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The --destination-port match option is synonymous with --dport. To specify a range of port numbers, separate the two numbers with a colon (:), such as -p tcp --dport 3000:3200. The largest acceptable valid range is 0:65535. Use an exclamation point character (!

The --source-port match is used to match packets based on their source port. Without it, we imply all source ports. This match can either take a service name or ...

13.04.2009 · The Linux iptables comes with MATCH EXTENSIONS which can use extended packet matching modules. The multiport match module matches a set of source or destination ports. Up to 15 ports can be specified. A port range (port:port) counts as two ports. It can only be used in conjunction with -p tcp or -p udp options. ADVERTISEMENT Syntax

The --destination-port match option is synonymous with --dport. --sport — Specifies the source port of the UDP packet, using the service name, port number, or ...

Oct 28, 2008 · Assuming you know which machine you are sending to: iptables -t nat -A OUTPUT -p udp --dport 162 -j DNAT --to-destination <dest-ip>:1620. Share. Improve this answer. Follow this answer to receive notifications. answered Oct 28, 2008 at 12:35.

Jan 01, 2019 · Match--dport, --destination-port: Example: iptables -A INPUT -p udp --dport 53: Explanation: The same goes for this match as for --source-port above. It is exactly the same as for the equivalent TCP match, but here it applies to UDP packets. It matches packets based on their UDP destination port. The match handles port ranges, single ports and ...

Matches any packet whose destination port is any of the given values. As with --source-ports , the list of ports is a comma-separated list of single port ...

IPTables Match Options. Different network protocols provide specialized matching options which can be configured to match a particular packet using that protocol. However, the protocol must first be specified in the iptables command. ... The --destination-port match option is …

Sep 18, 2006 · And destination port range specification with following option : –destination-port port:port –dport port:port; For example block lock all incoming ssh access at port 22, for source port range 513:65535: iptables -A INPUT -p tcp -s 0/0 --sport 513:65535 -d 195.55.55.78 --dport 22 -m state --state NEW,ESTABLISHED -j DROP

17.06.2011 · But I need to specify much more port numbers in a single rule, so I tried to use several multiport in one rule like: iptables -A INPUT -p tcp -m multiport --destination-ports 59100 -m multiport --destination-ports 3000 -m state --state NEW -j REJECT --reject-with tcp-reset. The result of iptables -L INPUT -n is.

--dport — Specifies the destination port of the UDP packet, using the service name, port number, or range of port numbers. The --destination-port match option ...

The reason for this is that in the case of fragmented packets, there is no way to tell the source or destination ports of the fragments, nor ICMP types, among ...

This module matches a set of source or destination ports. Up to 15 ports can be specified. A port range (port:port) counts as two ports. It can only be used in ...

--dport — Sets the destination port for the packet. To configure this option, use a network service name (such as www or smtp); a port number; or a range of ...

Iptables is used to set up, maintain, and inspect the tables of IP packet filter rules in the Linux kernel. Several different tables may be defined. Each table contains a number of built-in chains and may also contain user-defined chains. Each chain is …

It's a flag for one of it's extended packet matching modules. ... --destination-port,--dport port[:port] Destination port or port range ...

--ctproto TCP matches all protocols but the TCP protocol. ... Example, iptables -A INPUT -p tcp -m multiport --destination-port 22,53,80,110.

The --destination-port match option is synonymous with --dport. --sport — Specifies the source port of the UDP packet, using the service name, port number, or range of port numbers. The --source-port match option is synonymous with --sport .

11.08.2015 · Iptables is a software firewall for Linux distributions. This cheat sheet-style guide provides a quick reference to iptables commands that will create firewall rules that are useful in common, everyday scenarios. This includes iptables examples of allowing and blocking various services by port, network interface, and source IP address.

18.09.2006 · –destination-port port:port –dport port:port; For example block lock all incoming ssh access at port 22, for source port range 513:65535: iptables -A INPUT -p tcp -s 0/0 --sport 513:65535 -d 195.55.55.78 --dport 22 -m state --state NEW,ESTABLISHED -j DROP. On the other hand, just allow incoming ssh request with following port range:

01.01.2019 · There are currently three types of implicit matches for three different protocols. These are TCP matches, UDP matches and ICMP matches. The TCP based matches contain a set of unique criteria that are available only for TCP packets. UDP based matches contain another set of criteria that are available only for UDP packets.