General :: DNS Recursion Impact Sendmail
Dec 15, 2010
I have a server provided dns and sendmail service, dns keeping record for my public servers. I don't want my server to be open dns server, so I just add recursion and forwarders option to named.conf, like: allow-recursion {192.168.x.x/24; 123.123.x.x/28; 127.0.0.0/8;}; forwarders {publicDNSipA; publicDNSipB;}; After restart named, all sendmail user can't mail to other internet account (like xxxxx@gmail.com); but local account is ok
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Mar 8, 2011
I am a newbie in Linux. I have Fedora 13 OS 32 bits. I am working with PowerDNs and Poweradmin. How can I configure this with PowerDNS?
1. Allow localhost recursion but deny recursion to external clients. Is there a tutorial for that?
2. Set up cache nameserver for localhost (like caching-nameserver in Bind).
Is there a tutorial for that?
3. My Master Server with PowerDNS is working well from localhost but external clients cannot access it.
I have iptables with these rules:
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May 10, 2010
I need to create a temporary Filesystem and the only way to do it is to reduce /var and create a new filesystem 3GB size
Code:
df -h
/dev/mapper/VolGroup00-var
9.7G 1.5G 7.8G 16% /var
my question is according to google search I need to umount the filesystem point in order to reduce its size.... so it means I will require that nobody uses the system? since /var logs a lot information?
I also have the option to reduce /root but I think is more complicated.
so what are the precautions in order to reduce /var/?
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Apr 14, 2010
So, I have this application called Impact, it is an explicit time integration Finite Elements code written in Java...
[url]
I untar the pack, and launch the application calling a script, from within the untarred folder,
Code:
This launches a gui which allows me to setup a case, which needs some setup file, tipically some *.in and a mesh file, tipically some *.msh.
Other mode of executuion consists of calling the setup file as argument to Impact.sh script ( CLI execution mode, for g33k5 )
My problem is : I have packed the whole stuff into a Slackware .tgz, that places it in /usr/local/Impact, and placed a calling script in /usr/local/bin,
Code:
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I decided to hack the ImpactGUI_OGL_linux_amd64.sh script from
Code:
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no avail,
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even after adding /usr/local/Impact/bin to PATH... won't go...
I can run this thing from within its directory... but I do not like messing within the directories of my applications, this is why I sent this to /usr/local, and placed a calling script in /usr/local/bin...
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Jun 15, 2011
I have bees assigned a problem which states that :
sendmail-2: Wrong number of instances of process sendmail:, expected instances equal 1 but found 0
THats it...what exactly this means and how should i proceed for solving this problem...
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Apr 26, 2011
My server has been the repeated victim of bandwidth attacks: any large file on the server is downloaded repeatedly, with the goal of pushing the server over the provider's bandwidth limit. How can I lessen the effect of these kinds of attacks with IPTables or APF? For example, can I set the server to: Is this possible? Is there a more effective way, and can a firewall even do this? My web server is Lighttpd, perhaps I can place such a rule directly in its config?
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May 26, 2011
I noticed my Internet slows to a crawl when I'm running bittorrent, but when I look at my torrent app (Transmission), the upload/download speeds are mere kilobytes per second, and my Internet has much higher bandwidth capabilities than that.So I tested it:No torrent running
(ping: 13 ms, down: 11.39 mb/s, up: 2.80 mb/s)
Torrent running
(ping: 752 ms, down: 4.30 mb/s, up: 0.19 mb/s)
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Sep 4, 2010
I run a dedicated specialty Quake 3 Arena Server.It currently runs a stock Debian 5.05. These are the hardware specifications.
256mb SD Ram
10gb Hard Drive
Intel Celeron
I think I should be getting more speed then I am.I would like to install Ubuntu Server.What version is the most stable, and will provide the best speed?I have to download my server files from the internet. Is this possible without the GUI?Is there anyway to control my server remotely, without any impact on performance, VNC is a huge impact.I want to run a mail server as well, is this possible with out a performance hit?
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Apr 26, 2011
I have a perplexing problem that I was hoping some of you might help me solve. My servers run 10.10 and also serve as standalone LTSP hosts - none of this is terribly relevant I hope. Recently, a user complained of permission problems and so I ran a simple command:
Code:
chown -R username:username /home/username/*
and
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Sep 5, 2010
I have installed postfix and dovecot on my server and thought postfix will not only take SMTP connection from my e-mail client like Outlook, but also handles "mailx" commands from the server. However, it looks like sendmail is still responsible for sending mails from "mailx". I tested this by turning it on/off using "service sendmail stop" and "service sendmail start". Mails sent using "mailx" will only be sent when sendmail is up. When I did "yum info sendmail", it lists sendmail as an installed package. Is is safe to remove sendmail by running "yum erase sendmail", and let postfix handles "mailx" also?
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Apr 7, 2011
I'm still a but confused about the standard way of removing it for left-associative operators: [URL] Especially about how to construct an AST from it by executing a peice of code for every nonterminal matched. And I'm still not totally convinced that it will be left-associative, I just barely understand it. Also, how would you remove left-recursion for something like this:
Code:
expr ::= expr "(" param_list ")"
| other stuff...?
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Nov 1, 2010
I am using webmin for my daily tasks. I have fedora 13, whenever I click on ''Sendmail M4 Configuration'' or Outgoing Addresses (generics)'' I get the following error message
Quote:
The Sendmail M4 configuration base directory /usr/share/sendmail-cf was not found on your system, or is not the correct directory. Maybe it has not been installed (common for packaged installs of Sendmail), or the module config is incorrect. I read documentation at sendmail.org, it seems that structure of directories for send mail has been changed in version sendmail-8.1.4 shipped with FC13. In webmin config module we have
Quote:
Sendmail M4 base directory = /usr/share/sendmail-cf
which is not there. I did a locate / sendmail-cf on the command line, it finds nothing
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Jul 13, 2010
I have been trying to set up ssmtp so I can send email using Gmail's ssmtp servers. However, when I try to send mail (using mailx), I get the following message:
Code:
Can't send mail: sendmail process failed
Here's the last line from dmesg (the only one applicable, according to the timestamps and message content):
Code:
[484114.608378] sendmail[17975]: segfault at 0 ip b7dbbbf3 sp bfb0dc4c error 4 in libc-2.11.2.so[b7d44000+14e000]
Here's my ssmtp.conf:
Code:
#
# /etc/ssmtp.conf -- a config file for sSMTP sendmail.
#
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Apr 1, 2010
I recently modified sendmail.cf to use a third party SMTP server to send emails. It works great. But when I run sendmail from the command line, I have to specify the -C flag and force feed it the location of my sendmail.cf, or else it doesn't work.
So in other words, the following works great:
However, if I don't specify the -C flag, sendmail doesn't consider what's in the sendmail.cf and barfs:
I don't run sendmail as a daemon. I'm only using it to send emails. I know my modifications of sendmail.cf are correct because it works perfectly when I use the -C flag. I searched my disk to see if I could find another sendmail.cf on the machine and only the one in /etc/mail came up.
Why sendmail is not reading my sendmail.cf?
I'm running Sendmail version 8.14.2 on Fedora Core 8.
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Mar 5, 2010
I've got a VPS node running 2.6.26-2-openvz-amd64 and several guest machines. My kernel keeps reporting a printk bug in syslog:
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This is somehow being replicated on the guests machines. I've read that printk is a kernel function that prints out a message, during bootup Has anyone experienced similar problem or have a more experience with this? Does it have negative impact to the host performance?
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Jan 20, 2011
The first is about implementing function calls. The way I currently have it is that functions are called with a C++ std::vector of nodes as the parameters. How would I turn a comma-seperated list of expressions into a C++ vector in the grammar?Second, how do you implement left-associative operators in a parser that does not allow left recursion?
And third, what would be the best internal representation of integers? A C++ int seems simplest, but limited. Using GMP seems more versatile, but I'm afraid it might seriously slow down the interpreter compared to C++ ints.
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Jan 22, 2010
I have uShare 1.1a setup to talk to my XBox 360. If I share a directory that has no subdirectories, the video files display on the XBox. However, most of my files are in sub-directories on a different partition - I don't really want to copy them to the share, but uShare doesn't seem to recognise any sub-directories or files contained therein.
I have tried setting up symbolic soft links directly to the video files (although this is a pain, it is better than moving the files)...
Code:
ln -s /home/jonftp/TV-Shows/Buffy/Season-1/Buffy-101.avi /home/share/Buffy-101.avi
...but these don't show up on the XBox either.
How can I get uShare to "drill down" the directory structure to list the files or how can I get uShare to follow symbolic links?
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Jan 15, 2011
I have a apache server installed on my system which I use for testing out stuff like wordpress and forums. I use the server for learning stuff only. I would like to know what do I have to do so that these blogs, forums etc can send an email when someone registers. I guess most of these use sendmail to send email. So how do I configure sendmail so that it sends email using my gmail address and smtp. Also I think there is a php mail option (or something called like that) that allows us to send email without having sendmail installed.
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Aug 9, 2010
Is it possible to migrate users from sendmail to Windows AD?
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Mar 9, 2011
Been using the Amazon EC2 Linux AMI and enjoying it.It comes configured with sendmail. I think I'd rather use postfix.replacing sendmail with postfix might be as simple as what I found searching online:
$ rpm -e sendmail
$ yum install postfix.
However rpm complains:
$ rpm -e sendmail
error: Failed dependencies:
smtpdaemon is needed by (installed) mdadm-2.6.9-3.7.amzn1.i386
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Apr 14, 2011
I am in need of configuration settings and steps for sending mails from linux server to some other domain or network. I need to send mail from linux system to my mail id.
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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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Aug 28, 2010
I am having a problem with sendmail. Using a php script the process that 30 seconds to send. I have googled the symptoms and have changed sendmail.cf ==> Timeout.ident=0 and configured /etc/hosts properly. I'm using Fedora 11 and 12, same issue.
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Feb 27, 2010
We are using RHEL4 AS U5 and Sendmail version sendmail-8.13.8. How to find out total mail transfer size (month basis) through Sendmail service. Is it possible in linux.
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Oct 18, 2010
I am on Red Hat Enterprise Linux AS release 4 (Nahant Update 6). I need to configure Sendmail in my Linux Server.
1. edit /etc/mail/sendmail.mc
dnl #
dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
dnl DAEMON_OPTIONS(`Port=smtp,Addr=172.16.10.6,Name=MTA')dnl
dnl #
2.rebuild /etc/sendmail.cf from the revised /etc/mail/sendmail.mc thus:
m4 /etc/mail/sendmail.mc > /etc/sendmail.cf
3. Edit /etc/sysconfig/sendmail
DAEMON=yes
QUEUE=1h
4.And restart sendmail
cd /etc/mail
make
service sendmail restart
5.sendmail -v abc@gmail.com
Its working but going to spam and more thing. I am not able to send to our company id..
sendmail -v abc@rbs.com
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Sep 29, 2010
To configure sendmail on my linux system.
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Dec 4, 2010
As per the subject really, is it possible to configure sendmail to use my ISP's SMTP gateway? If so, how?
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Aug 1, 2011
I searched sendmail using "dpkg -l sendmail" on ubuntu 9.04 jaunty" & found, package not installed. I am trying to install sendmail using "aptitude install sendmail", but it is not installing & the process is showing as it is being installed even after 5 minutes. how can I install sendmail by using CLI mode. Becuase none of the user account is able to send mail to our offcial mail ID, which is getting mails from other servers.
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Feb 15, 2010
I am in verse to try out setting up Sendmail Relay Box.I have 3 Machines:sender.sap.com,relay.sap.com and receiver.sap.com.All I need a user fred in sender.sap.com able to send mail to a user tom in receiver.sap.com through relay.sap.com machine.I guess that is all about relaying Correct?How can I achieve that?
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Oct 14, 2010
I am on Scientific Linux. While trying to remove sendmail, YUM asked to remove depended packages:
alpine
fetchmail
mdadm
mutt
redhat-lsb
sendmail-cf
Should I really remove them and sendmail? If trying to install potfix, YUM does not say that sendmail is incompatible and does not ask to remove it.
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