Questions tagged [ports]

In computer networking a port is a software construct serving as a communications endpoint in a computer's host OS.

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Security implications of forwarding ports 1-10000 on Airport Express?

Today I found that ports 1-10000 were being forwarded on an Airport Express that I as well as a fair number of other people share. This was setup by another user. There are multiple machines and ...
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1answer
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how is my router being modified to include WAN port-binding items for Teredo and Spotify [closed]

My router's configuration app (browser-interface) has a page for Virtual Server. It has entries I did not create, at least not intentionally using the interface, for Teredo, Skype, Spotify, uTorrent. ...
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3k views

Telnet local privilege escalation exploits possible even when telnet is running under a normal user account?

http://www.exploit-db.com/exploits/8055/ says: The telnet protocol allows to pass environment variables inside the telnet traffic and assign them to the other side of the tcp connection. The ...
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52 views

Open Ports at ISPs Gateway

I am working to set up OpenVPN access to my home network. To do this, I had to contact my ISP, because they had the necessary port blocked at the Gateway/Router that I do not have access to. In my ...
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1answer
870 views

My router is getting port scan attacks [duplicate]

My internet suddenly cut out yesterday, i checked the router and it looked like nothing is wrong. I looked at the logs and i see this 2019-08-18 12:50:39 Security Warning Detect UDP port scan ...
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100 views

nmap gives different results in two shells on the same computer

I'm running kali and metasploitable2 in Virtualbox, and have them connected via the host-only networking mode. I can ping and ssh from kali to metasploitable, and have assigned the following IP ...
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2answers
637 views

Does having Frontend and Backend on the same port any consequences?

I am currently working on a mean application, with an Angular frontend and an express/node backend. Frontend and backend communicate together with a REST API. When I deploy the application, both the ...
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1answer
344 views

How to ensure if an SSH tunnling failed (if I haven't really tunneled)

I tunneled data transition as 22-22 and 2222-80, between my PC and VPS: ssh user@1.1.1.1 -L 22:localhost:22 -L 2222:localhost:80 -i ~/.ssh/key To make sure both tunnels were created, I executed lsof ...
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2answers
526 views

Windows 10: telnet - Openwall GNU/*/Linux telnetd running on an open port normal?

I noticed my internet connection was acting a little strange (stuttering up abruptly seemingly randomly), so I thought I'd see what's using it using Zenmap. I ran "Intense scan" using the latest ...
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43 views

Firewall issues

Background I have an Android device (Minix M5) that I handed to a customer The device only does outbound connections, so no inbound traffic The customer confirmed that s/he opened up the ports ...
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1answer
995 views

Why is Parallels Plesk running on port 8443 > 1023?

Parallels Plesk, a server administration software package, uses HTTP(S) on port 8443 (ref). I know that ports <1024 are only available for root. This means that if the server Plesk is using for ...
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1answer
1k views

Are these port secured on my AP?

I'm doing a project for my high-school and I'm trying to get the best security for my network. I've made almost everything in my access-point configuration and I have only 3 tcp/ports open on my AP: ...
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1answer
727 views

How to turn of telnet and FTP on Thomson 789vn router? [closed]

I have run a port scan against a Thomson 789vn router and have noticed to my surprise that its HTTP as well as telnet and FTP ports are open. How can one turn off telnet (also FTP) using the router's ...
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1answer
51 views

Finding how many filtered ports of a host that would be listed as “filtered” on Nmap

I just started working on nmap and was confused by this question. I'm unsure if I understood it correctly, so I appreciate your help with this. Using Nmap, find how many ports are filtered in testphp....
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2answers
182 views

How to perform a security test/review/penetration testing of Ethernet ports?

I have been engaged by a client who wants its Ethernet ports checked to determine whether port security is functioning effectively. What can be the approach or steps to do check Ethernet port ...
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1answer
582 views

TCP Scans vs SYN Scans in port scanning

What is the difference between TCP Scans and SYN Scans?
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1answer
42 views

How to connect to external address as other outgoing port number without proxy [closed]

Is it possible to (mask / define) outgoing port locally on network without using a proxy? default (outgoing protocol) [address] [port] set to (outgoing protocol) [address] [selected port] There ...
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1answer
639 views

Get Services On Open Port

Is it possible to get a list of services running on an open port? E.g. I am connected to port 80 with netcat and I want to get services that are listening.
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2answers
116 views

Determining Firewall settings (Ports, etc) for specific applications

How can we identify the network or network firewall requirements for a Desktop or Web application. Meaning what ports are required by the applications. How the Cloud and non Cloud networks communicate ...
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2answers
844 views

How to limit source port for accessing blocked website?

My country has a firewall which blocks sites like Facebook, whatsApp etc. However, they use some kind of port blocking, so some important websites for me like Chegg is also getting blocked I think due ...
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2answers
655 views

Keyloggers and Email Accounts [duplicate]

This morning, I was experimenting with some keyloggers and noticed that they have a feature to send e-mails to the attacker. How can these e-mails be intercepted? Let us say that I have a packet ...
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1answer
90 views

Port knocking is authentication?

In computer networking, port knocking is a method of externally opening ports on a firewall by generating a connection attempt on a set of prespecified closed ports. Once a correct sequence of ...
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1answer
214 views

What ports can make me get RCE on the devices? [closed]

I know that remote code execution depends on the service running on the open port. For example I know that SSH, FTP may be vulnerable to RCE if they are running an unpatched version. So what about ...
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1answer
566 views

Unable to open port on Windows 7 [closed]

The scenario is as follows: while a PC was connected to our company's network, a specific application was able to open another process on a predefined port. It worked as expected. But now, this PC ...
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1answer
4k views

How to find IP Addresses that have been attacking my Computer Ports ? [closed]

I am a newbie at Info Sec, and wanted to know which IP addresses are sources of attack traffic. Can I also find out which ports are being attacked? Can this information be found in windows firewall? ...
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1answer
162 views

How to find out which application runs behind port 31337?

I found an open port on a "Kartina Quattro" (https://www.kartina.tv/article/247-kartina-quattro). It's a device for watching russian TV channels. The port number is 31337 and the Service is called ...
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2answers
6k views

Kali Linux/Metasploit in VirtualBox - Issue with ports

I've been attempting to get port 4444 to open these past couple of days. I finally figured I'd try to get it working on my Windows machine first and I finally got it. Now, no matter what I do in the ...
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1answer
115 views

Strange behavior of Nmap

I do port scanning with Nmap when HotSpot Shield VPN is running; and I am receiving strange result - when HotSpot Shield is running, Nmap tells me that all of the ports are open and when HotSpot is ...
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3answers
1k views

What are ports? [closed]

I just wanted to know what are ports. Can someone explain to me what a port is?
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2answers
9k views

Port list according to vulnerability [closed]

I'm looking for a list of ports sorted according to the number of vulnerability you can find for that specific port (considering of course, the service installed in the default port). Example: ...
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2answers
2k views

Insecure/Obsolete TCP/UDP Ports? [closed]

I used CurrPorts to monitor TCP/IP network connections. This image shows when I don't connect to the Internet but I don't know why Avast Antivirus established this port. Is it insecure? This image ...
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1answer
71 views

Little bit confusing with nmap scan

I started MySQL with this command service mysql start and it worked pretty well. So: Using the netstat command, I found 127.0.0.1:3306 was in listening state, this is the MySQL service. So I did a ...
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1answer
183 views

How am I affected by malware? Malware transferred from service provider's base station or just port scan? [closed]

I need a malware expert here. I am being targeted by advanced hackers over the 4.5 years. So this is my situation: 1) My new phone: I just bought a new phone, with SIM card and mobile internet plan ...
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2answers
956 views

Why is it a bad idea to allow all inbound / outbound traffic?

I have an AWS server. I didn't want to spend too much time configuring the Security Group and allowed all inbound and all outbound traffic. Is this OK or is it a bad idea?
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2answers
111 views

How to Defend Against Port Scan Attacks

I was told that Hackers scan for open ports in random IPs and if they are open they hack the computer. What open ports can be hacked? How do I close the ports?
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1answer
6k views

DoSing my Home Network with only a Public IP address [closed]

+--------------------------------------------------------+ | Client Host Name |.. IP Address ..|.... MAC Address ...| | Desktop-Home ....| 192.168.1.100 | 00:19:D1:EA:03:68 | | GT-S5380K .........
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1answer
2k views

How to use beef-xss on ports other than default 3000?

I want to use BeEF-XSS Framework over WAN (for educational purposes). The only problem is that my ISP is blocking port 3000. So, after some research, I found this page that says: However, beef-xss ...
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2answers
5k views

What's the risk of opening ports 1-65535? [closed]

Just going to say this right now; this seems absolutely ludicrous. I've had a problem with playing Super Smash Bros. on Wii U ("Cannot connect to partner's device."; also happens for all Internet-...
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1answer
221 views

Benefit of checking TCP port or UDP port [closed]

I'm studying port scanning. How can an attacker benefit from the information of checking TCP ports or UDP ports?