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Questions tagged [port]

A port provides a location for an application to interface with the network. If there is no application that is listening at a particular point, data sent there will never be used.

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is there a way to port forward two routers?

i have two routers Router 1 connected to the network and Router 2 connects Ethernet to Router 1 and also Ethernet to me Router 1 is DHCP and router 2 is also DHCP (Linksys) so i watched a video on ...
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Can't Port forwarding with Cisco 1921

I have a cisco 1921 router that I can not get to port forward/allow access to my internal webserver. SSH is open so it appears that the ISP or modem isn't blocking it (I could be wrong). Inside LAN ...
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Openvpn and port blocking

I use openvpn on my desktop and all traffic goes through it. I blocked ports 443 and 80 FORWARD on the router. No processes are using ports 443 or 80 on my pc. Because ports 80 and 443 are blocked ...
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How to Automatically Add Port to URL

When I type in a url, usually I want port 80 or 443, but oftentimes, if I am typing in something that is locally hosted, I want a different port. Is there anyway, in your hosts file or something, to ...
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How can I see if my serial ports are rs232/485?

I need to have a PC with a RS 232 port and a 485 port, currently the PC already has 2 serials but I don't know if they will work?
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Properly block ports on openwrt

I want to block certain protocols to be used, and I do this by blocking their ports such as 53. I tried to edit /etc/config/firewall adding: config rule 'stopdns' option name 'stopdns' ...
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Why windows listening to port 3000? [duplicate]

by using netstat -n -o -a i see that process id 4 listening to that port. TCP 0.0.0.0:3000 0.0.0.0:0 LISTENING 4 By using task manager i found that process id 4 is NT ...
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I am trying to allow inbound connections on port 8333 but even though the settings are open, it doesn't work

even though my router (netgear900) says it is open (and pointed at the IP of my device that wants to use 8333), it does not work. The router says the port is open but my device is not allowing any ...
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Is there an alternative to `ssh -R` that's self-contained — establishing an incoming socket via an outgoing connection?

Is there a self-contained alternative to ssh -R [bind_address:]port:host:hostport functionality? Basically, I have a machine that doesn't have a public IP address. I need to be able to SSH into said ...
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30 views

How to block the culprit of the unknown port?

When I did a port scan nmap -p- localhost of my local system I found some unknown ports opened. I was using a closed source application when this happened and I known its this causing port opening. ...
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26 views

Odd outgoing smtp issue during certain times of day

Ok, so this has me stumped. I have also spoken with our ISP (comcast) and mail provider (GoDaddy), both are not only no help, but also stumped. Problem is only with outgoing email, incoming continues ...
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39 views

Connecting to a service on a host behind NAT from another host behind NAT over the Internet

Assume you have a host (hosta) that is running a TCP service (e.g. a VNC server on port 5901). You want to access to this service from another host (hostb) running a VNC client. Both hosts are ...
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42 views

Why does my router have an HTTP server on port 5555?

I just did a port scan using nmap on my router (a Netgear WNDR3700) from the LAN side and found these ports to be open: PORT STATE SERVICE 23/tcp open telnet 53/tcp open domain 80/tcp ...
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1answer
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Laravel page running with no servers it looks like

I have been having major issues, kind of like this: cannot create a project in Laravel , with Laravel after installing XAMPP (was able to kind of normally operate it at beginner-level with just a ...
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114 views

How could I connect to a remote router located far, far away, with an intention to browse the internet by using his current public IP address

Scenario: Let's say my friend lives 10km away With his permission I'd like to use his internet connection 24/7 as if I'm there, and browse the internet by using his public IP address, just like you ...

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