Comments on: How Do I Block an IP Address on My Linux server? http://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/ Every answer asks a more beautiful question. Fri, 10 Feb 2012 19:55:56 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Alessiohttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-67641 Alessio Sat, 28 Jan 2012 15:16:33 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-67641 I have a csv file with the ip list, I can block all ip in this file? I have a csv file with the ip list, I can block all ip in this file?

]]> By: lalushttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-64478 lalus Wed, 16 Nov 2011 02:29:37 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-64478 i want my client with ip 192.168.1.1 can access www.google.com only not else. whats is the iptables command? Thanks i want my client with ip 192.168.1.1 can access http://www.google.com only not else.
whats is the iptables command?

Thanks

]]> By: ronaldhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-62853 ronald Tue, 27 Sep 2011 07:19:08 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-62853 thanks for the short lesson of the command. very help full. thanks for the short lesson of the command. very help full.

]]> By: barney stinsonhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-62454 barney stinson Thu, 15 Sep 2011 11:40:25 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-62454 Not blocking any of the addresses in the range: iptables -A INPUT -s 5.5.5.0/22 -p tcp --destination-port 80 -j DROP iptables 1.4.10 (android) Thoughts? Not blocking any of the addresses in the range:

iptables -A INPUT -s 5.5.5.0/22 -p tcp –destination-port 80 -j DROP

iptables 1.4.10 (android)

Thoughts?

]]> By: barney stinsonhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-62451 barney stinson Thu, 15 Sep 2011 09:12:34 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-62451 How can I block connections ONLY TO port 80 of a range of addresses? I do not want to create 300 single rules for.port 80. Port constraint required as must allow traffic to port 443 How can I block connections ONLY TO port 80 of a range of addresses?

I do not want to create 300 single rules for.port 80. Port constraint required as must allow traffic to port 443

]]> By: Nivethahttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-61598 Nivetha Tue, 16 Aug 2011 08:28:24 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-61598 how can i check whether the iptables is blocked or not how can i check whether the iptables is blocked or not

]]> By: shadowtrooperhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-59407 shadowtrooper Sat, 14 May 2011 12:45:02 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-59407 hi i am new with IP tables stuff and i have a problem.... i have a pc Contain a fedora OS and i want to make a small network (4 PCs Contain XP OS) and using the pc of fedora OS as a firewall i want to Prevent the ping (i think it called(ICMP)) in the privat network and prevent one of the PCs from Browsing internet(prevent port 80 and 81 as i think) and i still don't know how to make the internet go Through the firewall to the private network... note: WAN = eth0 LAN = eth1 any one can help plz!!!! hi
i am new with IP tables stuff and i have a problem….
i have a pc Contain a fedora OS and i want to make a small network (4 PCs Contain XP OS) and using the pc of fedora OS as a firewall
i want to Prevent the ping (i think it called(ICMP)) in the privat network and prevent one of the PCs from Browsing internet(prevent port 80 and 81 as i think)
and i still don’t know how to make the internet go Through the firewall to the private network…

note: WAN = eth0
LAN = eth1
any one can help plz!!!!

]]> By: Benhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-57292 Ben Thu, 14 Apr 2011 22:59:59 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-57292 I tested this and blocked the ip from my phone through ip tables. It didn't block anything i could still ssh in i could still browse the website I host on this server and connect via ftp so I went into my iptables file and typed this -A PREROUTING -s PhoneIPAddress -j DROP saved closed service restart iptables and then my phone had no access what so ever. Is this just a different way or am I going to run into problems by blocking ip addresses at the PREROUTING level I tested this and blocked the ip from my phone through ip tables. It didn’t block anything i could still ssh in i could still browse the website I host on this server and connect via ftp so I went into my iptables file
and typed this
-A PREROUTING -s PhoneIPAddress -j DROP
saved closed
service restart iptables
and then my phone had no access what so ever. Is this just a different way or am I going to run into problems by blocking ip addresses at the PREROUTING level

]]> By: Mikeyhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-57034 Mikey Sat, 02 Apr 2011 02:23:45 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-57034 iptables -I INPUT -s ! {IP ADDRESS} -j DROP The Bang character (!) basically means NOT, so the line above would say drop ALL packets NOT going to ip address iptables -I INPUT -s ! {IP ADDRESS} -j DROP

The Bang character (!) basically means NOT, so the line above would say drop ALL packets NOT going to ip address

]]> By: Adityahttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-56613 Aditya Wed, 23 Mar 2011 21:29:10 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-56613 Hi Vivek This site is very useful and provides "to the point" information. Keep up the good work. Aditya Unix aficionado Hi Vivek
This site is very useful and provides “to the point” information. Keep up the good work.

Aditya
Unix aficionado

]]> By: Mehmet Karabuluthttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-55247 Mehmet Karabulut Sat, 29 Jan 2011 22:05:18 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-55247 iptables rules explained very clearly. Thank you. iptables rules explained very clearly. Thank you.

]]> By: nackshttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-50446 nacks Sat, 30 Oct 2010 13:53:50 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-50446 Try $IPT -I INPUT -s IP_ADDRESS -j DROP Try $IPT -I INPUT -s IP_ADDRESS -j DROP

]]> By: Vivek Gitehttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-49013 Vivek Gite Wed, 25 Aug 2010 05:16:03 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-49013 Do you see any specific error? Do you see any specific error?

]]> By: Zach Brownehttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-49003 Zach Browne Tue, 24 Aug 2010 09:23:52 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-49003 I am having some problems leaving a remark. I've attempted refreshing several times as well as closing and opening opera. Is anyone else having a problem on this article? I am having some problems leaving a remark. I’ve attempted refreshing several times as well as closing and opening opera. Is anyone else having a problem on this article?

]]> By: rohit singhhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-47843 rohit singh Wed, 16 Jun 2010 05:19:10 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-47843 i am not able block one particuler ip address plz suggest me i am not able block one particuler ip address plz suggest me

]]> By: faisuhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-46114 faisu Wed, 24 Feb 2010 04:29:30 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-46114 hello how to setup youtube access for specific ip through acl ???? hello

how to setup youtube access for specific ip through acl ????

]]> By: Bappyhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-46045 Bappy Fri, 19 Feb 2010 02:55:51 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-46045 Do anyone know how to block IP like that > 202.56.***.*** that means under 202.56. all IP will be blocked. Regards, Admin Centriohost.com Do anyone know how to block IP like that >
202.56.***.*** that means under 202.56. all IP will be blocked.

Regards,
Admin
Centriohost.com

]]> By: Moulihttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-45799 Mouli Tue, 02 Feb 2010 15:18:37 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-45799 Hi !! I have RHEL5 installed and i have tried the command #iptables -A INPUT -s IP ADDRESS -j DROP. i hv logged into root and opened terminal…..and then typed this… bt it didn’t work!! Plz tell me the actual way to run this command… i really need this very urgently… Hi !!
I have RHEL5 installed and i have tried the command #iptables -A INPUT -s IP ADDRESS -j DROP. i hv logged into root and opened terminal…..and then typed this… bt it didn’t work!! Plz tell me the actual way to run this command… i really need this very urgently…

]]> By: ecommyhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-45376 ecommy Thu, 31 Dec 2009 10:46:01 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-45376 why it's working only if I use it like that? (not iptables -A INPUT -s 86.34.187.86 -j DROP) iptables -I INPUT -s 86.34.187.86 -j DROP why it’s working only if I use it like that? (not iptables -A INPUT -s 86.34.187.86 -j DROP)
iptables -I INPUT -s 86.34.187.86 -j DROP

]]> By: kidhttp://www.cyberciti.biz/faq/how-do-i-block-an-ip-on-my-linux-server/#comment-43141 kid Sat, 15 Aug 2009 20:32:14 +0000 http://www.cyberciti.biz/faq/faq/how-do-i-block-an-ip-on-my-linux-server.php#comment-43141 how to block all ip and allow access to only one ip? how to block all ip and allow access to only one ip?

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