Iam handling mail server in redhat.MTA using is qmail.since last 1 month it get overload and get hang...since in morning its time for user to loging into mail through web interface.though suddenly login in to mail it get overload and server got hang.we need to restart the server...did not get time to kill https also some time MP port work to save us...still didnot get command to overcome the over load in server...
View 9 RepliesI have mysql server ( OS:FreeBSD) is have 8 cores cpus and 8GB RAM.
Sometime, Box's top is not showing the cpu utilization. Output looks as follows
last pid: 44258; load averages: 0.38, 0.42, 0.23 up 0+16:31:11 07:15:14
169 processes: 14 running, 136 sleeping, 19 waiting
CPU: % user, % nice, % system, % interrupt, % idle
[Code]....
Moreover, WCPU is >98%. But not much processes are running on that server.
get the info about cpu or box ?
1. How to proove that box is having CPU issue
2. Is it related to memory ?
Apache is overloading the server executing as the user nobody.
Below I give the output of top -c
Code:
What might be the possible reason for overloading. I can give more visibility to this if required.
I am trying to set up a mailer server on Lucid Lynx using mostly this guide: [url]
I believe I have most of the basics covered. But before launching into the the advanced set up, I want to see if I can get help with one thing I am finding difficult to understand.
In terms of my domain name www.example.com, do I have to do anything on my hosting company's side? That is, www.example.com currently have my web site and it is hosted on a private server at a hosting company. I have the ip address of the server. When I configured postfix, i used this same domain name in the configurations so I want to know what else to do to get it working.
I am using this command (inside a bash script) to check if mailserver is running correctly (port 25)
# echo | telnet localhost 25 | grep "Connected to "
If it does not respond I receive an email alter.
It works good , but sometime it NEVER respond (neither after 1 hour) , so I receive no notification . DO you know alternative command to the command above ?
I have Ubuntu Server Edtiion on my server. During the installatino, I choosed to install the mailserver.
I have already configured the MTA.
I also configured the MDA(Dovecot). After I configured the MDA and tried to login on squirrelmail, plenty of MySQL error was generated.
I deleted Dovecot and tried again to login on squirrelmail. Now, this message appears:
Error connecting to IMAP server: localhost. 111 : Connection refused
I have followed the guide for "The Perfect Server - Debian Lenny (Debian 5.0) With BIND & Dovecot [ISPConfig 3]" and all is well, except.
I can send mail (to GMail) from commandline. I can send mail (to GMail) from any of the domains configured in ISPConfig3 through SquirrelMail (how ever terrible that looks, but functions) or IMAP/POP.
but....
I can't receive mail (from GMail) on any of the domains configured in ISPConfig3 in SquirrelMail or IMAP/POP.
I have my domains configured with proper MX records (just like I have them configured at work). I have all ports (80, 143, 110, 25, 22, etc) forwarded on my router that are needed.
I can Telnet to localhost and all checks are fine. I can send and receive from and to local domains on the same server, which makes sense. but
I can't Telnet from any external server to my server behind NAT.
Conclusion:
I figured it MUST be a network/port-forwarding problem as the external Telnet requests fails to my machine on port 25.
Tested my router if it would let met communicate through port 25 and it would.
So it must be my ISP, as I read in different posts.
Question:
Maybe I'm a n00b, but in all other posts the problems were with receiving AND sending.
My ISP responded that port 25 is blocked because of spam issues.
But I can mail (and even spam if I would like to) to external domains while I didn't do anything weird to make that happen.
The only thing I wish for is to receive mails and if you'd ask me, port 25 would be solely for outgoing mails, not for incoming mail deliveries throught MX?
An ISP surely wouldn't disable their customers in having a mail-server for incoming mails, as long as they would send out through their own smtp server to make sure they wouldn't spam the world?
Im using posfix as a outgoing mail server, here i want to distribute the mails to different ips to avoid the ip blacklisting. I found a solution by using multiple transports , but here one thing blocking me was i could not able to select a transport using regexp or pcre matching pattern, log says that
Code:
Jun 5 07:12:49 server postfix/trivial-rewrite[6079]: warning: pcre map /etc/postfix/transport.pcre, line 1: regular expression substitution is not allowed: skipping this rule
the transport used for this purpose is:-
Code:
#cat /etc/postfix/transport.pcre
/^.*@([a-z])ol.com$/ transport$1:
can i just copy/backup postfix mail queues in /var/spool/postfix and paste that folder back in after i done migrating all users and mails to a new mailserver?
View 3 Replies View Relatedrecently my server become a little slow and lazy, so I started a small investigation what's going on and found out, that there is some problem with network.All processes which uses network are able to use 99% of CPU time when they got any requests. First time i thought it's only a bad configured Apache but after some research I found even FTP or SSH does it if they have to do something more (for example getting data to another server using rsync).So far I wasn't able to find a cause of this. No new software installed, only updated every few days. I have another server which have the same config, same software, same hardware and is updated in same days. But this one works without any problem. I think it's probably hardware (LAN) leaving me to it's creator. Is there some way how can I test if it's really LAN or just something bad happened to the system?
Also there is another issue - maximum speed dropped down to 20-30kB/s for both download or upload.It's Debian Lenny 2.6.22-6 if you need to know.
After upgrading to 11.04 I find that if I launch ubuntuone my machine immediately slows to a crawl and there is intense hard drive activity.This persists for hours. Only solution so far is to close ubuntuone and remove it from list of startup applications. I have made no changes to the files marked for ubuntuone syncing, and everything worked fine in 10.10.
View 4 Replies View RelatedMy server OS CentOS release 5.4 (Final). Using Plesk panel 9.2..Server getting down frequently, how to check the log on server. how to find out the reason.
View 9 Replies View RelatedI have Cent OS 5.1
I also have http://phpsysinfo.sourceforge.net/
I have asterisk running .
Now when I look at System Information ,
I see that "Physical Memory" keep increasing and at one point it reaches 96%. Then my sever get hang and then I have to restart it.
I have 4 GB RAM.
Processors 2
Model Intel(R) Core(TM)2 Duo CPU E7200 @ 2.53GHz
CPU Speed 2.53 GHz
Cache Size 3.00 MB
System Bogomips 10135.71
Kernel Version 2.6.18-53.el5 (SMP)
Distro Name CentOS release 5 (Final)
Load Averages 0.27 0.35 0.31
What could be the reason ?
Trying to install Ubuntu 10.10 Server via a usb flash drive. Can't use a cd-rom as the server doesn't have a cd-drive! lol! It boots up and then hangs at the loading stage where the ubuntu symbol is displayed.
View 1 Replies View RelatedWe are using squid proxy server in Linux and server is getting hang often, during this time when see the log file it will show like below
Jul 23 11:52:26 Linux-GW avahi-daemon[2028]: Invalid response packet from host 192.168.1.154.
Jul 23 11:54:55 Linux-GW avahi-daemon[2028]: Invalid response packet from host
[code]...
I am trying to install RHEL5.5 server on Dell Optiplex 360. When its reached at "checking dependencies in packages selected for Installation" its hang. What should I do, I checked cables hardware etc... every thing looks ok.
View 7 Replies View RelatedHow do I make a server wait on shutdown for a set amount of time?I tried making a service that just does Code: sleep 7m and made it first priority on shutdown but it seems to ignore itI'm pretty sure it runs... I'm currently testing that to make sure
View 4 Replies View RelatedI have a newly built Redhat 5.5 box. When connecting over VPN and executing either "ls -al" or "df -h", the command prompt hangs without returning any output. Have got same result with TeraTerm and Putty clients. However, other commands run fine. Also,local users are able to run "ls -al" or "df -h" successfully.Storage is local disk. Any idea what could be mis-configured.
View 1 Replies View Relatedfrist i want to thank all who worked on this website i was install squid and other service in my office network server and install the same services with same configration on biger network about 150 machines every thing well on office network but the other network have problem squid hang and stoped serve any request and squidclient command return "alarm clock " message after many time but the service still run at port 3128 and status is started when i run /etc/init.d/squid reload its run again sometime and hang again squid log file have not any problem on it i install my server on gentoo with flags
Code:
net-proxy/squid-3.0.19 USE="zero-penalty-hit -caps -epoll* -icap-client (-ipf-transparent) -kerberos -kqueue -ldap -logrotate* -mysql -nis -pam (-pf-transparent) -postgres -radius -samba -sasl (-selinux) -snmp -sqlite -ssl"
my squid.conf
[code]....
When i checked my server in today morning,i found server was hang.
How can i find whether it is hang or not?
Where can i find the log from which i can find the exact time?
But when i try the Ubuntu Server Edition, using the same method of burning the iso file i downloaded from ubuntu homepage into a cd, and when i reboot my pc and the screen display the following:ISOLINUX 3.63 Debian 2008-07-15 Copyright (c) 1944-2008 H. Peter Anvin
Loading...Initializing gfx codeand it hang there.Do anyone know what happened? I have verified the file i download and the disc i burnt through MD5SUM.
My Laptop spec:
Intel(R) Pentium(R) M Processor1.86GHZ
1GB Ram, 80Gb Hardisk
OS1: Microsoft XP Home edition SP2
OS2: Ubuntu Desktop Edition
I recently set up a mailserver on ubuntu using postfix. I set up the MX record with my router's ip address and I have port 25 forwarding all the mails to the ubuntu server. Everything works fine but I am unable to access my email using example.com/squirrelmail from any other machine apart from the server.
View 7 Replies View RelatedSchool with linux running on students' laptops, connecting via wlan to a Debian NFS and LDAP server. Every student logs on his/her profile residing on the NFS server.The clients are set up with autofs. Earlier, I had set up the wireless network in /etc/network/interfaces, but this time I decided to configure network manager so as to bring up both wireless and wired network before logon. This setup has been working on for the last fire or five years with only minor changes. Also worked with Karmic Koala, but still with the interfaces file instead of networkmanager. The Vostro is also new here, we've previously used mostly Dell Latitude D505s.
So here is what works:
1: Clients can log on to LDAP and NFS servers both wired and wirelessly. Everything is smooth.
2: While on LAN, shutdown and restart works flawlessly (and quick as a breeze, I'm really impressed by startup/restart/shutdown times, under 25 secs!).
3: Shutdown and restart also works wirelessly when doing it either from a local account or from the GDM chooser.
What doesn't work, however, is shutting down or restarting directly from a networked account connected while only being connected over the wireless network. This is what's being displayed on the terminal after it has tried tho shut down for a while:
Code:
The system is going down for halt NOW!
acpid: exiting
init: cron main process (1011) killed by TERM signal.
init: tty1 main process (1365) killed by TERM signal.
[code]...
If I try ctrl-alt-del at this stage, it says:
"init: rc main process (3030) killed by TERM signal"
"Checking for running unattended-upgrades: "
And then it will hang again, until I hold the powerbutton for some seconds. The unattended-upgrades part is what seems to be the culprit. I suspect it is about the wireless network not being connected any longer or something like that, but I'm not sure about how to go about debugging shutdown scripts here. I'd be grateful for pointers. I will try and see how it goes with the old interfaces file setup, but I'd rather make nm work.
I have two boxes, 1- Centos router, 2- centos web/mail server..
When trying to receive mail using mail.xxx.xxx in the mail client server settings, it will not resolve to any machine on the internal network... I have to enter the internal IP address in the incoming and outgoing email settings..
Same with the website I host.. I have to enter the internal IP to get access..
It just will not resolve the DNS on the internal network.
Everything works as it should outside my network.
I want to run a mail server from within debian linux guest with vmware workstation xp host. The setup is a bridged network connection
Here are things that need to be done:
a)Configure the Guest with a static IP on my home network. Verify that I can telnet to port 25 of the Guest from a system on my home network.
b)Then configure my home firewall/NAT box to forward incoming connections on TCP port 25 to the static IP address I gave my Guest. Then test that I can telnet to port 25 from a system outside my home network.
c)After that I need to configure the appropriate DNS records for my domain so that outside hosts know how to contact my mailserver.
Does a mailserver have to have direct access to WAN or can it be a LAN device with just one NIC ?
We have two WAN access points.
One is an adsl router joined to the switch and all seems fine for internet browsing.
The other is a wireless system with a linksys router joining by way of PPPoE and this appears to connect fine.
This PPPoE is direct to our ISP and where we need to downlod our mail to our pending mailserver.
When the linksys router is also joined to the switch all devices can use either the adsl or linksys to roam the net. 192.168.1.1 linksys & 192.168.1.10 is adsl.
When I join the linksys direct to the mailserver I will then need two NIC's. One for the Linksys and one for the LAN.
This is where the fun has started.
So.... Can I just have one NIC (connected to the switch) on the mailserver?
Still trying to get that elusive simple mail server. Have install Centos 5 (20 time!) and updated software. Have got the system to see www and now about to do the mailserver thing. One of the first steps is to install Clamav yet this does not show on the package list for the program add delete gui. Tried yum install clamav and got message back that it wasn't available.
Google advises that I must first install rpmforge but at the same time has a warning from the maker of yum that this is dangerous to do Clamav is clearly a very popular antivirus scanner yet Centos 5 does not include it or allow you to install it?
Please tell me spesification if i want buid mail server on ubuntu 10.04 with good features :
1. For MTA ??
2. For Mail Filtering ??
3. For MDA ??
3. For Webmail ??
4. For Mailling List ??
I created a script to flush my sendmail to another mailserver. Because it takes some time I want to give some simple feedback using a rotating bar.
Code:
I'm convinced this can be done much nicer with 'awk' and printf, but somehow awk makes me dazzle..
I recently created a webserver to host my website, using a Ubuntu 8.10 based system. (With some help from my experienced brother of course).I now want to create a mailserver to go along with my website. In setting up postfix to work with gmail smtp servers, I ran into a lot of permission errors.
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