Server :: How To Block HotSpotShield In Squid / Iptables

Nov 9, 2010

Does anybody know how to block HotSpotShield in squid or iptables?

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Networking :: Block IM With Iptables Or Squid?

Dec 24, 2008

in my office i have to block all messenger like yahoo messenger, windows live messenger, i have to block websites like, some more web sites. i need guidance through which i can accomplish this task through ip tables or through squid server. i can use squid but i had heard that squid blocks pop and smtp also. squid creates some problem in receiving and sending email. i am using red hat linux 4 box and installed squid having two ethernet card 1 is connected to adsl line and 2 is connected to switch. all clients will have proxy address of this linux box. guys need ur help ASAP.

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Server :: Block Cyrillic String In Squid?

Feb 22, 2010

Is it possible to block cyrillic string in squid? If use url_regex - sex it's OK, but when try секс(CYRILLIC alphabet) not working.

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Server :: Hot To Block Gmail Without Blocking Https In SQUID?

Apr 8, 2010

My Problem is: I want to stop gmail access without blocking https. Yes in my squid proxy normal [URL].. is not accessible. But gmail recently started https service by which user can still get access to gmail. I DONT WANT TO STOP https CAUSE ITS BEING USING BY OTHER PROGRAMS.

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Server :: Block Bit Torrent And Bit Commet Like Software's Using Squid?

Jan 7, 2010

i m using centos, i want to block the bit torrent and bit commet like softwares using Squid.

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Server :: Block Email Sending And Receiving Using Squid

Jun 17, 2010

i am using centos 5.4, running squid for proxy, i want to block email sending and receiving of proxy users to secure my data. how is it possible that the proxy user can only brows websites but he can not receive or open and send or save as draft to mail box.

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Server :: IPTABLES Port Redirecting To SQUID

Jul 12, 2011

i've got a software that uses a specific tcp port e.g 11111. i want to redirect all the traffic from 11111 to squid port 3128. i'm using the following commands to redirecting:

iptables -t nat -A PREROUTING -p tcp -m tcp -i eth0 --dport 11111 -j DNAT --to
iptables -A FORWARD -p tcp -m tcp -i eth0 --dport 11111 -j ACCEPT

my ubuntu server has two interfaces. eth0 is for local network (dhcp assigns ips) and eth1 is for internet. my ubuntu server acts as a gateway and as an authentication server for users.

at squid also i have the following configuration regarding my port:

acl myport port 11111 http_access allow CONNECT myport. my squid installation is not transparent as users need to authenticate in order to access the web.

my application is a windows application and of course is not working. i examined the packets with wireshark and i noticed that when the program tries to access the internet, squid replies with err_invalid_request (the packet contains that data). the program is trying to send some plain text via port 11111 and as far as i can image, somehow squid declines the data. i cant get rid off squid as i want to pass the traffic from squid. what is the problem?

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Software :: Get Squid Proxy Server To Block Websites Using Webmin?

Jul 17, 2010

i have been looking up ways to block websites in linux but most all of the free ones only block the sites the software makers want to (or you can't block just the sites you enter without blocking the sites that it wants to)i need to know how to block only websites i enter with squid using webmin

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Fedora Security :: Add A Rule In Iptables On Squid Server?

Mar 4, 2011

I am using squid on my fedora box as a proxy server.By default the iptables (Firewall) service is on.To allow web pages to my client machines i stop the iptable service.

#service iptables stop

By doing it client computers start browsing.kindly how can I add a rule so that without stoping firewall client compter work perver IP address is

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Security :: Configure Squid Server To Block Anon Proxy Sites?

Jul 22, 2010

I have setup a squid server on Rhel5.4. I would like to know how I can configure my squid server to block anon proxy sites.

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Server :: Use Iptables To Block Multiple Requests From The Same Ip Within A Certain Time Frame?

Oct 17, 2010

I run a small home server (Debian 4), which acts as my gateway to the internet (ie, firewall) and runs a web server, dhcp, dns, and acts as a file server to the rest of the machines on my home network. Now I know it's never a smart idea to have all those services running on the same machine that is acting as a firewall, but I don't fancy running multiple servers just for home use, as it's mainly allowing me to learn system administration.

I noticed a few days ago that my internet had become unbearably slow, to the point where I could sometimes not load web pages. I spent a while searching through log files on my gateway, to try and find out what was eating up all of my bandwidth. When I came to apache's access.log file, I was confronted with this:

Code: - - [17/Oct/2010:06:25:10 +0100] "GET HTTP/1.1" 200 36921 "-" "Mozilla/4.0 (compatible; M$ - - [17/Oct/2010:06:25:11 +0100] "GET HTTP/1.1" 200 58681 "-" "Mozilla/4.0 (com$


Multiple requests to my server, for totally random websites. I didn't even know it was possible to make those types of queries to a webserver. The only thing that is on the web server is a browser based torrent client. I have only shown a small snippet of the log file, but there are around 90k lines to different web addresses, from many different IPs. What I want to know, is what is happening? :S Why is someone querying MY web server, for web sites totally unrelated to it? And most of all, how can I stop it. My initial was to try and use iptables to block multiple requests from the same ip within a certain time frame, which I think would work as the server shouldn't really get many queries from external networks.

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Networking :: Squid With Iptables - Make Clients To Browse Internet Only From Proxy Server?

Jun 14, 2010

i have the following ip assignments

fedora (iptables)
eth0 -private :
eth1 -public :
squid proxy
my clients range

how can i make my clients to browse internet only from proxy server my network is NAT 'ed. Please specify a iptable rule to allow internet access for my clients to browse ONLY if they come through proxy server.

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Server :: Squid Block Webmail / Can Not Access The Webmail?

Nov 24, 2010

I am using squid proxy in my office , now I can not access the webmail url is url.

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Networking :: How To Block Any Web Site In Squid

Jan 2, 2011

I am using Squid as a proxy server red hat Linux.I want to block some specific web sites like facebook,..... under squid .Please guide me that how can i do it and under which header should i write the script ?

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General :: Block Mac Address On Squid?

May 25, 2010

how to block PC in Squid using Mac Address. I tried as in /etc/squid/squid. conf

acl block arp 00:13:45:d3: 24:e4
https_access deny block

but it give me error as like: - (This is the output of # squid -k parse) aclParseAclLine: Invalid ACL type 'arp' FATAL: Bungled squid.conf line 1234: acl block arp 00:13:45:d3: 24:e4 squid Cache (Version 2.5.STABLE6) : Terminated abnormally

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Software :: Any Way To Block Gtalk In Squid

Mar 27, 2009

I want to block gtalk in squid, I have tried blocking ports but it didn't help.

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Security :: Iptables To Block Ip From Ftp?

Mar 6, 2010

Is this how I would do that?

iptables -A INPUT -p tcp --destination-port 21 -d ! -j DROP

This should block all incoming connections on port 21 from, correct? Thus preventing that IP from logging into my FTP.

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Debian Configuration :: Can't Get Squid To Block Webpages?

Mar 23, 2010

I am having problems while testing out squid proxy server. I just can't get it block anything. So, I'm running Debian lenny on my Virtualbox and Squid on it. I'm having windows 7 on virtualbox too and they can ping each other and the webserver on debian (apache2) is working fine. The problem is i can't get squid to block webpages. I have the correct settings on windows proxy settings, but i'm not so sure about squid. I want to block lets say www . xxx. com for example. So I add to the main configuration file:


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General :: Block A Specific Content Using Squid?

Aug 24, 2010

In Iran there is a famous "access denied page" that redirects you to a strange page with a lot of HTML errors and lol, telling you RTFM about ridiculous Internet laws.I want to filter the contents of the page, because the page IP, URL, ... are all unknown.I don't know much about squid configuration scripts.I can read but cannot write

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Security :: Gmail Chat Block By Squid?

Jan 17, 2010

how to disable the gmail chat? My means to say that when we login to gmail , after that the chat will open, I want to disable that chat. am using Redhat 9 and squid stable 2.5 version. I have tried the things mentioned below, but chat is still working.


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Security :: Squid - Block Different Users Different Sites?

Feb 6, 2010

Example I have 3 user list and 3 file with block site names

acl group1 src
acl group2 src
acl group3 src


I've moved your post here to its own thread. Please don't resurrect dead threads. --win32sux

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Fedora Security :: Iptables - Block Everything From Getting In My Pc

Mar 17, 2009

What i wanted to do was block everything from getting in my pc but still be able to surf the web and still use instant messenger.

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Ubuntu :: How To Block All Outgoing With IPTables

May 10, 2010

I want to block all outgoing traffic with iptables and only allow a few specific websites. I would like to get the code to do so and also to revert the changes in case I want to unblock them.

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Networking :: Block Web Access With Iptables ?

Apr 25, 2010

Just wondering if it is possible to block web access on a certain ip address with iptables.

Iv seen guides for blocking web traffic on a whole network but i want to just block a single host from accessing the web.

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Networking :: Block The Urls With Iptables?

Feb 22, 2010

I have a server with slackware 12 and i try to block 2 web sites but without success. I write in iptables rules /etc/iptables.conf

iptables -A INPUT -s -j DROP
iptables -A OUTPUT -d -j DROP

but no effect. What rule i must write to block url`s?

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General :: Block And Allow IP Using Iptables In RedHat 4.0?

Aug 3, 2009

I have blocked below IP by using iptables command in RedHat Linux 4.0.


iptables -A INPUT -s -j DROP

It's now totally blocked and can't get access into web or internal network. how I can un-block that IP, so that it can again starts it's normal operation.

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Ubuntu Servers :: How To Block Torrents By Using Squid Or Firewall

Jan 5, 2010

I've been all around the net and can't find a "simple" answer how to block our LAN users from downloading torrents. Is it really that difficult?

Here's our setup:

1. The Server's Configs:

2. sudo gedit /etc/squid/squid.conf

3. sudo gedit /etc/rc.local (to start Firewall rules on bootup)

4. Server NOT a DHCP Server

5. No other iptables rules are configured, just the above ones.

Before in a 1 NIC setup, I blocked Workstations MAC addresses in the Router + Squid Proxy Server (Not Transparent), it worked, but some Online Java Apps didn't work and users can't send/receive email so I abandoned the method.

Now, I installed transparent Squid Proxy with 2 NIC cards, it works, but workstations can still download torrents! I know Squid doesn't block ports, right? So the answer must lie in Iptables Firewall? I basically use Squid just to deny access to Facebook, Friendster, or other "unproductive sites".


How to block torrent downloading by using a Firewall? Or is there another "simple" way?

I've heard that it's better just to allow regular ports (80, 22, 465, etc...) then block all the rest, this way, you can prevent unnecessary ports.

I'm not an Iptables/Firewall expert so can you pls. explain it a bit more detailed if that's the case.

I'm also aware of just telling our users NOT to download torrents, but I just want to prohibit it entirely.

I know I will be the most "uncool" employee in our office.

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Red Hat / Fedora :: Want To Block Yahoo Web Chat Through Dansgurarian(squid)?

Jun 1, 2010

i had googled a lot n come to know that i need to block dnslookups for these urls and and these should return i havent have DNS configured so tried by making an entry in etc hosts filebut unforunately it didnt worked

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General :: Block Gtalk In XP Client Using Squid Proxy

May 12, 2010

I have recently configured squid proxy server in rhel5 so now I am able to blocking some websites ok, but still I have one problem how can I block gtalk by using squid proxy, one more thing I blocked gmail so now client xp systems are not logging into gmail but still they using gtalk to chatting the things to others. So ultimately I need to block gtalk also by using squid proxy.

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Security :: Squid Proxy Block Sites Or Domain

Apr 5, 2010

I have a problem with sites or domain blocking by squid proxy server in rehl 5. I have trying lots of time but i'm not succed.pls help me how to block sites or domain in rhel 5.

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