Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...

  1. Categories >> Software >> Operating Systems >> Linux >> Linux AllOther
  2. Suggest New Category

how u use the iptable firewall to restrict ssh,telnet,ftp

Question Posted / saurabh makkar

Answer Posted / saurabh makkar

For SSH
iptables -A INPUT -s <sourse ip or n/w u
want to block the services> -p tcp --dport <22> -j
REJECT/DROP/DENY

For Telnet
iptables -A INPUT -s <sourse ip or n/w u
want to block the services> -p tcp --dport <23> -j
REJECT/DROP/DENY

For FTP
iptables -A INPUT -s <sourse ip or n/w u
want to block the services> -p tcp --dport <21> -j
REJECT/DROP/DENY

Is This Answer Correct ?    6 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is the difference between ext3 and ext4?

2405

As a system admin i want to know some things what are the troubleshooting issues we are facing frequently and what are the tickets will be raised.

1507

How to Trouble shoot performance issue in RHEL administration ? please give to one example

2003

This question is belong to linux support. "one of my customer told to me, my application is getting slow response". how to resolve the issue. what are the steps you will follow to resolve the issue.

1832

1. User gaves df -h and the system get hanged. why ? 2. what is the hardlink and softlink mount ? 3. why is portmape should be started ? 4. what is nologin option 5. how to restrict users from accessing nfs ? 6. what is the difference between cpio and tar 7. what are the kernel parameters ? how to find out it ? 8. why we use sysctl.conf ? 9. if we gives init1 from multiuser runlevel, will it affect other users who already logged in to the system ? 10. what will be the available space to use after configuering raid5 with 5 disks each having 5gb spce ?

2733

What are the differences between FTP , NFS , SAMBA servers explain separately.

1174

what is difference between  TFTP abd FTP?

2104

why /etc/shadow file do not have any permission ?

1517

Why is it suggested to disable journalism in ext4 filesystem?

3533

How to catagories tickets in RHEL, which tickets are belong to PROBLEM, INCIDENT and CHANGE management? please given to me with examples

1727

i installed clustering packages.When i try to run it getting LUCI error...what is it..??

2337

what is the gate of ftp server in redhat linux?

1854

I want to configure production interface and manage interface, how to configure both interfaces in Linux. please post the answers

1968

What is Hard mount and soft Mount?

1731