how u use the iptable firewall to restrict ssh,telnet,ftp
- 9 Answers
- 19348 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / sins
simply use..... iptables -A INPUT -s <sourse ip or n/w u
want to block the services> -p tcp --dport <specify prt
number> -j REJECT/DROP/DENY
| Is This Answer Correct ? | 26 Yes | 0 No |
Answer / rajesh dwivedi
If you restrict ssh/telnet or ftp u have to write a rule
for example u have to restrict ssh
IPTABLES -A INPUT -p tcp -s <IP Address or Domain IP> --
dport <ssh port> -j REJECT/DROP
| Is This Answer Correct ? | 12 Yes | 0 No |
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 |
Answer / srivathsan
Just a small typo to the file name, it is '/etc/hosts.deny'
Thanks,
- Vathsan.
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / swapnil
if want to put on the INPUT then
iptables -A INPUT -s source -p protocol --dport destination
port -j DENY
if want to put the OUTPUT tables then
iptables -A OUTPUT -s source -p protocol --dport denation
port -j DENY
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / srivathsan
Followed by iptables command mentioned by Sins to restrict
domains for various services, pleaese run
$ service iptables save
$ restorecon /etc/sysconfig/iptables.
Also, you could block the domains by adding an entry inside
/etc/hots.deny like,
sshd: <Unwanted domain url>
:qw to save changes to the file.
- Vathsan.
| Is This Answer Correct ? | 4 Yes | 3 No |
Answer / nrupan mampilly
iptables -I INPUT -t filter -s source -p protocol --dport
portnumber -j REJECT
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / anil kumar pinnaka
chkconfig --level < run level for enabling the iptables > on
This will enables the ip table for the given run level.
so that these service will ge blocked.
| Is This Answer Correct ? | 1 Yes | 15 No |
cups stands for..?
How can i recover the linux system after it was crashed by step by step process..
how u use the iptable firewall to restrict ssh,telnet,ftp
How to ""Add"" not replace address to same network card other than the alias way.... ??????
what is meant by mysql clustering
How to give 2 different gateway IP addresses for 2 different interfaces in same system ?
am installed windows and later i installed ubuntu i want to unistall ubuntu can any one tel the procedure to uninstall ubuntu in my windows 7 please mail to me ---kiranpulsar2007@gmail.com and later i want to install ubuntu after uninstalling ubuntu tel the procedure for that also i dont know to patrition the hard disk drive please tel to them please reply
Without using w command how can Iknow that who are users logged in and what they are doing and whether they are idle or running mode?
I have accidently deleted my fstab... how do i recover/ regenerate the file?????? in rescue mode i cannot create a new file since the filesystem is readonly and could not mount in readwrite mode ?????????
User unable to login in server then how can u troubleshooting it? Example: server at Bangalore. in that server two users try to login in server. 1st user able to login. but second user unable to login so how can troubleshoot it ?
What are the main differences between RHEL4 & RHEL5?
what are acl permissions..? what is automation of jobs..?
Linux Commands 
