Fedora Security :: Block One Web Page?
Mar 13, 2009
What is the easiest way to block one specifiek web page?Can I use the file /etc/deny host, or should I use another program to do this?I have already search the web andfound iptables, but that is to difficult for me, and I found squid
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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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Jul 27, 2011
I recently set up a web server at home, using a non-standard port, due to my ISP blocking 80. I just checked my log files, and I see a TON of entries indicating that a file was not found "proxy-1.php", "proxyheader.php", etc. I do not have these files, not intend to have them as part of my website. I did a whois looking by IP address for several of these, and they all seem to come from an ISP in China. Is there a way to BLOCK any IP address outside the US (that is somewhat simple to do?)
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Aug 26, 2009
I want to block some ip address that are attacking my server and making my ssh port busy. On searching the google, I found
Code:
iptables -A INPUT -s ip_address -j DROP
I will add this rule in iptables. My questions are:
1) do I have to do
Code:
chkconfig iptables on
so that it load the iptables at boot. I am wondering why do I need this because iptables is already modified and it loads the iptables at boot time if firewall is enabled.
2) When we add the above rule, which file is modified? Another way, where are this rules stored? It is not in /etc/sysconfig/iptables and /etc/sysconfig/iptables_config.
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Aug 1, 2011
I have been trying to get pam_tally2 to block failed logins with ssh. No matter how many failed logins I do I can still log in with the correct password using SSH. Anyone have this working?
Here are the configuration I am using. I have put this in sshd and password-auth-ac.
auth required pam_tally2.so deny=3 file=/var/log/tallylog lock_time=180 unlock_time=1200 magic_root account required pam_tally2.so magic_root In the /var/log/secure I do see messages related pam_tally2 and the counter going up.
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Nov 23, 2009
On FC11 64 bit with Adobe flash plugin for Linux installed, I see segfault errors from "npviewer" in /var/log/messages. The only browser I have tried yet, Firefox, has glitches every now and then. Sometimes it shows the title of a page in a tab, but the page is blank. This can even happen when I try the Google main page. Is it true that npviewer has something to do with Adobe flash? Is there a way to fix the problem? If it is caused by Adobe flash, is there a different plugin that will replace Adobe flash player?
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May 10, 2010
How can I find page hit and page miss ratio in linux fedora core 12?
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Jun 8, 2009
I have apache httpd server on my Fedora 10I got 2 problems:First : I copied the web page files to its Document Root <var/www/html> & Disabled the default web page. But when I visit http:/localhost ,it shows up the list of files in <var/www/html> as if a ftp server browsed in web page. So how can I set http://localhost load my default web page index.html ?Second :I want to set up a web server on Internet through my router . I applied for DDNS account & input it into router correctly . I set virtual host in server to redirect any access from port 80 to 192.168.1.2:80 in LAN . Just for in case , I also download and running the DDNS software & installed it on PC 192.168.1.2 in LAN . My DDNS provider is oray.cn . It's a Chinese server provider . I don't think there is anything wrong with oray.cn . But if you need its information just visit oray.cn (Google can translate it for you). So I want to know did I miss something to set up a web server in this kind of situation
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Oct 31, 2010
on my linux server i have many websites but with difrent ips address, is some way to i can block all the ips with many connection (100+) just from my website not from all websites
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Mar 6, 2010
Is this how I would do that?
iptables -A INPUT -p tcp --destination-port 21 -d ! 168.192.1.2 -j DROP
This should block all incoming connections on port 21 from 192.168.1.2, correct? Thus preventing that IP from logging into my FTP.
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Jun 17, 2010
I'm trying to block an incoming URL. My ISP is hijacking 404 pages and annoyingly changing the URL line in the browser and flashing all sorts of popup ads. I just need it for incoming URLs which my router doesn't seem to handle. I'd prefer something packaged with Ubuntu 8.04, but anything simple will do. I know in KDE I could edit the kdeglobals file with:
[KDE URL Restrictions]
rule_1=open,,,,[URL],,false
rule_count=1
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Jul 19, 2010
Im running Centos 5.4 with a sftp server, and I�d like to allow all 172.16.0.x ip and 192.168.0.x ip and block everything else. Does someone have a good way to do this with IPTables or any other opensource FW?
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Feb 18, 2011
What's the best way in centos to block a user from accessing mysql. I don't want him to be able to run the mysql command, so just putting passwords up in mysql is not good enough. Mysql is running ad user=mysql, and i added the user in a different group by he is able to access mysql by typing in the command.
How can i block this command being availible for this user.
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May 7, 2010
I was wondering how to block attachments to gmail. I am running squid 2.7 stab9 with dansguardian 2.10, users authenticated from LDAP. I have configured the POST restrictions in Dansguardian which does block all attachments to hotmail/yahoo etc etc but attachments to gmail continue to upload.
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Apr 11, 2011
I am looking for an answer about how to allow just one trusted DHCP server and block others ?I am using Centos 5.5, iptables and dhclient.I have read that it is impossible to block DHCP Replay using iptables: URL...So how can I do that ? Maybe another dhcp client?
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Jul 1, 2010
here i would like to inform you that my company ask me to block facebook site at the work time it is: 08:00-12:30 and 14:00-17:30 in proxy server.i'm still confuse how to do!i need the details configuration in squid regarding how to block the sites
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Feb 15, 2011
For the last four days, I have been getting HIDS alerts like these:
Code:
152.2.x.x - - [15/Feb/2011:04:28:59 -0500] "PROPFIND /C%24.co HTTP/1.1" 405 231
152.2.x.x - - [15/Feb/2011:04:28:59 -0500] "PROPFIND /C%24.com HTTP/1.1" 405 232
[code]....
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Feb 23, 2011
Is it possible to block a subdomain or a one lower level directory URL access from other hosts or network ? I have a site running on my server and i want to block the particular directory under the domain, with the exception of loopback access? I mean the directory must be accessible from loopback/localhost.
[url] on port 10016(expect loopback)
[url] on port 10016 (expect loopback)
Code:
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Jun 30, 2010
I enabled ufw yesterday, and am finding log entries like:
Jun 30 13:07:51 xxxx kernel: [15702368.296557] [UFW BLOCK] IN=eth1 OUT= MAC=00:22:19:5e:8f:23:00:0c:db:fc:8b:00:08:00 SRC=xx.xx.xx.xx DST=xx.xx.xx.xx LEN=40 TOS=0x00 PREC=0x00 TTL=55 ID=47632 PROTO=TCP SPT=58875 DPT=80 WINDOW=65535 RES=0x00 ACK FIN URGP=0
What is puzzling is I did the command: ufw allow 80.
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May 7, 2010
How can one ensure that one is looking at the real web page? This is important if you are going to download an iso image or validate md5 sums.For example, the Ubuntu web page here:https://help.ubuntu.com/community/In...tion/MinimalCDHas information about certificates available in the URL bar. (If you look at the left of the URL, one can click on the certificate information.)Surprisingly, there is no such certificate information available at this other Ubuntu web page:
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Jan 25, 2010
I did one of the recommended port scans and all ports passed but failed on pinging. How do you turn pinging on & off with GFUW?
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Mar 26, 2010
My question is how to block a subdomain of a site. To make it as clear as possible, I'll give an example. I am regularly entering this arbitrary site [URL] which redirects me to this page [URL] and this index.html takes an image from a subdomain which is a subfolder of itself, that is: [URL]. What I am asking is blocking the images to be taken, but not the main page itself, i.e. to block www.somesite.abc/images/ without blocking the overall www.somesite.abc.
My idea was to use the /etc/hosts file by redirecting to loopback address:
Code:
127.0.0.1 www.somesite.abc/images
But it looks as if it doesn't affect things at all. Should I use it another way? Modifying /etc/hosts.deny maybe useful?
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Oct 2, 2010
I have noticed interesting problem. I use two browsers - Firefox and Konqueror. Konqueror is configured to use tor, Firefox not. Using Gufw I block all incoming and outgoing traffic and it works while using Firefox, I mean that I can't view any www site and it is ok. But if I use Konqueror I can establish any conection. How to understand this? Should I have different firewall while using tor?
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Jun 17, 2011
I want block https sites if suppose block the http it will opening in https.
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Jul 23, 2011
For example, can I write something to the effect: block all outbound UDP connections over port 53 except those going to IP 123.456.789. Or stated another way: Block outbound to port 53/udp NOT going to ip address 123.454.678Is it possible to do this? How would I write the argument?
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Jul 9, 2010
I want to block a domain name in sendmail server. I added the domain name and "REJECT"in /etc/mail/access file. What has to be done for the changes to take effect? when i run make command in /etc/mail dir i get following error : make: Nothing to be done for `all'.
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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.
[Code]...
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Nov 18, 2010
I run SSH on a publicly open server and see following attempts in /var/log/auth.log which I was told by some one could be port scanning attempts.(Not sure though)
Code:
Nov 18 23:50:19 server sshd[21716]: Did not receive identification string from 186.0.80.197
Nov 19 00:05:57 server sshd[24056]: Did not receive identification string from 85.108.110.66
How can I block above such attempts?
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Mar 25, 2010
how to block any IP address who failed to connect more than 3 ssh?
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Nov 5, 2010
My Problem is: I want to stop gmail access without blocking https. Yes in my squid proxy normal http://gmail.com 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 MY COMPANY GOOGLE MAIL PROGRAM.
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