I 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:
In my new Centos i am not able to add iptable rule. iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128bash: iptables: command not foundI am getting this error. I use this rule to forward ports to squid.
i'd like to know how many rule can manage iptable. I'm asking that because i'd to drop all traffric from my localnet to porn site. I've a database of porn site witch contain about 900 000 domains. I know there are solutions like squidguard. But for my linux box i'd to use iptable to prevent users access to porn site and other blacklist site.
I have installed squid as my proxy server in ubuntu 10.04 standalone system..Why i have installed squid in standalone sytem is, my friends used to access my system to browse sites and download files..So i have installed squid to block porn sites and downloads..But they simply bypass the proxy by disabling it..I know there is some way to force all browsers to go through proxy using iptables..But how to acheive it..? Is the below command suits my need..?If not what modification should i do..?
I have samba running on 192.168.100.209 and I am trying to open samba ports only for hosts in 192.168.100.0/24 network.. I have added following rules to iptables. But still I am not able to connect from machines from 192.168.100.0/24 network
my request is that i have to make all out bound internet connection should go from proxy server , not directly to firewall. Please specify a iptable rule for blocking direct internet access. my clients ip ranges from 192.168.2.20 to 192.168.2.47
tell 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.
Question (and Google results aren't making this clear): Ubuntu has both iptables & ip6tables installed. 1. If I set a rule in iptables, does that rule also apply to ipv6, or just ipv4?
2. If "no" to above, then it would be prudent to *also* set ip6tables rules as well if I want to maintain an active firewall, correct?
3. Does ip6tables rules have the same syntax and behavior (more or less) to iptables rules - i.e. can I just copy my iptables rules & change "iptables" to "ip6tables"?
4. Any gotchas or issues that I should be aware of?
Currently I'm looking into implementing mod_security on all our apache servers. The installation on CentOS 5.5 comes directly with the "Core Rule Set" by the mod_security devs (curiously Debian and Ubuntu do not carry these) They also offer the Enhanced Rule Set for mod_security in a commercial package [URL] The main point there in their info link is the first point
Quote:
Tracking Credit Card Usage as required by the Payment Card Industry Data Security Standard However acc. to this wiki article ( http://en.wikipedia.org/wiki/Payment...urity_Standard ) that specific requirement isn't stated anywhere, as well as my colleague who's working on the PCI-DSS compliance for our code/servers/etc. mentioned that he hasn't heard of this specific requirement either. So my question would be if anyone has any experience with their ERS package and if it's needed for the PCI-DSS compliance compared to the requirements given in bullet points @ wiki article.
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?
So I am new to ubuntu and am trying to work with "iptables". I have ubuntu version 10.04, in the terminal I try to create a new iptable by writing: iptables -N chain but the response is: FATAL: Error inserting ip_tables......... also it says "you must be root", what does root mean?
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)
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:
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?
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'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
Do I have to create a rule for: Code: $IPT -A fwalert -p tcp --tcp-flags SYN,ACK SYN,ACK -m conntrack --ctstate NEW $RLIMIT -j LOG $LOGLIMIT --log-tcp-options --log-level 4 --log-prefix to drop rather than log if my table has a default policy of drop with : Code: $IPT -t fwalert -P DROP
I have a netbook (MSI Wind U100 rebrand) that has one of those card readers built into the handrest. The thing is I've never used it once, and it keeps popping up in powertop as waking the cpu when it should just shut up and be quiet.Aside from breaking open the case and tearing it out, the immediate solution is to browse to /sys/bus/usb/devices/usb1/1-6/ and pipe 1 to the file remove. That disables it until system reboot or resume, at which point I have to do it all over again.
Code:
$ echo 1 | sudo tee /sys/bus/usb/devices/usb1/1-6/remove
Now I'd like to create an udev rule to make it not get initialized at all. A quick Google search found me this article on creating udev rules, and after toying about with the udevadm tool I managed to produce the attributes/properties of the device.
Code:
zorael@lethe:/sys/bus/usb/devices/usb1/1-6$ udevadm info -a -p $(pwd)
Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed by the attributes of the device and the attributes from one single parent device.
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?
I guess this is the right place to put questions about iptables, so forgive me if it is not.I have a MySQL database which I need to allow connections to: 1 - the internal network; 2 - the web server (Apache) connections;3 - A user who is out of this network in a range of dynamic IP.Let's suppose the range IP for this user is 179.4.247.0-179.4.247.254 and the server; where is MySQl and Apache is 60.22.30.232. This user will use the windows client MySQL tool to make connections into this database.
So I think these rule below allow connections to the internal network and apache: iptables -A INPUT -i eth0 -m state state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -i eth1 -m state state ESTABLISHED,RELATED -j ACCEPT
I'm trying to configure auditd to monitor "strange" events with apache2 weberver on Wheezy (though same problem occurs on Jessie), tried both with "vanilla" 3.2 and backports 3.16 kernel I am actually using.
Here's auditd rules I have problem with:
Code: Select all-a exit,never -F arch=b64 -S stat -F path=/var/www/server-status -k web -a exit,always -F arch=b64 -S stat -F uid=www-data -F success=0 -k web
So to recap, I want to log stat syscall failures for www-data user, but excluding some "known" issues, such as that "/var/www/server-status" (after a2enmod status, /server-status path can be accessed for statistics, though apache2 still tries to find physical file for that path and fails).
