LinuxQuestions.org
Latest LQ Deal: Latest LQ Deals
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices


Reply
  Search this Thread
Old 01-26-2015, 06:18 PM   #1
battles
Member
 
Registered: Apr 2014
Distribution: Debian GNU/Linux 7.5 (wheezy)
Posts: 258

Rep: Reputation: Disabled
--reject-with icmp-port-unreachable question


I am currently blocking port 80:
iptables -A INPUT -p tcp --destination-port 80 -j DROP

What I was wondering, if I use the REJECT below, is a message displayed in the browser of the REJECTed? Is there any way to send back a personally scripted message?

iptables -A INPUT -p TCP --dport 80 -j REJECT --reject-with icmp-port-unreachable tcp-reset

Thanks
 
Old 01-27-2015, 04:03 AM   #2
linosaurusroot
Member
 
Registered: Oct 2012
Distribution: OpenSuSE,RHEL,Fedora,OpenBSD
Posts: 982
Blog Entries: 2

Rep: Reputation: 244Reputation: 244Reputation: 244
If you want to create the message you've got to send TCP data to their browser giving the HTTP code 403 or whatever.

Packet level actions won't do that but will leave their browser showing its own version of "connection failed" or just a blank screen or whatever the browser programmer decided on.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
PF_PACKET socket and 'Port unreachable' ICMP messages DavidA Programming 5 10-23-2012 12:55 PM
[SOLVED] Snort Signature: ICMP Destination Unreachable Port Unreachable very noisy mhollis Linux - Security 4 08-15-2011 02:01 PM
IPTABLES question - how do you reject icmp? Thaidog Linux - Networking 12 12-06-2007 11:16 AM
ICMP Port unreachable Ciralia Linux - Software 1 06-14-2007 10:20 AM

LinuxQuestions.org > Forums > Linux Forums > Linux - Networking

All times are GMT -5. The time now is 03:20 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration