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, ...

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1answer
674 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
507 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
580 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
568 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
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1answer
279 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
165 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
746 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
150 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 ...
3
votes
1answer
7k 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 ...
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votes
2answers
614 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
64 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
87 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
125 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 ...
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votes
1answer
200 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
92 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
312 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
1k 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., ...
1
vote
1answer
462 views

VLAN connectivity issue and Tagging

I'm playing around with splitting up my existing flat LAN into a couple of separate VLANs. I seem to have everything working and routing as I want but I am having issues with internet connectivity. ...
1
vote
1answer
167 views

Setting up VPN on win2k3

Recently moved local server to a datacenter. It is used for small file storage, database and thats about it. I am trying to setup VPN there, which I have never done. I tried setting it up while ...
4
votes
7answers
649 views

multiple internet connection at office

We have been using two separate Internet connections in our office. People will share internet connection by setting their gateways to either of these. Gateway is one of our local server through ...
1
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2answers
216 views

Intel Server Board: Ethernet MT connection vs PM connection

What's the difference between an MT ethernet connection and a PM ethernet connection? Intel server board has two ethernet ports that are named in that manner.
2
votes
2answers
159 views

Windows Server 2008 DNS Issues with Internet Sites

We are having trouble with DNS. I recently switched internet providers and the problem followed us, at which point I realized our 2008 R2 Domain Controller's DDNS must be the problem. I switch to ...
0
votes
2answers
419 views

Carrier ethernet vs Metro ethernet or any other alternative?

We have three remote offices (office A, B, and C), two (Office B and C) of them need to access the Linux file server and web application server in Office C. We also need to administer the network of ...
1
vote
1answer
267 views

how to access my lan based postgresql db from my website

We have lan based .Net application with Postgresql 8.1 , now i have task to provide interface on website to read and write two tables on LAN based database I don't know where to start Please help me ...
2
votes
2answers
221 views

Restricting RDP sessions over Internet but not LAN

Fair warning: I'm a programmer, not an IT person. Thus I have no idea what I'm talking about and put myself entirely at your mercy. I have three dedicated machines that we currently administer ...
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votes
2answers
178 views

Why isn't the root domain also a name server?

I was trying to understand the inner workings of DNS. To clarify things, when I say the root domain I mean the root domain without a name. So when I type http://www.example.info, it will check the ...
0
votes
2answers
98 views

Acces NMS present in intranet through internet

I am having NMS application(OpenNMS) running in my intranet network at 172.16.3.32.I have developed an android application which call the webservices running on the NMS machine.I have successfully ...
10
votes
3answers
791 views

No internet after dhcp lease renews

Today we had a number of machines stop getting internet access. After a lot of troubleshooting, the common thread is that they all had their dhcp lease renewed today (we're on 8 day leases here). ...
0
votes
2answers
86 views

Procedure for Setup of Internal Cache Server

I currently have a small business where many of the computers download the same fies over and over again (for example Windows Updates). What I'd like to do is setup a cache server, something that'll ...
1
vote
3answers
503 views

Internet access control without squid

I intend to configure a server as a gateway. I'll use it to manage network users, as well as share the internet connection for this network. I will not share the Internet with squid, but I still ...
3
votes
3answers
180 views

How can a domain name have no nameservers?

I have found several domains on the internet that have no nameservers, however they have WHOIS records and domain registrars say they are taken. My understanding of DNS on the internet was that the ...
3
votes
3answers
232 views

Monitoring Internet latency

I've been using smokeping to monitor internet latency (for early problem detection) at 8.8.8.8 for several months. On Friday the average latency went from 12ms to 55ms and has been at the 55ms plateau ...
1
vote
2answers
134 views

Restrict internet access?

How do I restrict users so that, they can only go to certain websites? What devices do I need? And how to configure the settings? Please guide me. (I was thinking using firewall, set the ip ...
1
vote
1answer
469 views

How does a Web Proxy work?

Consider a case that there is a Proxy in my Organization, I need to enter the Proxy details in my IE. If I remove these details from the browser, I am no longer able to access the Internet. So I ...
2
votes
1answer
100 views

Mac OS X and Windows clients loses DNS from time to time using a PPTP Linux server

I have a PPTD server (pptpd) running on Debian and my clients are either Windows or Mac OS X machines. I also have an internal DNS hosted at the PPTP server since I want to resolve internal ...
2
votes
1answer
77 views

Questions and opinions of a Cable line with a back-up T1

My company currently has only a Covad T1 that connects the main office to the internet. This line is mainly for our billing office (located across the state) to connect to us for our Terminal Server. ...
1
vote
2answers
156 views

Can Microsoft Exchange 2010 Server Standard be place directly on the Internet? [closed]

I have a 2008 Windows 64 bit server on the Internet. Can I install Exchange 2010 Standard on that server? Is there any reason you can't put the Exchange server right on the Internet like that?
11
votes
11answers
21k views

Will a higher bandwidth Internet connection lower ping response time?

It sounds obvious that a faster connection lowers latency... But I wonder: I am working remotely on a host the other side of the world - light can only travel so fast (1 foot in a nano second) and we ...
2
votes
2answers
1k views

Using RRAS to bridge two networks

I have the following setup: Server A has two NIC's - one connected to each switch. Server B just has a NIC connected to the internal switch. Server A and Server B can both ping each other. But ...
1
vote
1answer
2k views

ICS without the default DHCP server

Using windows 7, Is it possible to turn on Internet Connection Sharing but rather than using the built in dhcp provided by windows, I want to use my own app to handle that. Is there a way to turn off ...
1
vote
1answer
258 views

Can't connect to server, others can

I've set up a Webserver(port 80) and a Minecraft server. Me and my friends play on this server regularly and haven't had any problems connecting before this. Now, one friend complains about not being ...
1
vote
3answers
186 views

Percentage of computers on Internet behind a NAT?

I'm in a process of developing a server application and I would like to know if there are some numbers (or experience from people) on how many computers are behind the NAT on the Internet? Since my ...
1
vote
4answers
2k views

How to set up daisy-chained routers for separate sub-nets?

This question seems to be similar to others, but I'll take a shot anyway. A client recently switched ISPs from TDS to Comcast Business Class. Before the switch, they had 5 static IP addresses ...
3
votes
1answer
2k views

internet connection in debian 6's recovery mode

I've broken my window manager on my Debian 6 machine, and so I am stuck to recovery mode for now. That is, I got a plain root shell. Now here's my problem: how can I get a internet connection, so I ...
0
votes
1answer
90 views

Hosted (external firewalled) ASP.Net application to customer LDAP

Situation: I manage a hosted ASP.Net application that employs winform authentication. The application has role based security, and access control list to various assets. Multiple customer use the same ...
3
votes
3answers
3k views

SSL Certificates: Multiple Single Domain vs Wildcard?

I'm my company we want to deploy SSL certificates to some websites we own, and our RADIUS server as well (Cisco ACS). What is the practical difference from acquiring 5-10 single host certificates or ...
1
vote
1answer
278 views

Is it possible to separate Routing/NAT in conjunction with an internal DNSMasq host providing DNS/DHCP?

It's really great letting DNSMasq take care of DHCP / DNS, as it "just knows" everything... as it should, considering it dished out the addresses to the hosts... However, it seems (to me) - ...
1
vote
1answer
327 views

Break through TCP/IP port exhaution (on Windows)

I'm searching for a setup where one Windows with one ethernet card is able to handle more then 65k open IPv4 TCP connections -- yes, it's not possible per default by the specification. I've found a ...
0
votes
3answers
220 views

Preventing local network access on wireless network

On our current network, we have a wireless router and a gigabit 16-port switch. If a machine connects to the wireless network, they have access to all of the local machines in the network. This can be ...