iptables multiport

Iptables firewall, iptables1 Location Use vim/usr/sysconfig/iptables2. Start, close, and save Service iptables stop Service iptables start Service iptables restart Service iptables save 3 Structure Iptables-> tables-> ch

Iptables basic CommandsBefore we introduce the complex firewall rules, let's start with some simple materials, so that we can have some simple understanding of Iptables's most basic commands.The first thing to note is that the iptables command must run as root, which means you need to log in as root or have permission to use Su or sudo-i to get the root Shell. We use sudo in the following, which is also the

and ACK tokens that are set while the SYN tag is not set, and note the comparison with example 1.3.3 Explicit matchingThis matching method requires additional kernel modules to provide support, you must manually call the "-M module name" In the form of the corresponding module, before you can set the matching criteria, add a rule with explicit matching criteria, you can execute the "lsmod | grep xt_ "command to see the relevant kernel extension modules (Xt_multiport, Xt_iprange, Xt_mac, xt_stat

input-s 1.1.1.1/24-d 172.16.80.116-p tcp-m multiport--dports 22,80-j ACCEPTIPRange extensionIptables-a input-d 172.16.80.116-p tcp--dport 80-m iprange--src-range 172.16.80.90-172.16.80.95-j ACCEPTString extensionstring pattern matching detection for application layer data in messages--algo String Matching algorithm--string pattern of strings to be detectedIptables-a output-d 172.16.80.116-p tcp--sport 80-m string--algo BM--string "gay"-j REJECTTime e

Basic network knowledge ---------- iptables, ---------- iptablesIptablesCommands are commonly used in linux, and are part of the netfilter project. You can configure the syntax directly or through the graphical interface. Iptables (option) (parameter) Option -T Iptables Command Option input sequence: Iptables-t table

Tags: iptables filter table case, iptables NAT table applicationFirst, iptables filter table CaseRequirements: Release 80, 20, 21 ports, specify a specific IP for 22 portsHere's how to do it:vim/usr/local/sbin/iptables.sh//Add the following:#! /bin/bashipt= "/usr/sbin/iptables"//define a variable, write

(many QQ servers)Iptables? I FORWARD? P tcp -- dport 8000? J DROPIptables? I FORWARD? D tcpconn.tencent.com? J DROP 6. publish internal network servers to the public network (Port ing technology)For example, publish the WEB service of the intranet host 192.168.16.200 to the INTERNET. The INTERNET user accesses the network interface of the NAT server through TCP port 80.Iptables? T nat? I PREROUTING?

multiport--dports port list", "-M multiport--sports", check the source port of the packet, the destination port, and the multi-port with a comma interval.Examples:Allow the machine to open 25, 80, 110, 143 ports to provide e-mail services?2) IP range matchingUse the form "-m iprange--src-range IP", "-m iprange--dst-range IP" to check the source address and destination address of the packet.Examples:Disable

How to use the Iptables NAT feature to use the Red Hat Enterprise Linux as a router. Method: Tip: The following methods only apply to the Red Hat Enterprise version of Linux more than 3. 1, turn on the package forwarding function: echo "1" >/proc/sys/net/ipv4/ip_forward 2, modify the/etc/sysctl.conf file, let the packet forwarding function automatically when the system starts: # Controls IP Packet forwarding Net.ipv4.ip_forward

Iptables log search and iptables search Iptables log Exploration In addition to effectively controlling network access, the main function of the firewall is to clearly record network access and automatically generate logs for storage. Although the log format varies with the firewall manufacturer, the main information recorded is basically the same. The log Conte

IPTABLES entry, iptablesStatement: As I found that I cannot meet my comprehension ability (poor comprehension ability) after checking the online information, the summary is not systematic (not meeting my requirements), so I will summarize iptables with this, reprinting can be left with no name, but I believe that all JJ users will leave their names. Pure cainiao level, Please bypass ....Reference: laruence

From: China Linux Forum Iptables and SOCKS5From the "iptables and natcheck" article, we can see that, as long as both ends use iptables for Nat, even if both sides pass the natcheck compatibility test, iptables can never cross each other.What should we do? One way is to add a Transit server

Enable iptables firewall for CentOS and iptables for centos In fact, these things should be clearly written as soon as they are completed. They have been written for a long time. Maybe they have not been written in some places. I hope to see the kids shoes for help and I will update them again, if any error occurs, please criticize and correct it. I used iptables

Ubuntu default installation is not open any firewall.When you use service iptables status , you are prompted to iptables:unrecoginzed service. This means that the service is not recognized.The following methods are from http://blog.csdn.net/lywzgzl/article/details/39938689, but the test found that This method is no longer available in Ubuntu#在ubuntu中由于不存在/etc/init.d/use.Through the above method, finally can not solve, through the research found that

[Email protected] ~]# iptables-F[[email protected]~]# Iptables-X [[email protected]~]# iptables-a input-m State--state related,established-J ACCEPT # does not allow the server to actively establish a new connection [[email protected]~]# iptables-a input-p tcp-m multiport--sp

of INPUT-I (insert) 6: iptables-a input-m [limit/multiport/state] add the corresponding module to implement the corresponding functions.-m (model ), 7: iptables-a input-m state -- state NEW-j ACCEPT uses the state module to control data packet status matching. 8: The service iptables save rule is saved to the/etc/

Disable the iptables firewall in centos Linux (iptables in Linux)On a linux server, the firewall is an iptables component. When some software is installed, the iptables firewall will block some necessary connections. View iptables status: service

Tags: tables count Sample Enter firewall nbsp Chain LTE iptableTo view iptables rules:[[Email protected]0002~]# Iptables-Nvlchain INPUT (Policy ACCEPT0Packets0bytes) pkts bytes Target prot optinch outSource Destination1786140K ACCEPT All--* *0.0.0.0/0 0.0.0.0/0State related,established0 0ACCEPT ICMP--* *0.0.0.0/0 0.0.0.0/0 0 0ACCEPT All--Lo *0.0.0.0/0

acceptIptables-a filter-p tcp -- dport 110-s 192.168.100.200-J acceptIptables-a filter-p tcp -- dport 53-J acceptIptables-a filter-p udp -- dport 53-J acceptIptables-a filter-J Drop Multiple portsIptables-a filter-p tcp-M multiport -- destination-port 22,53, 80,110-s 192.168.20.3-J reject Continuous PortIptables-a filter-p tcp-M multiport -- source-port 22,53, 80,110-s 192.168.20.3-J reject

Iptables firewall usage notes and iptables firewall notes I. background When a WEB project goes online, you always need to install the environment. You can configure a firewall to allow Internet access. In the past, I used to search for a tutorial on the Internet. I don't need to worry about opening the port 80 command after I click it. In the spirit of learning, I plan to study the