Questions tagged [router]

A router is a device that forwards data packets across multiple networks. Questions tagged with router can cover router hardware, software, and network configuration.

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226
votes
1answer
490k views

What is port forwarding and what is it used for?

There are a lot of questions on 'port forwarding', but there doesn't seem to be one that clearly states what it is and what it's used for. So: What is port forwarding? What is it used for, and why ...
22
votes
2answers
74k views

Expanding wireless coverage: What are the differences between LAN to LAN and LAN to WAN when it comes to connecting two wireless routers?

I'm trying to link two wireless routers with an Ethernet cable in order to expand my wireless network. Both routers need to provide wired and wireless Internet access. I'd like to know the ...
37
votes
7answers
188k views

Why does just splitting an Ethernet cable not work?

I thought the Ethernet is logically a one-line communication bus (for argument's sake, I am excluding hubs). All machines attached on the bus hears the same signals and the machines themselves try to ...
79
votes
2answers
42k views

How does Router know where to forward packet

If several computers with local addresses (192.168.0.#) are connected to a router and each computer opens a web browser and requests a page over HTTP, when these TCP:80 packets are sent out, the ...
43
votes
2answers
21k views

What's the maximum actual bit rate of an 802.11g connection?

Using a wired connection, I get a 38 Mbit/s download speed. When I switch to wireless one (Linksys WRT54GL router with Tomato firmware), the speed drops to 23 Mbit/s even if the distance between the ...
0
votes
1answer
134 views

How does an internet server respond to a request from a private IP?

I'm learning about private/public IPs, port forwarding and NAT, and still fail to see the answer to a simple question: Suppose two users on the same network are communicating with a single server ...
26
votes
4answers
27k views

DD-WRT: How to allow port forwarding to apply to requests originating from inside the LAN?

With the original firmware of my router I had port forwarding defined from port 80 to the server in the LAN, which I used in conjunction with an external dynamic DNS service. I've now upgraded to DD-...
9
votes
2answers
66k views

Setting up wifi router as a switch for Internet Connection Sharing

Can my laptop with a 3G connection share its Internet via a Wifi router (Dlink DIR-615)? If so, what should I set on my laptop, on my router or on the devices connecting to the router?
21
votes
2answers
41k views

Windows 10: Phones appearing in Network

Yesterday, Network listing on Windows 10 file explorer showed me one external phone. Thus, I changed my router WiFi password just in case. Nevertheless, I checked this today and I found 5 new phones ...
2
votes
1answer
591 views

Sluggish smart-home wireless devices

I have a question. I have been experiencing delays when controlling my smart-home devices when everyone is home and using the internet. The internet is not slow, (300Mbps) but I think the one router ...
23
votes
7answers
13k views

How to extend Wi-Fi signal across rooms?

I moved into a new place and my old Wi-Fi router just doesn't have the range to get into all the rooms. I've been investigating a lot of options and I'm wondering what other folks have done here. ...
30
votes
13answers
368k views

Windows 10 Wi-Fi issue: “Can't connect to this network”

A little background - I have a Lenovo G50 which was running Windows 8.1 up until a few months back. Then came along the free upgrade to Windows 10. Microsoft updated the laptop OS to Windows&...
14
votes
3answers
51k views

How can I speed up data transfer between local computers on a WiFi network?

I have a router with ADSL Pentagram Cerberus 6331-42. Is it normal to have transfer speeds between two computers of max 1MB/s (not 1 Mbit)? How can I set my router up to make it faster at transferring ...
7
votes
4answers
1k views

What's the best way to increase the range of my 802.11g router?

I have cable broadband, and as such the router has to be attached to a cable modem which also has to connect to the TV. That means the router is stuck in the corner of my house. This is good when I'm ...
6
votes
1answer
21k views

Multiple access points / Switching issues

I've got 2 wifi access points at both ends of my flat. So I got wifi in the whole flat. One of those access points is a router (TP-Link WR1043 v2) while the other one is just an access point (TP-Link ...
158
votes
9answers
25k views

Is it really possible for most enthusiasts to crack people's Wi-Fi networks?

Can most enthusiastic users (even if they are not professionals) use well-known techniques to break through the average home router's security? Some basic security options are: strong network ...
45
votes
2answers
14k views

Why would the Wi-Fi connection on my smartphone perform better than the same connection on my laptop?

The download speeds while connected on Wi-Fi to the same router—an ADSL2+ Wireless N300 Modem Router—seems to be significantly faster on my phone than on my laptop. This problem doesn’t occur all the ...
4
votes
1answer
9k views

Accessing a website via the webservers public IP from a PC within the same LAN

If two machines reside on the same LAN (a PC and a Webserver) why is it necessary to enable ‘NAT loopback’ on the router in order for the PC to access the website hosted on the webserver using the ...
10
votes
4answers
4k views

Can I use more than one internet provider at the same time? [duplicate]

Usually a home router has only one uplink connection, enabling a single internet provider at a time. But suppose I hack my router (ie. installing linux), could I use 2 internet providers then?
8
votes
7answers
33k views

How can I make my home PC a web server?

I am running Apache Tomcat on my PC. My PC is connected to a router in my house and the router is connected to my ISP. Now I want to run a server on my PC so that my friend can view my site hosted on ...
7
votes
3answers
42k views

Which Wifi Channel should I use? [closed]

Very confused. I'm using inSSiDer, WiFi Overview 360 and Wifi Analyzer apps to try to determine the best wifi channel to use. Assuming all channels are in use and there are about 20 different users ...
7
votes
4answers
40k views

Wifi is slower than Ethernet cable connection?

I configured my new router and noticed that WiFi connection is way slower than Ethernet connection. Ethernet connection giving a download speed of ~60Mbps and upload speed of ~30Mbps while the Wifi ...
5
votes
4answers
69k views

How can I bridge a Verizon mobile hotspot modem/router to a Linksys router?

I recently purchased a Verizon mobile hotspot (MiFi 4510L) and was wondering if I could configure my Linksys wireless/wired router (similar, but not the exact model: Linksys router) to use the MiFi as ...
4
votes
2answers
5k views

Convert a router to a switch?

I have a couple of modem/routers that came with ISP services that are no longer being used. At the moment I have the current ISP's router running the wireless network and a wired portion to a couple ...
1
vote
2answers
16k views

What can I do about “ping flooding”?

Recently I have started getting period of poor connections on my home LAN. So, today after my connection was unresponsive for a while once again, I decided to take a look at what was the problem. The ...
0
votes
3answers
41k views

Can I use a ethernet splitter to connect a router to two devices? [duplicate]

I have a portable mini wireless router with different functions (AP/Client/Router). Can I use a ethernet splitter to give internet access to two devices? The router only has a ethernet port and ...
10
votes
4answers
8k views

If a computer is connected to internet via wireless and lan both, which way Internet traffic would flow?

How does this actually work? How different ip addresses on ethernet adapter and wireless adapter are handled for internet data? I know these ip are translated in NAT table but the whole process ...
4
votes
9answers
14k views

Connecting a ADSL router to a wireless router. What am I doing wrong?

What is the correct way to do it? This are the steps I have taken: Disable DHCP in Wireless router Setup a fixed IP (192.168.1.2) and telling that the default Gateway is 192.168.1.1 (the ADSL router) ...
2
votes
1answer
944 views

Bizarre and very specific Internet connection loss

Yesterday (Friday, September 21, 2012), my Internet connection started acting up. After some testing, I confirmed a very specific and baffling set of symptoms: Internet connection goes away every 25-...
28
votes
2answers
51k views

Why do some WiFi routers block multicast packets going from wired to wireless?

I have worked with dozens of consumer grade WiFi routers, and they have been really hit-or-miss with this, though it seems to be getting better. Example of issue: A device that can be discovered ...
14
votes
6answers
114k views

Can I chain two routers together keeping DHCP on both?

I have read that I can connect a second router by turning off DHCP and NAT, but I want the second router to assign DNS (I'm using it as an access point for my kids, and will use OpenDNS family service ...
74
votes
4answers
137k views

What does “On-link” mean on the result of “route print” command?

I'm using Windows 7. When I type "route print" under command prompt, I get a IPv4 Route Table with several "On-link" values under the Gateway column. For example, like this one: IPv4 Route Table =====...
6
votes
1answer
10k views

Routing a particular subnet into a VPN tunnel

My network looks like this: I'm trying configure my router so that the subnet (192.168.2.0/24) is routed over the VPN tunnel (tun0) on the gateway/router. While at the same time clients on the ...
13
votes
2answers
40k views

How can I setup a win 7 PC as a router?

I have an industrial PC with 4 Ethernet port, I would like to use this PC as a router on windows 7. Before we used Ubuntu so there is an open source solutiosn, but unfortunately the UPS power supply ...
9
votes
2answers
3k views

How can I configure my wireless network for the strongest security?

There seem to be many security features in wireless routers from MAC address filtering to the authentication type and data encryption. WPA or WPA2 PSK? AES or TKIP? When I set up a new wireless ...
23
votes
7answers
172k views

How to disable internet access at night on the router?

I have an internet connection that I'd like to be enabled only during the day. With multiple household internet devices, this would need to be something disabled at the level of the router. I don't ...
25
votes
6answers
35k views

Why do most routers not include local DNS?

I need to change my firewall/router, and I'd prefer something with built-in DNS to resolve queries on the local subnets. I've got a mixed Linux/Windows system, often with only one computer turned on, ...
24
votes
6answers
25k views

Difference between wifi router and access point?

I see both terms used, and I was wondering what the difference is between a wifi router, and a wifi access point. Does the latter only create a LAN, with no way to connect the wifi box with a second ...
12
votes
4answers
82k views

How can I capture packets going from my router to a specific server?

I have a small local network in my house that has two computers connected to a modem-router. I want to capture the packets going from the router to a specific server (I know the IP address of the ...
8
votes
4answers
6k views

What is a router? What is a switch? and What is a hub?

I always mess up with the basic concepts in networking. This are the very basic questions. What is a router, its functions and what is meant by routing? What is a switch, its functions? Many time I ...
3
votes
1answer
2k views

Using Remote Desktop to connect to different computers behind same IP

I'm trying to connect my computer from home to two computers in my office. The office has a router and I already forward the port for computer A. I can successfully connect to my computer A at my home ...
13
votes
2answers
9k views

Will using a 10/100 router stunt gigabit switch speeds for an internal network?

I have a 10/100 Verizon router. 3 computers are connected to this via Ethernet. I'd like to put a gigabit switch between the computers and router to enable gigabit speeds on the intranet. If the ...
12
votes
6answers
177k views

How to reset a Fritz!Box DSL router to factory settings?

I need to change the setting of router Fritz Box. The setting were set by another person. I can't connect to router using cable, may be standard port or address were changed. So the only option is to ...
8
votes
1answer
11k views

How to connect a wifi router to a cable modem router?

Here's the thing: I have a cable modem router (Thomson TCW710) with wifi-g that I rent from my cable company. I would like to use a wireless-n router (D-Link DIR-655, that I received for free) with it ...
6
votes
3answers
14k views

how to debug epicly slow wifi but fast lan

How can I debug a problem where my wifi is REALLY slow(it takes a minute for this page to load...even my router's admin page - 192.168.0.1)? I've tried upgrading my hardware firmware(using a DIR-600 ...
5
votes
1answer
16k views

What information can my ISP see from my router?

I installed a new router today and saw my IP address change because the new router has a different MAC address and I am just curious on what information my ISP can see from my network. I know they ...
3
votes
3answers
3k views

How can I unite two LAN connections on one network?

The small flat in which I live is designed for two students. I manage to pay the entirety of the rent myself, so I'm living by myself, but I have 2 LAN outlets in the flat. I wish to configure a local ...
2
votes
5answers
9k views

Optimizing wireless router speed and minimizing interference

I've been experiencing problems with my wireless connectivity lately, and want to make sure that it's not related to the abundance of other wireless routers here in my building. So, what I'm looking ...
2
votes
1answer
4k views

Block ARP requests (or broadcast message, if possible) from A SPECIFIC HOST in a subnet

My ISP provide username-password for authentication and also register the client's MAC address for authentication. I am concerned about someone misusing my connection while I am not using it. ...
2
votes
4answers
25k views

How do I filter out addresses using HTTPS for a D-Link router?

I recently got a new router, a DRL-600L Router from D-Link, and was setting up some filters to block out certain websites. One problem I am having is blocking out addresses that use https instead of ...

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