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19 votes
3 answers
89k views

What's a loopback-address? I.e. 127.0.0.1

What is a loop-back address? 127.0.0.1 is a loop-back address, but what does this even mean? Please be very descriptive and give an example, as I'm having a hard-time understanding this.
contactmatt's user avatar
  • 1,099
5 votes
4 answers
5k views

My dyndns domain doesn't point to the right IP from inside my network, how do I correct that?

I set up a DynDns account to point a domain to my dynamic IP server at home. From any "outside" network, the connection is working and pointing to my server. But when I point my browser to my URL (...
mike23's user avatar
  • 247
2 votes
1 answer
768 views

Separate computers in my apartment can't communicate to each other?

In my apartment, the management provides the building with a network connection. I have my computer plugged into the ethernet coming out of the walls, and my friend who also lives in the apartment ...
Razor Storm's user avatar
1 vote
3 answers
8k views

Unidentified network: How to configure TCP/IPv4 for Windows 7?

When I try to connect to internet I keep getting the error Unidentified network. I've tried numerous attempts at restoring access without success. IP release, flushing DNS cache, reinstalling NIC, ...
Zolomon's user avatar
  • 171
3 votes
2 answers
146 views

Will my internet address for my internal site cause my traffic to go external?

If I have two domains pointing to the same machine, but one resolves to an internal address and the other to my internet facing router, will there be any differnce in route taken to my machine (...
Toby Allen's user avatar
  • 3,065
5 votes
2 answers
36k views

How do I find out my computer network name (Linux)?

I have a linux machine on my university network where I usually log in via ssh from home. I have know the ip, so this is what I use to log in, but it would convenient to know if my computer have a ...
Rafael S. Calsaverini's user avatar
-1 votes
1 answer
2k views

Why certain IPs redirect us to 0.0.0.0?

I have seen many times when I try to connect to default gateways through my web browser , it redirects me to 0.0.0.0 . And it shows firefox can't found 0.0.0.0 . Why this happens? If the IP 0.0.0.0 ...
narayanpatra's user avatar
0 votes
1 answer
334 views

Besides Proxy/VPN Are There Tools To Disguise Your Location via IP?

Networking wise, is there any way to hide/disguise your IP address other than using VPNs or proxies? I'm asking from an educational standpoint, is this even possible given the various networking ...
Chad's user avatar
  • 148
14 votes
4 answers
29k views

What is the maximum number of IPs that can be assigned to a given computer?

I really need to know this for a linux server, but since it also applies to client OSes, I figured the question should be posed here instead of server fault.
Jeremy Boyd's user avatar
6 votes
3 answers
947 views

Why is a network ID not needed to connect to an IP address?

I know how IP basically works, and knows that an IP address composed of a network ID portion and a host ID portion, but when I type a IP address, say 8.8.8.8 into the web browser, I didn't supply any ...
baddogai's user avatar
0 votes
2 answers
7k views

Can't access certain specific IP/domain on Windows 7

Been banging my head on the wall for some time now. I have a fresh install of Windows 7 - Ultimate ~x86. Some IPs can't resolve properly, it doesn't matter if I try using Firefox, Chrome or IE I end ...
jfrobishow's user avatar
30 votes
5 answers
32k views

Ethernet vs TCP vs IP?

What is the difference between Ethernet, TCP, and IP in simple (simple abstract) terms? Please do not copy from Wikipedia...
waka's user avatar
  • 1,247
4 votes
11 answers
108k views

How to find how many hosts are on subnet mask: 255.255.255.252?

I have Wireless Internet with a USB modem and got what seems to be a Class A IP allocated (first byte is decimal 10). ipconfig /all shows a subnet mask of 255.255.255.252. I know that the ones are ...
Jon's user avatar
  • 41
1 vote
2 answers
810 views

How to make my computer accessible anywhere

How can I make my computer accessible anywhere (via SSH preferably). I have Ubuntu installed on it. Or Is there a way to set up dyndns.com using dynamic IP without any router changes?
Devoted's user avatar
  • 905
3 votes
4 answers
12k views

How to fake ip at localhost without LoopBack

How can i fake an ip on my own PC? for example if there were an ip address lets say 201.91.81.71, that Host is somewhere outside of my red and is hosting a webserver. How can set a website on my own ...
sexer's user avatar
  • 31
6 votes
4 answers
4k views

How to block/avoid a particular IP when connecting to websites?

I'm having trouble connecting to a particular website. I can view it through a proxy, but not from home. So I ran a traceroute: Tracing route to fvringette.com [76.74.225.90] over a maximum of 30 ...
mpen's user avatar
  • 12.2k
5 votes
2 answers
11k views

Is there a way to 'include' a separate file in /etc/hosts?

Is there any way to 'include' another file within the /etc/hosts file? Particularly I want to include a non-protected (-rw-rw-rw) file so I can easily edit it in something like TextMate without having ...
lawnmowerlatte's user avatar
1 vote
1 answer
971 views

Command to find out which machines I share a network with

Can I find out which other machines (their IPs) are on my network via Ubuntu command line? What I currently do is install Wireshark and monitor the traffic. Was just hoping there was a simpler way of ...
user avatar
31 votes
9 answers
70k views

Is it possible to host a web server from behind a NAT

My PC is behind a NAT router that has a public IP address. If I want to host a website then I believe I need a domain name which I can purchase from some site which would pledge to resolve all DNS ...
Rohit Banga's user avatar
  • 2,464
3 votes
1 answer
2k views

In Ubuntu, routes are not added as defined in rc.local file....why?

I need to setup my ubuntu pc single nic card ip as 192.168.1.6 for internet and 10.172.170.95 and 135.10.86.100 for my lan and for another network through my 4port DSL modem.So i defined like this. ...
Kumar's user avatar
  • 81
5 votes
1 answer
2k views

What does "network" mean in the /etc/network/interfaces file?

In Linux, to define aliases, we have to modify /etc/network/interfaces.. Something like this: auto eth0:1 iface eth0:1 inet static address 192.168.1.60 netmask 255.255.255.0 network x.x.x.x ...
Kumar's user avatar
  • 81
6 votes
4 answers
18k views

Can I combine two Internet connections into one PC using only a switch? [duplicate]

Suppose I have two ISPs (Broadband) with two routers (DSL). Now I have one switch of say four ports. Is it possible to connect to both ISPs to one PC and combine the two to achieve faster speeds? ...
Shantanu Gupta's user avatar
0 votes
2 answers
304 views

My network is losing the ip-address

It happens often after a while und ubuntu 8.04 on my notebook in my wired LAN. After I couldn't find a reason in the logs I started a terminal and a ping. Reading my emails I recognized that the ...
Ice's user avatar
  • 669
2 votes
4 answers
6k views

Ubuntu: Fake ip address

I have a software package which is hard-coded to open a connection to a certain local IP address. Unfortunately, the local network settings have changed, And I can't access the source code (long story)...
23 votes
5 answers
177k views

How to tell what MTU is being used in Windows XP

I'm suffering from a really weird problem where I randomly get "The connection to the server was reset" errors when trying to access web pages (HTTP error 12031 according to the Windows network ...
andygeers's user avatar
  • 343
96 votes
6 answers
78k views

Why is localhost IP 127.0.0.1?

I wondered what is the origin of the decision to make localhost's IP address 127.0.0.1. What is the "meaning" of 127? what is the "meaning" of 0.0.1?
Roee Adler's user avatar
  • 1,588

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