my web server have too large bandwidth

l0pht · 02-10-2013, 09:47 AM

Hi,
i have a web sever
i configure iptables like:

Code:

# Generated by iptables-save v1.4.7 on Tue Jan 15 11:05:21 2013
*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT DROP [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 667 -j ACCEPT
-A INPUT -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 20:21 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 25 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 110 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 143 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 8443 -j ACCEPT
-A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 53 -j ACCEPT
-A OUTPUT -p udp -m udp --dport 53 -j ACCEPT
-A OUTPUT -p udp -m udp --dport 667 -j ACCEPT
#-A OUTPUT -p udp -m udp --dport 123 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 43 -j ACCEPT
#-A OUTPUT -p tcp -m tcp --dport 20:21 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 25 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 110 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 143 -j ACCEPT
-A OUTPUT -p tcp -m tcp --dport 8443 -j ACCEPT
COMMIT
# Completed on Tue Jan 15 11:05:21 2013

but i have a large traffic around : 100 GiB in month
i do not know how can i check it? which generate this traffic?
i install ossec and configure iptables
please guide me.
thanks

TB0ne · 02-10-2013, 10:57 AM

Quote:

Originally Posted by l0pht

Hi,
i have a web sever i configure iptables like:

but i have a large traffic around : 100 GiB in month i do not know how can i check it? which generate this traffic? i install ossec and configure iptables

There's nothing we can tell you based on what you posted. You have a web server, and see outgoing traffic...yep, sounds about right. But you haven't said if that's unusual for your website, what changes have happened recently, version/distro of Linux, or ANYTHING about what your server does. Have you checked the system logs? Apache logs?? Is this the same server you posted about before, that was your mail server?

Without details, we can't help.

l0pht · 02-10-2013, 12:48 PM

sorry for unperfect post.
OS is : centos 6.3
mail server installed with plesk : postfix
for web manager plesk has been installed and 4 website hosted.
in plesk traffice analyze just 2 or 3 gig displayed but in RX and TX in ifconfig for eth0 65 gig for this month showed and i should pay for this additional bandwidth.
i installed monitorix : http://130.185.72.199/monitorix/
in apache and messages log nothing is terrible.
what can i do ? how to see what is create this traffic?
thanks

TB0ne · 02-10-2013, 02:08 PM

Quote:

Originally Posted by l0pht

sorry for unperfect post.
OS is : centos 6.3
mail server installed with plesk : postfix
for web manager plesk has been installed and 4 website hosted.
in plesk traffice analyze just 2 or 3 gig displayed but in RX and TX in ifconfig for eth0 65 gig for this month showed and i should pay for this additional bandwidth. i installed monitorix : in apache and messages log nothing is terrible.
what can i do ? how to see what is create this traffic?

Think about what you posted.

You have a server running postfix, plesk, and you're hosting 4 websites
You posted before about your mail server being blacklisted for spam

Do you not see a potential issue? Your mail server may be churning it out, and for your plesk panel, is that showing your traffic for ONE website, or all of them? Again, if this just started happening, what has changed?

You need to examine all of the services running on that server, not just your apache logs. What does your mail server show? You haven't had monitorix running for very long, but you have activity on several ports; SMTP, POP3, HTTP, and MySQL. All of these services report to different logs.

unSpawn · 02-10-2013, 07:31 PM

Quote:

Originally Posted by l0pht

i installed monitorix

On a side note you may want to restrict access to that. No need to share that kind of nfo with the whole world.