year or two. I've recently begun thinking about the best way to implement a home-based network. It occurred to me that the most elegant solution might be the use of VM technology to eliminate as much hardware and wiring as possible.My thinking is this: Install a multi-core system and configure it to run several VMs, one each for a firewall, a caching proxy server, a mail server, a web server. Additionally, I would like to run 2-4 VMs as remote (RDP)workstations, using diskless workstations to boot the VMs over powerline ethernet.The latest powerline technology (available later this year) will allow multiple devices on a residential circuit operating at near gigabit speed, just like legacy wired networks.
In theory, the above would allow me to consolidate everything but the disklessworkstations on a single server and eliminate all wired (and wireless) connections except the broadband connection to the Internet and the cabling to the nearest power outlets. It appears technically possible, but I'm not sure about the various virtual connections among VMs. In theory, each VM should be able to communicate with the other as if it was on the same network via the server data bus, but what about setting up firewall zones? Any internal I/O bandwidth bottlenecks? Any other potential "gotchas", caveats, issues? (Other than the obvious requirement of having enough CPU and RAM).Any thoughts or observations welcome, especially if they are from real world experience in a VM environment. BTW--in case you're wondering why I'm posting here, it's because I run Debian on all my workstations/servers (running VirtualBox as a VM for Windows XP on one workstation).
I was using an email server from Icewarp, Merak Mail server V8.0.3 with a keygen for total full free use... I liked this server package... as everything is in there I need and it is controllable from a single window. Now I am planning to move to Linux... They have a Linux version, but not stable and expensive. Is there any thing almost free/less expensive (Specially they need yearly payment for upgrade of even the anti virus and anti spam)?
I need a almost same thing (except of the ftp and VoIP) like Merak (because that I really liked for ease of administration) in Linux? Like a Qmail with real strong Anti Virus and Anti Spam, with unlimited domain and user+autoresponder, mailing list, etc all but controllable from one single GUI?
by now I have 10 servers for hpc, power computing oriented. My users need to launch several processes using qmake. The users are used to work with ubuntu 9.10, and the software from the repositories is switable for them. I've deployed ubuntu 9.10 to all 10 servers (pxe rocks). By now we work with parallel-ssh and cluster-ssh, which allows as to launch the same process to all servers. With this tools this tools the servers remain as independent but with the same software and the same launched command. Now we would like to go to next step and see all the servers as a single one with all the resources from the other 9 as if was its resources. The difference would be substantial in time to process and also time to design the command to launch.
View 13 Replies View RelatedI want to use 2 network cards on a notebook (one internal and one by USB). I don't want the typical "internet sharing", so I want it to act really as a switch:
Other room <== 1Gb/s ==> Notebook <== 100Mb/s ==> network switch with more computers.
I want to do it because i want to use the 1Gb/s link from the other room to the "servers" room, and then the rest of servers will run at 100Mb/s. I wanna all my computers in the same network, like there's no notebook in the middle, so the Notebook will act as a switch (and a server). i wanna (assumming all of this is possible): Code: > [network switch] 1Gb/s
> 192.168.2.1 [router] 100Mb/s
> 192.168.2.2 [wi-fi AP] 100Mb/s
> other room 192.168.2.50 [new notebook] 1Gb/s
[code]....
I have an EPIA M10000N (VIA Nehemiah 1GHz integrated CPU) motherboard (square MB each side 17cm) in a GA610 case. These last two links show the situation quite well.I have neither a CD/DVD drive, nor a floppy drive in the case. Only a hard drive, the motherboard, and the power supply.As you can see in the pictures, the whole thing is cooled by a 4cm fan on the CPU heat sink, and another 4cm fan at the rear of the power supply.This is rather noisy (and unbearable in a living room!).After looking (not that hard, though...) for a solution, I did not find a proper (less than 20dB, and good quality) solution. So the living-room PC became a server. It's either that of throwing it away, anyway. Having nothing to loose, I want to try something. And I'd like to have your opinion, dear reader.I want to:
- remove both 4cm fans,
- remove the cover from the power supply,
- cut a round hole on top of the case,
- fit a 12 or 14cm fan on the lower side of the round hole, right above both the CPU and the power supply.
I'm new to this cooling stuff. I saw that a 4cm fan can extract up to 5 CFM of air, whereas a big fan can extract at least 60 or 70 CFM!Changing two noisy 5 CFM fans with a single silent 60 CFM fan seems OK to me.What do you think of the idea?Next, for better reuse, I may buy a Noctua 14cm NF-S14 FLX. It is big and silent, and 71 to 110 CFM seems a lot! And its fixation holes match those of a standard 12cm fan, thanks to the unusual shape
Do you approve?
I still hesitate a bit because:
- the Noctua NF-P12 1300 might be more sturdy due to its regular shape...
- the Enermax Magma UC-MA12 might be a better choice because it can be washed... on the other hand, because of that, it may get loose with time...
We have a samba server with a couple of shares defined as follows:
Code:
[Storage]
comment = Storage
browseable = yes
path = /home/samba
writable = yes
[Backup]
comment = Backup
browseable = yes
path = /mnt/hd2/home/samba
writable = no
[Administration]
comment = Administration
path = /home/adm
valid users = adm
public = no
writeable = yes
browseable = no
We have two samba users: samba and adm. The first is used to connect to Storage and Backup shares, and adm is used to connect to Administration share. There are two problems:
1) If Storage and Backup shares are connected to a Win7 box, the Administration share cannot be connected. All we get is an error saying that that share is already connected with different username.
2) We have managed to work around this by connecting the Administration share with the IP-address of the server instead of it's name(?!). The problem then becomes that sometimes connecting Administration share this way makes Storage share read-only. Not always though.
Wrong "security" type in smb.conf (was "user", needs to be "share"). For some reason the Storage share still occasionally gets connected read-only. Win7 also tends to forget the passwords/usernames for some shares upon reboot (not all of them, though).
I have been having some odd issues over the last day or so while trying to get a raid 5 array running in software under Kubuntu. I installed 3 1TB drives and started up, my sd* order got all messed up( sda was now sdc and so on). This wasn't entirely unexpected, so I fixed up fstab and booted again. I found all three of the drives I installed, set them to raid auto-detect and used mdadm to create /dev/md0. I then created mdadm.conf by piping the output of mdadm --detail --scan --verbose into /etc/mdadm.conf.At this point, everything was still going swimmingly. I copied over a few hundred GB of data from another failing drive and everything seemed ok. I went to reboot once the copy was done and everything just went weird. All of the sd* drives went back to the original. Of course, this meant that the mdadm.conf was wrong. I tried to just change the device list, but that didn't work. I then deleted mdadm.conf and rebooted. The drive list stayed in the original order this time, so I just tried manually starting the array.
By erasing the partition table of the 3rd drive, I've been able to get it to the status of spare, but it says it is busy when I try to add it to the array. A grep through dmesg makes me think that md has a lock on it. I'm not sure where to go with it now. If anyone has any pointers, I would like to hear them.
Device List(original):
/dev/sda => boot drive, /home /
/dev/sdb => 1.5TB media storage, failing
[code]...
So, the NSA puts out some handy documentation on locking down a RHEL server (running centos 5.6 x64 myself) here, [url]. Under "Ensure System is Not Acting as a Network Sniļ¬er" on page 63, it says that if any numbers below the first line in /proc/net/packet, that it is acting as a network sniffer.
I get the following output:
Code:
Unless I've been pwned, I don't know exactly what could be causing this. Besides samba, nmap (compiled from source, not from yum), screen, and rtorrent, there's nothing I've installed beyond the fresh install I did a few days ago. I was not running nmap when looking at /proc/net/packet.
My postfix server will not allow me to send mail except if I am on the server it self.My postfix conf is as follows.
server:~ # postconf -n
alias_maps = hash:/etc/aliases
biff = no
[code]...
I would like to set disclaimer like content in my meral mail server, so that all the users should be able to get that content automatically in their outgoing mails.
View 3 Replies View RelatedI am using postfix as spam Mailscanner to protect my mail server running sendmail. The problem is that when I forward an email from MailScanner mail me back with the following error:
<postmaster@localhost.@mydomain.com.>... Real domain name required for sender address (in reply to MAIL FROM command))
Jul 27 13:15:59 smtp postfix/local[28465]: C68AC1000001: to=<root@smtp.mydomain.com>,
[code]....