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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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 ...
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4answers
1k 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 ...
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0answers
42 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 ...
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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 ...
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1answer
38 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 ...
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1answer
22 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 ...
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0answers
33 views

Unable to redirect the package to the internet with Openvpn Debian server and TunnelBlick for mac

I have tried many times, can anyone give me some hint? (I am sure my bind9 server works on the same openvpn server) Server Config: port 1194 proto udp dev tun ca easy-rsa-proxy/keys/ca.crt cert ...
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3answers
2k 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 ...
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0answers
4 views

Hyper-V configure with internet [migrated]

I am using Hyper-V to create some Windows server 2012 R2 virtual machines. All was good until I found I could not access the internet in the virtual machine and now I am stuck. Where I am at ...
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1answer
22 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 ...
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0answers
4 views

I am not able to connect my software with my public IP [migrated]

please help me in port forwarding. i m stuck in the middle. suppose my local ip is - 192.168.0.103 and public ip is - 49.248.xx.xxx I have D-link DSL-2520U ADSL2+ modem router so here is what i do, i ...
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1answer
17 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
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2answers
27 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 ...
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1answer
24 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 ...
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0answers
17 views

Upload speed for 100 visitors per day [duplicate]

I'm trying to setup a small business with my Asp.net web application. My initial target is, max 100 visitors per day and I can manage a 2.5 mbps internet speed which has 2.5 mbps upload speed with ...
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0answers
12 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 ...
4
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5answers
3k 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
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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 ...
252
votes
45answers
62k 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
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0answers
27 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
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3answers
96 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 ...
8
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1answer
25k 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 ...
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2answers
142 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
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0answers
10 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 ...
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1answer
20 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 ...
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2answers
6k 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
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1answer
29 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
1k 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, ...
25
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8answers
19k 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
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0answers
16 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 ...
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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, ...
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2answers
42 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 > ...
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0answers
29 views

Configure local squid for caching and redsock behind squid proxy parent

I'm using Debian, and to access to the Internet my network follow this diagram: MY PC -> SQUID PROXY (with digest authentication) --> INTERNET To resolve the digest authentication with my ...
9
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1answer
506 views

Freebsd change default Internet channel route

I have two Internet channel and Gateway on freebsd. When I switch channel with the command route change default chan2, the command netstat -nr shows changed default route. But traceroute shows that ...
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1answer
1k views

MikroTik RouterOS 5.18 Does not connect to internet after restart

I am setting up a RouterOS on an x86 machine. The router is configure and is connected to internet via PPPoE internet connection. I am distributing it to 5 PCs and a Router via RouterOS PC. The setup ...
14
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6answers
17k views

How does geography affect network latency?

I have the option of hosting our database/web server at a managed hosting company on the East Coast (US) or one on the West Coast (US). Our company is based out of New York City, and both hosting ...
1
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1answer
368 views

Conigure Linux server to do lawful interception

I have a server that makes the routing for my LAN (Linux, CentOS). I would like to have on it the possibility of lawful interception: I want to be able to see all network traffic that was done from my ...
0
votes
1answer
43 views

Extremely flaky connection to our EC2 instance through one connection, but not others

We have a robotic coffee barista deployed at the Dell campus in North Austin, with internet service through Time Warner Cable. We have been fighting intermittent connection losses between 10PM - 1AM ...
1
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1answer
328 views

“RTNETLINK answers: File exists” /etc/network/interfaces Does'nt contain 2 gateways, so what's wrong?

This is my /etc/network/interfaces file contents The only way this is taking effect is when the system reboots. I'm trying to get it effected manually. My attempts below. auto eth0 iface eth0 ...
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1answer
51 views

Restrict XP to access internet in Server 2012 R2 Domain using GPO?

How can I restrict only XP machines to access internet in Server 2012 R2 Domain environment using GPO? I need to allow those XP machines to access local Intranet sites in the Domain environment just ...
4
votes
2answers
325 views

Should Server Internet Connection be based solely on Internet Speed?

We are running our own server and our country's ISP is telling us that we should run it with their T1 Copper Line with 2mb DL & UL. Right now it is running on a Fiber Line with 8mb DL & UL. ...
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2answers
108 views

The status of the internet [closed]

What are the best services to let you know the state of every internet service provider. I recall there were companies that you could subscribe to that would let you see a graphical map of the status ...
2
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1answer
13k views

OpenVPN connected but not internet access on the client

I've setup OpenVPN following this tutorial, and everything works fine except that I don't have an internet connection on the client while connected to VPN. ...
0
votes
1answer
26 views

How can I discover the ip ranges for a particular ISP for roadwarrior vpn whitelisting?

I have a road warrior who will be based overseas for several months and will be using a particular ISP. Our VPN is white-listed. Rather than add his IP which changes every few days, is there a way of ...
2
votes
2answers
1k views

Troubleshooting High TCP Retransmit Rate

I've been attempting to troubleshoot a network issue that presents with very high rate of TCP retransmits. 36 samples (taken with Wireshark 1.10.8 running on 32-bit Windows 7) totaling a little over ...
5
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3answers
19k 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 ...
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1answer
66 views

Why would a network resolve some sites and not resolve other sites?

Win 8.1, IE 11 I recently made some changes to my internal network and suddenly attempts to access Bing are giving an error. My network is: When I connect either wired or wireless to the wireless ...
0
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1answer
40 views

No internet connection via my OpenVPN server (solved)

I have OpenVPN up and running on my server. I want all traffic from my clients to be routed trough the VPN server. The client connects just fine but is unable to connect to the internet. Server ...
0
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0answers
13 views

Connect a redhat server that is under a vpn to internet

I have to configure the environments of like 10 redhat servers(dbs, stash, test, dev, production), but those servers are under a VPN and they have no internet access, I can connect my company mac to ...
0
votes
2answers
5k views

Connect with internet in VMware Workstation

I am using VMware Workstation 7.0.0. I'm not able to set up the network connection between Host OS (Windows 7 Ultimate) and Guest OS (Windows XP Service Pack 2) to connect Host OS with the internet ...