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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14
votes
9answers
52k views

How to tell if it's your problem or your ISP's problem

I originally titled this "how to tell if your internet is down or your network is just screwed up" and Jeff's AI said that this questioned would probably be closed. Nevertheless, someone here is ...
0
votes
0answers
25 views

Ubuntu virtual machine (hosted on Windows) only connecting to google, facebook, etc [closed]

I was setting up GitLab and Gerrit servers for my company on a virtual image of Ubuntu when at some point (not sure what I did), I was unable to connect to the internet (besides google, facebook, and ...
1
vote
1answer
1k 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 ...
1
vote
1answer
2k views

PPTP VPN - No internet access though the VPN

I am very new to the world of windows server I'm renting a VM in the USA for my web hosting(DC, DNS and Web host role) and I decided that I would install a VPN on it so I could re-route me ...
0
votes
2answers
54 views

Internet is very slow because of many unknown connections from and to some amazonaws EC2 servers, Dropbox?

We are currently having issues with the internet speed at work. We asked for a global report to our ISP in order to understand what was happening, and in their report (in the "conversation report" ...
0
votes
2answers
72 views

single internet connection VS double internet connection

We have a two story building office and we are going to upgrade our internet connection. Is it better to have two separate internet connection with 15mbps each for first floor and second floor or just ...
0
votes
2answers
40 views

How does a router without QoS decide bandwidth distribution?

I've been searching for this and from what little I've found modern day routers try to balance internet bandwidth as fairly as possible. (I'm using a Asus AC66U myself) For example, if I have a 100 ...
1
vote
1answer
40 views

CentOS 7 machine lost connectivity after DDoS attack [closed]

We were testing the DDoS protection of a CentOS 7 machine but after it ended, the connection on the machine is just gone. The configuration of the connection is exactly identical to before the DDoS ...
-3
votes
2answers
102 views

How to Disable Remote desktop connection over internet on Windows server 2012?

We are using Windows server 2012. I have to disable RDP over internet. But Remote desktop should be used in Intranet.Is there any way to disable? Note: We are also using Sonicwall firewall.
-1
votes
2answers
166 views

No internet access, but DHCP gives out IP?

I'm following EliTheComputerGuy's Windows Server 2012 tutorials to setup my Windows Server and office computers with Active Directory: https://www.youtube.com/watch?v=ZfsXh_LSkgE I want to setup ...
0
votes
0answers
15 views

Double DNS Server's On Windows Server, One for Internet and One for Intranet [duplicate]

I have a windows server machine which has to access some dns names over intranet, so I have to set its DNS Servers to intranet addresses which are out of my control and only resolve names for intranet ...
0
votes
1answer
63 views

No Internet access from Server, but can access on other PC's

I've got a question about a Windows 2008 server that can't seem to access the Internet. This particular server is in Dallas and I'm in Houston, so I can't "physically" get to the server, but, ...
1
vote
6answers
837 views

Good internet map for wall poster [closed]

We are looking for cool posters of an internet map for our office walls. We are a technology consulting company so that seems like the right kind of decoration. Since this is for a company office ...
1
vote
1answer
65 views

VMWare ESXi No internet access on VMs

Created a new VM on my brand new vmware ESXi using vspehre client 5.5 and assigned an IP to the VM but no internet access. I'm pretty sure both gateway and netmask are correct. What am I missing? ...
2
votes
2answers
49 views

move DNS settings while URL stays active with forwarding

Let's say I have a main domain xxx.com and due to migration that host is going offline end of April, now what I have done is, I have registered a new domain account xxx.net and have xxx.com forwarded ...
1
vote
5answers
6k views

How to throttle your own internet connection?

I am writing a website and want to test it's speed on slower internet connections. I have the unfortunate first world problem of downloading at 100mbps, how can I throttle my own computer's internet ...
4
votes
2answers
356 views

Domain will not propagate (Over 96+ Hours)

I'm stumped. I have dozens of domains, but this is my first "ngo" domain. On tuesday (march 15th, 2016), I set the same servers for my domain "sai.ngo" to ns-1273.awsdns-31.org ns-1547.awsdns-01.co....
0
votes
2answers
110 views

Windows Limiting Internet Speed [closed]

I am currently experiencing a strange problem on my Windows Server 2012 R2. My whole network has been done with CAT6 UTP and everything (switches, adapter, etc) is able to do gigabit. My Internet ...
4
votes
3answers
2k views

How is possible that the web site is down but the traceroute is ok?

I have a web site at BlueHost ("Pro" plan) that is down often. Firefox says: The connection has timed out The server is taking too long to respond. The site could be temporarily unavailable or ...
0
votes
0answers
49 views

arpwatch to listen only to particular network

I deploy arpwatch is our network and it is working fine. But it is not doing exactly what i need. Here is what i need ... i want it to listen to one particular network ... for example on ethernet 0 it ...
0
votes
1answer
64 views

LAN access but no internet connection unless different subnet [closed]

Dear SF@StackExchange, I'm using an access point that provides LAN as well as WLAN capabilities using 4G to connect its hosts to the internet. DHCP is deactivated by design. Regardless of the OS ...
1
vote
1answer
595 views

Make local server accessible from internet in a local network within a sub-domain?

I recently tried to open a mail server for our company. For some reasons it was better to make mail server separate from other server(s) in data center, so we plugged another server to our local ...
0
votes
1answer
30 views

Cent OS - OpenVPN client connects but can't access internet

I set up openVPN 2.3 on a centOS 6.5 system I could connect with my windows client to the server. client gets IP address and DNS entries but when I like to access the internet with my client it does ...
2
votes
4answers
2k views

Is there still any legitimate reason (in 2011) to use proxy servers instead of NAT for sharing an internet connection?

Proxies were around before NAT, and so early on in the internet, they were popular ways to get an entire network online with only a single public IP. NAT initially required complex software and/or ...
1
vote
0answers
89 views

Nagios check_jstat

I'm trying to monitor java memory usage using nagios nrpe features. So I download and install check_jstat and install the plugin on the remote server. And when I ran it below is the result: OK: jstat ...
1
vote
3answers
6k views

How do I block Internet access for a user on a Windows 7 Professional machine?

I'm setting up a Windows 7 machine in our warehouse and I don't want the users to have internet access from this machine. They users still need access to the LAN to do their jobs. Does anyone know ...
-1
votes
1answer
60 views

Why when i use netstat while not connected to internet, it returns some ip addresses?

I read that this command displays network connections for the Transmission Control Protocol more info link netstat ,but when i not connected to internet and i turn off XAMMP server,it returns some ...
-1
votes
1answer
42 views

Active Directory Authentication from the Internet [duplicate]

I need some help finding a good solution to this problem. I know AD just fine, but admittedly, I'm not an expert. And I know I don't want to expose it to the internet... I inherited a workforce at my ...
20
votes
3answers
3k views

how to secure an open PostgreSQL port

So, this is the situation. It seems we need to have an open TCP port 5432 to the world, where a customer has access to his PostgreSQL database. For obvious reasons, we can't say just "no", only as a ...
0
votes
1answer
34 views

Exchange 2007 - Sending spam from MY domain but invalid, random users

I'm running Server 2003. Exchange 2007. I've got something on the system sending out tons of spam, and now mostly blocked from the outside world. (We can receive, but not send because we're on ...
-1
votes
1answer
32 views

Can we use a ADSL2+ modem in bridged mode to convert to ethernet WAN? [closed]

I am no networking master, so I have no clue if this makes sense. I have a DSL line from my internet provider with all the service details. Now, I have a TP-Link modem (+router) WD8961N. This is ...
2
votes
2answers
86 views

In windows server 2008, how do I disable recursive dns and continue to navigate the internet?

I have a single win2008 server configured to use vpn and remote desktop. My host provider demanded I remove recursive DNS. If go to dns role / group / properties / advanced and click disable ...
0
votes
1answer
29 views

Setting up OpenVPN server and client

I have been trying to better understand how OpenVPN works and so I have setup a OpenVPN server and client through VMs on my machine. I have an Ubuntu VM acting as the OpenVPN server and a Kali machine ...
1
vote
0answers
13 views

W7 Login to Secure Sites [only] are Very Slow

I hope this is the right place to post this. Have a notebook PC that customer bought with W7 Home, and they brought it to me to have it put on their network. We installed a retail Windows 7 Pro (one ...
5
votes
5answers
4k 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. ...
6
votes
1answer
1k views

Designing segmented LAN with fairly shared hi-speed internet access on a tight budget

With another member of the owners' association, I've been tasked with designing and setting up shared, hi-speed, internet access, for our apartment building. We have very little budget and hope to be ...
255
votes
45answers
64k views

What are the obstacles to providing reliable Internet access and Wi-Fi at large tech conferences? [closed]

Every tech conference I've ever been to, and I've been to a lot, has had absolutely abysmal Wi-Fi and Internet access. Sometimes it's the DHCP server running out of addresses. Sometimes the backhaul ...
0
votes
0answers
71 views

how to increase internet speed on a particular computer in a LAN network?

I am using internet in a LAN network of about 30 PC's.Every PC is connected to internet and is using considerable speed.So my questions is weather there is a way to increase internet speed or ...
5
votes
3answers
118 views

How does a router on the Internet know where to send a packet to next to get it towards its destination IP address? [closed]

I've been doing small-time freelance IT work (among other things) for about the last decade now. I've set-up or rebuilt more local network arrangements than I can care to count, and more recently I've ...
10
votes
1answer
27k views

How are cellphone IP addresses assigned?

When my cellphone accesses a website via the tower and its GPRS gateway, NAT ensures that the sites receive a public IP. Would all phones using a single tower have the same IP? If yes, then how can ...
0
votes
2answers
174 views

Cisco 2621XM Configuration with Comcast Business Modem

I have a Cisco 2620xm router that I have ran into trouble getting it to connect to a comcast modem/gateway for internet service. The router and modem used by Comcast is a DPC3... The interfaces on the ...
0
votes
0answers
18 views

Browser connection ok - CloudStation is not connecting

I'm not sure if I 'm in the right forum here...but it seems that I've to modify the network connection for a local Synology NAS client (Cloud Station) for getting it work... Since last week, I'm a ...
1
vote
1answer
26 views

How can I bring an interface down once the amount of data transferred reaches a predefined limit?

I'm using a Linux box as a router between two of its network interfaces to route local traffic to and from the internet. The internet connection in question has a defined data allowance, and exceeding ...
0
votes
2answers
8k 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 use Internet. ...
1
vote
1answer
35 views

Using our old internet connection as a failback access

We moved to another ISP recently, but we still keep our old plan too, which means we have one unused internet connection. We have netgear r8000 router on our old line, and an arris cable-modem/router ...
0
votes
1answer
2k views

Windows Server 2003 not connecting to Internet

My Windows Server 2003 has two NICs, one for LAN and the other for dedicated Internet access. Suddenly, the Internet connection stopped working. It can ping itself and the hosts on the LAN. However, ...
29
votes
8answers
24k views

Loopback to forwarded Public IP address from local network - Hairpin NAT

This is a Canonical Question about Hairpin NAT (Loopback NAT). The generic form of this question is: We have a network with clients, a server, and a NAT Router. There is port forwarding on the ...
0
votes
0answers
37 views

Grant CMD internet access, just as IE and Chrome have (via proxy)

I'm on a Windows 2012r2 machine and internet access is granted via a proxy server. The machine is installed with XAMPP and after some issues I've managed to install composer (dependency manager for ...
0
votes
0answers
1k views

Squid proxy log shows warings

I am seeing these errors in my squid logs and I wonder if it is that my configuration is incorrect. Apr 14 06:11:53 proxy squid[3901]: WARNING: Unsupported or unconfigured/inactive proxy-auth scheme, ...
1
vote
2answers
76 views

Internet Explorer 10 group policy

This question is related to Internet Explorer 9 & 10 Group Policy Preferences missing I have about 20 domain controllers and when I try edit a group policy object then go to user configuration > ...