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All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Hottest Questions. Previously Viewed. Unanswered Questions. Computer Networking. Computer Network Security. Wiki User No, physically they are different numbers.

Computer ports and their functions ppt

Logically, however, both port 80 and port listen for HTTP traffic, so logically they are the same. Port 80 is the standard, production port for HTTP traffic. Port is a 'test' port for HTTP traffic.

Port is a common alternative to port Port is also frequently used for proxy servers which are servers that fetch and cache content for the client computers that are configured to use that server. It's the same as on a computer the port is Asked in Internet What is the port number for browsing? General HTTP requests are transmitted and received on port Secure data is transmitted on port Asked in Internet Which port needs to be open to access the internet?

If you have opened the right ports and still can't access the internet call your ISP. If that does not help switch ISPS. IVC Telecom, or Teksavvy. Port is an alternative to the port 80 used by http and web services. UNIX enforces the notion of the first "privileged ports" which can only be opened by services running with so-called "root", or administrative, privileges.

Historically, this meant that only authorized system administrators were able to establish and operate a web server on port 80 since this was within the first port privileged region. Therefore, when non-administrators wished to run their own web servers on machines which might already have a server running on port 80, or when they were not authorized to run services below portport was often chosen as a convenient place to host a secondary or alternate web server. You need to be a system administrator to do that.

You may configure everything at your house and have you web server running on port Then you will have to use a service to forward your port back to If your website is not on port 80, people will not be able to access it unless if they know what port it is being hosted on.

All web browsers connect to port 80 automatically unless it is specified to connect to another port.Quickly change Tomcat port to the one you need. Change Apache Tomcat port to 80 or another port number. But there can be situations where there are some other servers running on this same port forcing you to change the port of one of the servers. This article explains how to change this port on Tomcat we tested this against Apache Tomcat 5.

In our systems, tomcat is installed in the following path. Labels: Software Tomcat. Newer Post Older Post Home. We appreciate your opinions, suggestions and criticism. Read More While trying to install Nginx server using the source di With Java, putting contents of an Array into a new List object or adding into an existing List object can be achieved easily using a for Web Services with Apache Axis 1. Web services are a handy method of integrating independent systems.

Apache Axis is one of the best free tools available for implementing a Java Sorting: Comparator vs Comparable Tutorial. Java Comparators and Comparables? What are they? How do we use them? This is a question we received from one of our readers. This article With default configurations, JBoss listens on port for web connections. But this can be changed easily as this port is defined in an In this tutorial we will implement a full data encryption decryption cycle with Java only data, not file encryption ; encrypt some data us Are your Jenkins builds failing due to unavoidable reasons like unavailability of external databases, file systems etc?

The only solution yo Test cases for Binary search might not be something you have already written, but the implementation must be an old exercise you may have do Firefox: Dramatic change in release version patterns.

port 80 vs 8080

History of Firefox starts inwhen a new flavor of Mozilla was released under the name Phoenix.My friend told me i have to close those ports so i can vote for his server.

I know how to open the port settings, but i don't know which one to delete. I have a feeling your friend is messing with you. If you close off those ports your next question on here from a different pc or location will be why did I loose the ability to surf the web???

If you really want to close them off you will need to access your firewall and block the ports. Which is just a pandora's box Cause there are a lot of firewalls out there. Both software and hardware. In terms of "ports" port 80, is normal http web traffic, is often used a http web traffic then the server is inside a firewall, and does not allow passing TCP ports below You will NOT find this available in a management screen.

If you were to block port 80, you would lose the ability to connect to the majority of web servers. The prefix is solely there to determine protocol. Answer Save. Favorite Answer. Those ports are for Internet communication.

port 80 vs 8080

BurrintheSaddle Lv 6. Port is the https secure socket TCP port.

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My recommendation, Don't vote for him. It is a waste of time, and can trash connectivity. How do you think about the answers? You can sign in to vote the answer. Lora Lv 4. Still have questions? Get your answers by asking now.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I had recently installed Tomcat 7 on Amazon ec2. I found that Tomcat, by default, listens on port The documentation on the internet advocates that this is because linux is better saving the lower ports to the super user. The solution on ec2 btw is creating a Load Balancer - directing the communications from port 80 to port on the target machine. Than - to my surprise - I went on and installed an Apache server on another machine yum install httpdand surprise!

The difference is mostly historical at this point, but still enforced by Linux and most Unix implementations that I can think of. Any user should be able to bind to ports higher than If your software package is of a certain vintage it expects to be started as root, bound to a port, and optionally it will then change effective UID to a non-privileged user.

Software packages created later on ie Apache Tomcat typically went the route of doing everything with a non-privileged user and binding to a higher port number by default. I continue the explanation. All other threads or workers run a non-privileged user mostly apache. Tomcat can use the same principiple. Tomcat is whole written in Java, so there is just one user that is used to run the whole JVM.

It is usually user 'tomcat'. Run the tomcat under 'root' change it in tomcat. However it it not recommended because of security reasons. It means you also run Apache HTTPD server on port 80 and forward traffic to the tomcat port default is http onhttps onajp on Learn more.

Apache httpd vs. Tomcat 7: port 80 vs. Asked 6 years, 9 months ago. Active 4 years, 4 months ago. Viewed 11k times. The solution on ec2 btw is creating a Load Balancer - directing the communications from port 80 to port on the target machine Than - to my surprise - I went on and installed an Apache server on another machine yum install httpdand surprise!During these challenging times, we guarantee we will work tirelessly to support you.

We will continue to give you accurate and timely information throughout the crisis, and we will deliver on our mission — to help everyone in the world learn how to do anything — no matter what. Thank you to our community and to all of our readers who are working to aid others in this time of crisis, and to all of those who are making personal sacrifices for the good of their communities. We will get through this together. Updated: September 24, Tech Tested. Opening port 80 can resolve connection issues for older websites, but it also increases the risk of someone accessing your network without permission.

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check if port is open

Tips and Warnings. Related Articles. Find your router's IP address.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Super User is a question and answer site for computer enthusiasts and power users. It only takes a minute to sign up. I am running a small website using nginx. Since there's probably not going to be a lot of traffic in my server's lifespan and to avoid random DoS attacks, I am considering setting the web server to listen on an alternate port instead of port Does listening on an alternate port 81,etc.

Or does the burden of maintaining it outweigh the benefits? In that case, should I be using those alternate ports for other web services in case I set them up in the future? Methods like changing ports is called " Security through obscurity " and it is highly questionable that the extra work and inconvenience provides any valuable security.

Yes, setting an alternate port actually reduce the risks of attacks, as the bots crawling the web to find flawed webapp usually doesn't look at other ports.

port 80 vs 8080

If a human attacker is aiming your server, it will be really easy to discover the real port on which nginx is listening on by scanning open ports. Using theses alternate ports is rare except proxies or An additional consideration to the two provided by Keltari is that using a non-standard port may result in your website being overlooked by search engine web crawlers like Google's, unless you specify otherwise.

If it is your intention that your website be difficult to find for everyone except the people you provide a link to, then using a non-standard port would seem to be favourable, but otherwise I'd go with a standard port. If it's going to be used by other people, I would highly recommend using standard ports.

As mentioned in most of the answers, using a nonstandard port requires that the port is specified by the user e. If you use a standard port, the browser infers the port from the protocol http, https.

I highly recommend using standard ports. Sure, you CAN put the only entrance to a house in the backyard, but how will visitors know it's there? You can run http server on any portbut it will be difficult for your surfersusers to remember the port. It will reduce the risk of attacks or breaches, but there are other ways too, like securing your server and keep HTTP server on port Sign up to join this community.

The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Should I run my small website in port 80,or 81? Ask Question.

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Asked 6 years, 1 month ago. Active 4 years, 10 months ago. Viewed 91k times. Why some 'attackers' will takes risks to D DoS a small website? Active Oldest Votes.

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There are two things to consider here: Will your users remember to use a non-standard port in the name? By default, port 80 is the standard and therefore you do not have to type it into the URL.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. As asked by Joel here is the ports. The usual reason why apache is often configured to listen on that port is that a process need to be run under the root account or to be granted specific privileges to be able to listen on TCP ports lower than and that includes of course port Using an higher, unprivileged port number allows to run apache under a regular account without any specific configuration.

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Home Questions Tags Users Unanswered. Why is Apache running on port instead on port 80? Ask Question. Asked 5 years, 11 months ago. Active 3 years, 11 months ago. Viewed 43k times.

I am confused why Apache is not responding on port HTTP request sent, awaiting response What's the value of the Listen directive in the config file? JoelDavis Strange. How comes? I cannot remember that I configured the port manually this is a freshly installed Ubuntu machine. Please convert your comment to an answer if this is the final solution. Active Oldest Votes. JJD 2 2 gold badges 9 9 silver badges 25 25 bronze badges. Bratchley Bratchley Is there any point within the installation of Apache2 where the user can decide which account is used to run the service?

It's supposed to always start as root and then drop down to the account specified by the User directive on its own. Tomcat has this limitation having to run as root or a non port because it's an application server as so such things aren't its primary focus. JoelDavis Your are right is the default Tomcat port and packaged apache2 are designed to start as root. However, should a non root user want to install apache from source or should apache2 be installed and started as non root for some other reason, the point is still valid.

Apache doesn't demand to be run as root. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. The Overflow How many jobs can be done at home? Featured on Meta.


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