Port 8080 on linux

how to check port 8080 is open in linux?

If you need to check if port 8080 is open on a Linux machine, you can use the netstat command. This will show you all of the active network connections and their associated ports. To filter the output to just port 8080, you can use the grep command.

How do I check if port 8080 is available Linux?

How do I check if a port is open in Linux?

Assuming you would like to check if a specific port is open on a Linux machine, there are several ways to do this. The most common way is to use the netstat command. Netstat shows network connections, routing tables, interface statistics, masquerade connections, and multicast memberships. To use netstat to check if a port is open, use the -an argument. This will show all active TCP and UDP connections and their respective ports. If the port you are checking is listed as closed or not listening, then it is likely that the port is not open. Another way to check if a port is open on a Linux machine is to use the nmap tool. Nmap (“Network Mapper”) is an open source tool for network exploration, management, and security auditing. To use nmap to check if a port is open, use the -p argument followed by the number of the port you wish to check. For example: “nmap -p 80” will scan for any hosts with port 80 open. If you need more help checking if a port is open on Linux, feel free to reach out to our support team at [email protected]

How do I open port 8080 on Linux?

Assuming you are using a common Linux distribution such as Ubuntu or Debian, you can use the iptables command to open port 8080. For example: sudo iptables -A INPUT -p tcp –dport 8080 -j ACCEPT This will add a rule to your firewall allowing traffic on port 8080. You may also need to enable port forwarding in your router’s configuration if you want external traffic to be able to reach your web server.

What port is 8080 for?

8080 is a port for web applications. It can be used for various purposes, such as running a web server, hosting a website, or accessing a remote desktop.

How do I know if port 8080 is open on remote host?

If you want to check if a remote host has port 8080 open, you can use the nmap tool. To do this, simply run the following command: nmap -p 8080 If port 8080 is open on the remote host, you should see something like this: PORT STATE SERVICE
8080/tcp open http-proxy

How do I see all ports in Linux?

To view all ports in Linux, you can use the netstat command. This will show you a list of all active network connections and their associated port numbers. You can also use the lsof command to view a list of all open files and their associated port numbers.

How do I check if port is open?

If you want to check if a port is open on a remote machine, you can use the telnet command. For example, if you want to check if port 80 is open on google.com, you would run the following command: telnet google.com 80 If the port is open, you will see a blank screen. If the port is closed, you will see an error message saying «Could not open connection to the host, on port 80: Connect failed«.

How do I run port 8080?

If you want to run port 8080, you will need to use a tool like netstat or lsof to check if the port is already in use. If it is, you will need to find the process that is using it and kill it. Once the port is free, you can start your own process on it.

Can I use port 8080 for HTTP?

Port 8080 is commonly used as a proxy port. It is also sometimes used as a general purpose alternative to port 80. However, it is not recommended to use port 8080 for HTTP because it can conflict with other applications that use this port.

What is a localhost 8080?

A localhost is a web server that is running on your computer. Port 8080 is the default port for web servers.

How do I check if a port is open on a Linux remote?

First, you will need to determine which port you want to check. Then, you can use the telnet command to check if the port is open on the remote Linux machine. For example, if you want to check if port 80 is open, you would run the following command: telnet 80 If the port is open, you will see a connection message. If the port is closed, you will see a connection error message.

How do I open a port in Linux?

There are a few different ways to open ports in Linux. One way is to use the iptables command. For example, to open port 80, you would use the following command: iptables -A INPUT -p tcp –dport 80 -j ACCEPT Another way to open a port is to use the firewall-cmd command. For example, to open port 80, you would use the following command: firewall-cmd –zone=public –add-port=80/tcp –permanent

How do I see what ports are running?

The first step is to identify which ports are running on your system. This can be accomplished by using the netstat command. The netstat command displays active connections and their status, as well as a variety of network and routing tables. To see what ports are running, open a terminal window and type: netstat -a This will show all active connections and their associated port numbers.

How do I find port number in Linux?

There are a few ways to find the port number in Linux. One way is to use the netstat command. To do this, open a terminal and type «netstat -tulpn«. This will list all of the active ports on your system. Another way is to use the lsof command. To do this, open a terminal and type «lsof -i :80» (replace 80 with the port number you’re interested in).

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ubuntu open port 8080

This port is a popular alternative to port 80 for offering web services. «8080» was chosen since it is «two 80’s», and also because it is above the restricted well known service port range (ports 1-1023, see below).

How can I tell if port 8080 is open?

1. Hold down the Windows key and press the R key to open the Run dialog.
2. Type “cmd” and click OK in the Run dialog.
3. Verify the Command Prompt opens.
4. Type “netstat -a -n -o | find «8080»». A list of processes using port 8080 are displayed.

How do I check if port 443 is open?

You can test whether the port is open by attempting to open an HTTPS connection to the computer using its domain name or IP address. To do this, you type https://www.example.com in your web browser’s URL bar, using the actual domain name of the server, or https://192.0.2.1, using the server’s actual numeric IP address.

How do I stop port 8080?

How do I know if a port is open?

Enter «telnet + IP address or hostname + port number» (e.g., telnet www.example.com 1723 or telnet 10.17. xxx. xxx 5000) to run the telnet command in Command Prompt and test the TCP port status. If the port is open, only a cursor will show.

How do I open my ports?

To open a port (or set of ports) in your Windows firewall, you will want to open your control panel and go to your Windows Firewall settings tab inside your Security tab. Choose Advanced Settings. You will see the firewall window shows a list of rules in the left side.

How do I permanently open a port in Linux?

1. Log in to the server console.
2. Execute the following command, replacing the PORT placeholder with the number of the port to be opened: Debian: sudo ufw allow PORT. CentOS: sudo firewall-cmd —zone=public —permanent —add-port=PORT/tcp sudo firewall-cmd —reload.

Does Ubuntu 18.04 have a firewall?

UFW ( Uncomplicated Firewall ) firewall is a default firewall on Ubuntu 18.04 Bionic Beaver Linux.

How do I open port 80 on Linux?

How do I open port 80 (Apache Web Server) under Red Hat / CentOS / Fedora Linux? [/donotprint]The default configuration file for iptables based firewall on RHEL / CentOS / Fedora Linux is /etc/sysconfig/iptables for IPv4 based firewall. For IPv6 based firewall you need to edit /etc/sysconfig/ip6tables file.

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How to open a 8080 port for an application, with iptables

I am a total newbie concerning servers so excuse my humble question 🙂 Someone developed for me a python application that acts as a web serveur. This TCP application needs to listen to port 8080.

[root@blabla jll]# netstat -tanpu | grep ":8080" tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 18209/python 

It seems that 8080 is not opened on my server firewall. To open it, I tried to modify iptables rules like this :

/sbin/iptables -A RH-Firewall-1-INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT 

However I still have nothing at http://my.server.name:8080. (I am not even sure about «RH-Firewall-1-INPUT» or «INPUT») What can I do now ? Is there some kind of general procedure for such things ? I give you the following usefull info :

/sbin/iptables -nvL Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 49 3388 ACCEPT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:8080 25M 3736M RH-Firewall-1-INPUT all -- * * 0.0.0.0/0 0.0.0.0/0 Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain OUTPUT (policy ACCEPT 43M packets, 41G bytes) pkts bytes target prot opt in out source destination Chain RH-Firewall-1-INPUT (1 references) pkts bytes target prot opt in out source destination 121K 15M ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 97773 8078K ACCEPT icmp -- * * 0.0.0.0/0 0.0.0.0/0 icmp type 255 0 0 ACCEPT esp -- * * 0.0.0.0/0 0.0.0.0/0 0 0 ACCEPT ah -- * * 0.0.0.0/0 0.0.0.0/0 17 2509 ACCEPT udp -- * * 0.0.0.0/0 224.0.0.251 udp dpt:5353 0 0 ACCEPT udp -- * * 0.0.0.0/0 0.0.0.0/0 udp dpt:631 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:631 24M 3682M ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 26069 1319K ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 3806 204K ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:443 563K 30M REJECT all -- * * 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited 

 /sbin/iptables -nvL -t nat Chain PREROUTING (policy ACCEPT 168K packets, 15M bytes) pkts bytes target prot opt in out source destination Chain POSTROUTING (policy ACCEPT 4200K packets, 252M bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 4200K packets, 252M bytes) pkts bytes target prot opt in out source destination 

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open port 8080 for listening

How can I open 8080 port for listening? In normal situation, I have tomcat7 that listens on port 8080.

 sudo netstat -tanpu | grep ":8080" tcp6 0 0 . 8080 . * LISTEN 7519/java 

After that, I stop tomcat7 with sudo service tomcat7 stop . So, now 8080 port is closed. I did sudo iptables -A INPUT -p tcp —dport 8080 -j ACCEPT to open it, but the port is not listening.

sudo netstat -tanpu | grep ":8080" tcp6 0 0 127.0.0.1:8080 127.0.0.1:37064 TIME_WAIT - 

3 Answers 3

You are confusing two concepts. Iptables handles access control for your networking. When you accept input traffic with a destination of TCP port 8008 that you just means you are letting the internet send traffic to that port. It has no effect on what, if anything, is listening on the port.

To listen on a port you need a program set up to do that. In your original case, tomcat was that program. You stopped it so now nothing is listening on that port. To open it back up as a listener you need to start tomcat , or any other program that you want, to listen on that port. What program you select to listen on that port is entirely dependent on what service you want to provide on that port.

The iptables commands don’t affect whether or not your program is listening, it just affects whether or not traffic from the internet is allowed to talk to that program.

If you just want to open up a network port that dumps whatever is sent to it, the program you want is netcat . The command

This will cause netcat to listen on port 8080 and dump whatever is sent to that port to standard output. You can redirect its output to a file if you want to save the data sent to that port. If you want anything more sophisticated than a raw data dump, you will need to determine what specific program(s) are capable of handling your data and start one of those instead.

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