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:
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'.
View 1 Replies View RelatedI 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.
View 3 Replies View Relatedtell me the command for iptable rule to add in Chain RH-Firewall-1 to block ftp port & the ftp server was configured in public ip address,i searched in google but i did'nt get the exact command for iptables rule in Chain RH-Firewall-1.
View 3 Replies View RelatedI have a caching dns and SNMP ( MRTG ) both on the same server how can I permit dns and snmp traffic in INPUT chain?? I have tried the following:
iptables -A INPUT -p udp --sport 1024:65535 --dport 53 -j ACCEPT
iptables -A INPUT -p udp --sport 53 --dport 1024:65535 -j ACCEPT
iptables -A INPUT -p udp --sport 1024:65535 --dport 161:162 -j ACCEPT
iptables -A INPUT -p udp --sport 161:162 --dport 1024:65535 -j ACCEPT
I don't know if FC15 has the iptable rules like the ones shown below by default or not but I wanted a second opinion about the safety they provide. Why is icmp accepted (INPUT rule 1) from/to all ip? and is it better to remove this rule? When the protocol is all (INPUT rule 2), does it mean from ip layer and above?? and is it required/safe to have this rule? The 3rd rule is to allow tcp-port 22 connections (ssh) to/from all ip. I think this is correctly set and required. The 4th rule in INPUT table rejects pings with the icmp-host-prohibited message; which I don't think is the best solution. Instead it can be set to silently drop icmp packets. Then, the FORWARD table uses reject instead of silent drop for forwarding icmp ping packets.
Code:
what do you think about the new rules and their order?
I've configured iptables to act as a stateful firewall, but instead of simply rejecting packets I'd like to waste a potenial hackers time by droping any packet that would otherwise be returned. Are my rules sufficient or have I somehow opened myself up to an attacker by trying to write these rules myself?
View 3 Replies View RelatedI need help creating an iptable rule. The iptables are installed on my router. My router also connects to a "hide my a**" vpn account
at 79.142.65.5:443 The goal is to somehow force the traffic to go through the vpn, because what sometimes happens is, the vpn connection drops (for what ever reason) and my real ip becomes exposed. Basically, I want to block "myself" from accessing the Internet when not connected to the vpn because of privacy concerns.
Below is my iptables. It has the 3 default chains and it also has many custom user chains. I need to know what kind of a rule to add, What interface to apply it to (lo,tun0,br-lan,eth1) and the correct chain to insert into.For example, you could tell me something like:
Quote:
FORWARD chain, change rule 1 to
iptables -R FORWARD 1 -j zone_wan_MSSFIX -p tcp --destination-port 443 -i eth1
Obviously, That was just a guess, I need someone that knows iptables to help me.
Code:
Chain INPUT (Policy: ACCEPT)
Rule # Traffic Target Prot In Out Source Destination Options
Rule 1 72.95 KB DROP all * * 0.0.0.0/0 0.0.0.0/0 state INVALID
Rule 2 1.11 GB ACCEPT all * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
[code].....
I'm trying to set up a firewall at the moment that allows access to my custom SSH port from only my friend's url (they have a static url but dynamic IP). I find iptables a bit of a nightmare and was hoping to use UFW for most of my day to day firewall maintenance and just make a few extra iptable rules to cover exceptional circumstances like this. Fortunately it seems UFW allows this with /etc/ufw/before.rules and /etc/ufw/after.rules. So at the moment I'm just trying to get the basic iptables rules right. As I say I'm not very good with iptables, does this look right?
Code:
## Drop Default SSH port access With Logging
iptables -N SSH_DEFAULT
iptables -A INPUT -p tcp --dport 22 -m state --state NEW -j SSH_DEFAULT
[code].....
I have a server that is on a high port number, and people want it on port 80. For root exploit issues people say the server can not run as root. So to solve things I want to redirect port 80 to a high port number, say 12345 on the machine. This has been discussed all over the web, so I find I need to do this:
/sbin/iptables -t nat -A PREROUTING -p tcp -d 123.45.67.89 --dport 80 -j REDIRECT --to-ports 12345
/sbin/iptables-save > /etc/sysconfig/iptables
And I do this, an voila things work for the whole world. All machines in the world can see the server on port 80 on the machine.Except, on the machine itself. On the machine 123.45.67.89, I try to get to the server on 123.45.67.89:80, I get a can't connect error. On the machine if I try 123.45.67.89:12345 I can connect.What am I doing wrong here? I don't want localhost network really, I want the ip address and port, but I want the forwarding to work on the local machine. But it doesn't...
I recently set up a ftp server in my house running a dyndns service so I can get to it from the outside. I called my isp to get some help in setting up the router to forward port 21 from the outside to that box, and in short we had some problems. Long story short, they ended up bypassing the router itself, and now the line running to the box is its own fixed external ip. Naturally I want a pretty darn good iptables setup for this. The box runs proftpd and so far my iptables only accepts local loopback and port-21. (I left port 80 closed as its only purpose is to be a standalone ftp server) But I know there must be a safer rule for port 21, as right now its just wide open. Anyone have any ideas on how to make this a bit safer? Also would that command be fine for any of the linux machines im connecting to it from the outside too?
View 3 Replies View RelatedI see on my webserver some logs as follows Quote:
203.252.157.98 - :25:02 "GET //phpmyadmin/ HTTP/1.1" 404 393 "-" "Made by ZmEu @ WhiteHat Team - www.whitehat.ro"
203.252.157.98 - :25:03 "GET //phpMyAdmin/ HTTP/1.1" 404 394 "-" "Made by ZmEu @
[code]....
Quote:
-A RH-Firewall-1-INPUT -s 10.12.0.0/16 -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
Ex- 10.12.0.0/16, 172.150.0.0/16, 192.168.20.0/24
How can we add multiple sources network address in the above INPUT chain?
Can you show me how to block a domain from local access through URL Filter?ay be an example is a very good start.
View 10 Replies View RelatedIn our mail server we are taking lots of hits. In the maillog there's a hell of rejected mail like these:
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I Have a script which search for the IP and block those. I'm having problem if IP block the RCPT IP's.
Instead i want to block the sender domain, like in this example, shareme.com. What's shall i modify in my script to do this?
Code:
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
View 5 Replies View RelatedIs 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.
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
View 1 Replies View RelatedWhat 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.
View 2 Replies View RelatedI'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
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?
View 10 Replies View RelatedWhat'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.
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.
View 1 Replies View RelatedI 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?
View 4 Replies View Relatedhere 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
View 2 Replies View RelatedFor 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]....
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.
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?)
View 5 Replies View RelatedI did one of the recommended port scans and all ports passed but failed on pinging. How do you turn pinging on & off with GFUW?
View 9 Replies View RelatedMy 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?