Solved

Disable DNS Lookup

Posted on 2008-10-19
3
1,640 Views
Last Modified: 2013-12-16
Hi,

I am using vsftpd & experience high tarffic on udp port 53 which is DNS, I beleive this is when a log is writen to audit.log by the vsftpd. When i stop teh ftp server there is no more DNS traffic.
How can i disable the DNS lookup ? ther is no option through vsftpd & its not the syslog.
Can either be the PAM or some other OS options,

Danny
0
Comment
Question by:wefi
  • 2
3 Comments
 
LVL 3

Assisted Solution

by:leonjs
leonjs earned 200 total points
ID: 22753076
Quick question, are you running vsftpd on the inside network? Is it communicating with other machines in the inside network or is it communicating with machines outside the network.

If vsftpd is doing transactions with machines outside the network we can put a statement in the firewall to not all this kind of traffic from that host.

If the traffic is inside the network only in most cases it will never hit the firewall and you can make a similar change to your switches.

I am not familiar with vsftpd to say whether or not it has settings in the conf file for dns but i do think you could take out the nameservers in /etc/resolv.conf then this traffic will not be a issue anymore, assuiming this machine does not need dns at all.
0
 

Accepted Solution

by:
wefi earned 0 total points
ID: 22753108
Commenting out is a nic eworkaround which i can use but i was thinking there is a way to stop this.
I would need resolving at some point.

0
 

Author Comment

by:wefi
ID: 22753170
h
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Concerto Cloud Services, a provider of fully managed private, public and hybrid cloud solutions, announced today it was named to the 20 Coolest Cloud Infrastructure Vendors Of The 2017 Cloud  (http://www.concertocloud.com/about/in-the-news/2017/02/0…
Google Drive is extremely cheap offsite storage, and it's even possible to get extra storage for free for two years.  You can use the free account 15GB, and if you have an Android device..when you install Google Drive for the first time it will give…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question