Hi,
Use the following to find out the version info
java -version
java version “1.6.0_03″
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Server VM (build 1.6.0_03-b05, mixed mode)
php -v
PHP 4.3.9 (cgi) (built: Apr 17 2009 19:13:06)
Copyright (c) 1997-2004 The PHP Group
mysql -V
mysql Ver 14.7 Distrib 4.1.22, for redhat-linux-gnu (i686) using readline 4.3
httpd -v
Server version: Apache/2.0.52
Hope this will help you to determine the versions of the softwares.
To verify the my.cnf parameter changes
/usr/libexec/mysqld –help –verbose
When I Asked God for Strength
He Gave Me Difficult Situations to Face
When I Asked God for Brain & Brown
He Gave Me Puzzles in Life to Solve
When I Asked God for Happiness
He Showed Me Some Unhappy People
When I Asked God for Wealth
He Showed Me How to Work Hard
When I Asked God for Favors
He Showed Me Opportunities to Work Hard
When I Asked God for Peace
He Showed Me How to Help Others
God Gave Me Nothing I Wanted
He Gave Me Everything I Needed
ISRO expressed that Chandrayaan-1 is not an expensive mission and in fact this moon odyssey will help the nation to update the technological expertise in order to explore the outer space and finally setting up a base on the earth’s natural satellite.
S Satish, ISRO spokesperson, while contradicting the critics, who wanted an answer behind the need to spend money for a mission to explore the moon, when many other countries have already done it, said, “Moon mission cost is less than Rs 400 crore, which is just ten per cent of annual budget of ISRO spread over many years.”
The cost of Chandrayaan-1 which has been scheduled to be launched on 22nd October is nearly Rs 386 crore, which includes Rs 100 crore for the establishment of Indian Deep Space Network (IDSN) at Byalalu. This will help to perform the task of getting the radio signals transmitted by future satellites, not just Chandrayaan-1. This mission is also India’s first unmanned lunar mission. The officials of ISRO feel that those who are against this mission are actually not fully aware with the facts related to the mission.
Satish clarified, “For example, previous moon missions have been undertaken by individual countries and it’s no secret that expertise of that nature is not shared. So, India had to do it by itself lest it would lose out in the race for the Moon.”
This mission will also help ISRO to better its technological expertise to a great level.
An ISRO official said, “There is also the pride factor. With China forging ahead in the space field, India cannot lag behind and miss the bus. Moreover, some kind of colonization of Moon cannot be ruled out in the coming decades. We have to have our presence.”
Hi,
Some times we see some messages to be rejected by postfix with erro RCPT from unknown
Solution.
RCPT from
unknown[some ip address]: 550 Client host rejected: cannot find your hostname
if you do
dig -x your ip +short
you will get some hostname as the dig output. (reverse dns)
Reverse DNS of your ip exists and points to some hostname, unfortunately the same host name does not exist in forward dns file. That is the reason why Postfix regards your host as “unknown”.
Don’t use reject_unknown_client in your postfix configuration. It may reject the valid mails also.
DESC:
When I send a message now to a user on my server from an outside account. I am getting this from qmail.
OBSERVATION:
You are probably forwarding mail to yourself.
SOLUTION:
Check your /var/qmail/control/smtproutes file to make sure you are not sending mail to a relay which is sending back to you, and also look at your forwarding files, .qmail, .qmail-default etc.
Resolution
Remove the trailing character from the recipient’s email address in the Address Book or in the To field.
example :
if ur sending to abc@example.com , you may be mistakenly using email address as abc@example.com. , a trailing dot can make this error to happen.
Allow incoming DNS request at port 53
Use following rules only if you are protecting dedicated DNS server.
SERVER_IP is IP address where BIND(named) is listing on port 53 for incoming DNS queries.
Please note that here I’m not allowing TCP protocol as I don’t have secondary DNS server to do zone transfer.
SERVER_IP=”123.108.230.184″
iptables -A INPUT -p udp -s 0/0 –sport 1024:65535 -d $SERVER_IP –dport 53 -m state –state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p udp -s $SERVER_IP –sport 53 -d 0/0 –dport 1024:65535 -m state –state ESTABLISHED -j ACCEPT
iptables -A INPUT -p udp -s 0/0 –sport 53 -d $SERVER_IP –dport 53 -m state –state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p udp -s $SERVER_IP –sport 53 -d 0/0 –dport 53 -m state –state ESTABLISHED -j ACCEPT
Hope it is easy to write iptables rule for a dns server
Hi ,
M back,
while installing the cpan modules for perl , i was getting the above error.
so following below solution worked out for it.
Use the cpan command-line tool. This can also be invoked via the command
perl -MCPAN -e shell
In the shell, type
install <packagename>
where <packagename> is something like Time::HiRes or Tk.
If it hangs for ages whilst trying to download files over FTP, or get errors like
LWP failed with code[400] message[FTP return code 150]
then try setting the FTP_PASSIVE environment variable before running cpan:
export FTP_PASSIVE=1
Just try this.
To use it:
touch /usr/local/etc/whitelist.txt && touch /usr/local/etc/blacklist.txt
chmod 755 /etc/init.d/firewall
chkconfig --add firewall && chkconfig firewall on
The script:
#!/bin/bash
# chkconfig: 345 30 99
# description: Starts and stops iptables based firewall
## List Locations
#
WHITELIST=/usr/local/etc/whitelist.txt
BLACKLIST=/usr/local/etc/blacklist.txt
#
## Specify ports you wish to use.
#
ALLOWED="22 80 25"
#
## Specify where IP Tables is located
#
IPTABLES=/sbin/iptables
##
#DO NOT EDIT BELOW THIS LINE
###
RETVAL=0
# To start the firewall
start() {
echo "Setting up firewall rules..."
echo 'Allowing Localhost'
#Allow localhost.
$IPTABLES -A INPUT -t filter -s 127.0.0.1 -j ACCEPT
#
## Whitelist
#
for x in `grep -v ^# $WHITELIST | awk '{print $1}'`; do
echo "Permitting $x..."
$IPTABLES -A INPUT -t filter -s $x -j ACCEPT
done
#
## Blacklist
#
for x in `grep -v ^# $BLACKLIST | awk '{print $1}'`; do
echo "Denying $x..."
$IPTABLES -A INPUT -t filter -s $x -j DROP
done
#
## Permitted Ports
#
for port in $ALLOWED; do
echo "Accepting port TCP $port..."
$IPTABLES -A INPUT -t filter -p tcp --dport $port -j ACCEPT
done
for port in $ALLOWED; do
echo "Accepting port UDP $port..."
$IPTABLES -A INPUT -t filter -p udp --dport $port -j ACCEPT
done
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
$IPTABLES -A INPUT -p udp -j DROP
$IPTABLES -A INPUT -p tcp --syn -j DROP
RETVAL=0
}
# To stop the firewall
stop() {
echo "Removing all iptables rules..."
/sbin/iptables -F
/sbin/iptables -X
/sbin/iptables -Z
RETVAL=0
}
case $1 in
start)
stop
start
;;
stop)
stop
;;
restart)
stop
start
;;
status)
/sbin/iptables -L
/sbin/iptables -t nat -L
RETVAL=0
;;
*)
echo "Usage: firewall {start|stop|restart|status}"
RETVAL=1
esac
exit $RETVAL
