The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (often called TCP/IP, although not all protocols use TCP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, ...

learn more… | top users | synonyms

0
votes
1answer
216 views

ping OK, nslookup OK, wget locally OK, remote HTTP false

I'm trying to access http://domain.com/test.html from internet, but getting error Server is running CentOS I'm using DSN hosting (yandex.ru) for domain.com Ping server by ip = OK Ping server by ...
2
votes
0answers
43 views

How normal are remote connection faults and what do they mean? [closed]

Quick background: I have been having a lot of connection issues with my home network. I finally got my ISP to understand and after them checking some of the problems outside of my home I've gone from ...
1
vote
4answers
173 views

Mounting a file system over the internet

I built a web application that runs on a virtual server for one of my customers. It includes the facility for them to upload files, but they now want to store those files on a server in their office. ...
5
votes
2answers
973 views

What's so special about leased lines (T1, DS3, etc)

I understand the theory of having "dedicated bandwidth" but why would a small/medium business purchase a leased line for access to the internet? In today's day and age residential grade connections ...
1
vote
1answer
57 views

Tool for creating networks configuration on real machines or VM ? simulating internet networking [closed]

I'm looking for a tool that can simulate and create networks with different machines , kind of intranet , tool for creating networks configuration on real or VM ? Thanks
-2
votes
3answers
164 views

How to become an ISP [closed]

well cutting to the point... I want to be able to provide internet to rural areas of my country so they can too gain acces to internet for free. I was wondering what I need to start small, like ...
1
vote
1answer
71 views

Rsync through the internet

I'm looking for a way to copy files from production server to DRP server via internet. The two servers are in different states. For now, there isn't a lot of data to transfer but I suspect it might go ...
-2
votes
2answers
125 views

Bandwidth and Speed monitoring software [closed]

I am looking to get some advice on what you guys think would be a good fit for my requirements. My goal is to find software which would monitor internet speed (UP/DOWN), ping times and more(possibly) ...
4
votes
2answers
316 views

How do I diagnose network corruption on an Internet path?

I run a few hosts on network A that make requests to servers (which I don't own) on network B, somewhere across the Internet. Unfortunately, many of these requests get corrupted. If I make the ...
1
vote
0answers
267 views

Getting Squid to download files using multiple internet connections [closed]

I have 2 internet connections into the house, one 120Mb/s and one 60Mb/s. They will be eventually connected to a RouterBox router (A 750G to be exact) and the bandwidth loadbalanced between them ...
9
votes
2answers
267 views

DNSChanger Malware / Rogue DNS - “Internet Doomsday” July 9

Back in late 2011 the FBI dismantled a large and sophisticated internet fraud ring behind the DNSChanger virus/malware. Part of this malware involved directing victim's DNS requests to rogue servers ...
6
votes
7answers
736 views

Troubleshooting Website problems within the local network

Have an external website which opens fine on some PC's, yet seems to time out (or symptoms of timing out, but never actually does) on others. Seems to only affect (some) of our newer HP Pro 3305 MT ...
0
votes
1answer
402 views

One Windows Domain workstation can ping gateway but gets no internet access

One of the (Windows XP SP3) workstations of our Windows Domain could not access internet anymore, this problem suddenly happened overnight. The domain controllers (there are three of them) are all ...
0
votes
2answers
283 views

PCs with Wired Connection Keep Losing Internet Connectivity

I have a U-verse ATT DSL Internet at our church building. Recently, any computer that is plugged into the network via Ethernet keeps losing its internet connectivity. The setup is from the Modem to a ...
1
vote
2answers
227 views

How can I use a backup internet circuit for incoming services/applications?

Current: Primary ISP - fiber Backup ISP - DSL We have various apps/services like VPN, email, etc. that come in on various external IPs on the primary ISP. Is there a way without BGP peering to ...
1
vote
1answer
69 views

Internet Sharing solution

I have a client that is a business. The people at this business are not in anyway computer savvy. I was asked to make a file server for them. This server will need to have four shares with a ...
2
votes
2answers
55 views

Can I use address space from one Internet Registry in the region of another?

Is it possible for me to, for example, purchase address space from APNIC and then use those addresses in Europe or the United States? Would there be a cost or paperwork involved? Thank you.
4
votes
2answers
157 views

Fiber vs. 2 separate business-class cable

We're completing renovation of our new office and need to make a decision on internet access. Our office will contain ~20 employees at the start and we may grow to ~40 in a few years. We have VOIP ...
1
vote
4answers
164 views

Acceptable use policy / computer use policy / network use policy - why are they needed?

I've always posted a(n) acceptable/computer/network use policy for employees using a network/computer or from users coming in from the outside to use public access points or public computers. Private ...
3
votes
2answers
209 views

Is it just me or is my node down?

I find the www.doj.me very useful. I am looking for something like that but specifically for BGP Nodes. I want to write a script that tells the users if our Internet backbone is down, if if yes which ...
-1
votes
1answer
279 views

Server can't connect to the internet

I have a headless file server running debian that just stopped connecting to the internet. Console output: Dmesg: [ 84.248344] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 85.941389] svc: ...
8
votes
1answer
6k views

What exactly is the MTU/MRU issue, what it is caused by and how to fix it?

In cases of hanging, freezing, slow, unresponsive internet connections the cause is usually unreasonably identified as "MTU/MRU issue" with several hastily proposed "magic cures" (usually invalid or ...
1
vote
2answers
108 views

Root DNS Servers

I understand the root DNS servers (A to M). What I don't exactly get it is the difference between, let's say the "F Root DNS" and the "A Root DNS". Why is there 49 total "F" DNS's and only "A" DNS's? ...
0
votes
2answers
549 views

Use number of downloaded file in wget as variable in bash script

Can I get the number of downloaded files with wget -r and use that as a variable? I want to write a script that runs multiple wget commands in it (using -q so i can control output) and then at the ...
1
vote
3answers
5k views

How can I find out which server OS a particular site is running?

Is there a way to check which server OS a particular site is running. For example from linux command line. Maybe via telnet? But all I can get from "telnet www.google.com http" is: Trying ...
0
votes
2answers
1k views

Internet traffic when connected to a SonicWALL VPN

We have a new VPN to let all users connect to the company's applications through it (inside the company net). We have a lot of users using the SonicWALL Client and we want to allow them using ...
4
votes
1answer
2k views

New Fiber Optic Internet Connection, want to use Sonicwall TZ200 as main router, WAN/VLAN

Key Facts: We have a new internet connection with Movistar. It is a 100/10 Mbit line. We want to use the TZ200 as our main router. The Fiber Optic router is a ONT I240 The internet router that ...
0
votes
1answer
126 views

Bridging DSL wifi router to a PacketCable modem [closed]

I used to use a DSL based Internet connection (an AirLive WT-2000ARM). Recently I changed my Internet connection and it is now provided through PacketCable. The provider gave a modem for it (Thomson ...
4
votes
2answers
432 views

How to find the lowest latency midpoint between two geographic locations?

I'm looking for a geographic location (not service) to host internet services that will give me the lowest latency on connections from two other locations. How would I best determine the most ideal ...
-1
votes
1answer
159 views

not reachable from within my own network through outside facing interface

Is there any quick answer that lapses me by to this situation - my server is accssible at 192.168.2.200:5222 without a problem (from within the local network of course) but if I try to reach it ...
0
votes
2answers
583 views

Computer running Win7 won't access websites but can ping them

First off, pardon me if this is not where I should ask IT questions. If there is another StackExchange site (or site in general) that I should go to by all means let me know. The Problem: One of our ...
0
votes
1answer
453 views

Is it possible to access Alfresco CIFS through Internet?

I know it's a security issue, but just by curiosity (I can't find a proper answer to that!), is it possible? I defined cifs.broadcast=255.255.255.255 in the Alfresco configuration, but whatever I ...
0
votes
1answer
548 views

How to connect to hyperv guest machine by rdp through internet?

I installed hyperv and some client machines. Now i need to connect to any of client machine and host by using rdp through internet. This instruction tell me what i need to configure port forwarding on ...
2
votes
4answers
2k views

Downloads pause and time out frequently

I'm a new systems and network admin. My experience has been in the hardware and software of systems and servers, the network part is pretty new to me. I'm familiar with plugging numbers into network ...
5
votes
3answers
448 views

Tools for Remote Control of Linux over internet [closed]

I am looking for some tools which can give remote control of a Linux machine over Internet. As of now I know of TeamViewer, but it looks like too expensive when used commercially. I being part of a ...
2
votes
3answers
489 views

On CentOS 4.5, How to Masquerade a connection using MAC address?

Currently we give Internet access using ip address in our firewall script as follows iptables -t nat -A POSTROUNTING -s 192.168.1.40 -j MASQUERADE But we have noticed that some guys steal these ...
1
vote
1answer
419 views

netstat -e: high discards and errors

I think my network is congested because of the relatively large discards and errors data. They should be zero or at least close to that. Here is the output of netstat -e on my computer: Interface ...
0
votes
1answer
258 views

What is the difference between a leased line and EFM?

I am ordering a new internet connection in the United Kingdom and wondered what's the difference between: 10mb leased line 10mb EFM (Ethernet First Mile) line They both seem to offer equal ...
0
votes
1answer
153 views

If linux server is connected to router, internet connection for the whole network will not work

I have a machine (Fedora) which is using iptables (acting as firewall). The system worked a long time, but now there is a problem. The internet connection was failing. I looked through and found out ...
0
votes
1answer
613 views

How do I access a web server on a VirtualBox from the internet? [closed]

Scheme: Direct Internet connection with static IP (upd: connected directly to the ISP without any routers). Win Web Server (Win 2008 R2). VirtualBox with guest OS Linux Debian. Web-server on Debian. ...
0
votes
1answer
137 views

Determining Internet Backbones from ASN

I am new to this layer of networking so I apologize if this question is a bit strange. When running a traceroute, I get the up addresses of the route it takes. Now, I take these addresses and map ...
2
votes
1answer
5k views

Who (What?!) is “http://1.1.1.1/bmi”? [closed]

I'm not sure if this is the place to ask but I found some pages who contain links in them that start with "http://1.1.1.1/bmi". Who or what is 1.1.1.1? or maybe http://1.1.1.1/bmi has a meaning more ...
0
votes
2answers
481 views

Trying to host my own domain, using BIND and CentOS 6. Please check my named.conf and zone for errors

delegated the namesever/ip records around 24 hours on the registars website but things aren't working. NAT: forwarding all UDP/TCP requests to internal server IP on port 53 (ISP not blocking) and ...
1
vote
2answers
62 views

Trying to grasp the logic behind a complete DNS resolution and respective sequence of actions

Say we have a domain "example.org" and it has an authoritative name server with name "ns1.example.org" with a glued IP as delegated by domain registrars (delegative?) name servers. Someone types ...
0
votes
1answer
82 views

Can someone explain to me exactly why it's bad to use NS name that is a subdomain for the domain that NS is for

Reading a book and it states that you should not register nameserver names such as ns1.example.com for the domain example.com as you'll create a catch-22 situation when looking up ns1.example.com etc. ...
2
votes
1answer
120 views

Load balancing multiple internet connections

I've got the following scenario: - one low speed and low latency DSL connection (cable) (250kb/s 25ms) - one high speed and high latency DSl connection (satellite) (1250kb/s ~1500ms) Is there a ...
-6
votes
1answer
177 views

Server is not reachable because it was setup as Static IP. Must requires DHCP mode [closed]

ISP provides Static IP. Based on MAC address, so that forever the end user have Static IP (to do mail/www servers) Step 1: So as a user we purchased this module called Static IP using MAC address ...
0
votes
1answer
81 views

Internet Backup if DSL & Cable Fail [closed]

We have a T1, a DSL Line and a cable modem in each building to assure that we can connect to the internet in case one fails. However during the latest power outage we also lost all of them and were ...
1
vote
2answers
274 views

Two network adapters with the same ip

I have two network adapters that use the same ip range, but are different networks. I tried this but it didn't work: iptables -t nat -A OUTPUT -p all -d 1.2.3.0/8 -j DNAT --to-destination ...
0
votes
1answer
822 views

Linux-Based, Open-Source, Speed-Test Module

I am setting up diagnostic servers on local networks (Redhat 5.5). One requirement is a speed test where users in the network can test the speed of their internet connection (e.g., ...