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
28 views

DirectAccess Setup on a Home ISP [closed]

I have a home office and I would like to setup DirectAccess from WS2012R2 for the client so their laptops are always able to VPN and connect home to access files and more. From the ISP side I've ...
-2
votes
1answer
103 views

How configure 2 Lan cards in Windows 7/8 pc one to connect to Internet and other to Local Network [closed]

    I am about to install a dedicated VOIP server in our office. It is a 3CX pbx system on Windows 7/8 machine. The environment currently is a Windows SBS 2011 with 8 client machines. I want ...
1
vote
1answer
26 views

Restict Internet Connection Except using Proxy

Given (as-is) A router with DHCP enabled An Active Directory Server Two Windows 7 clients joined the domain Planning (to-be) A proxy server Two clients are set to restrict internet connection ...
0
votes
1answer
61 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 ...
2
votes
1answer
99 views

Production servers can suddenly not access the internet anymore

Problem All Production Servers were suddenly not able to access the internet anymore, while four other Servers connected to the same VLAN and same eth0 settings can. Figure 1: System 1 represents ...
26
votes
3answers
2k views

Is it safe to reboot a server open to the internet?

Specifically I have an iptables ruleset defined on a server running CentOS. Am I guaranteed / can I guarantee / how can I guarantee that when networking comes online (either at machine boot, or after ...
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votes
2answers
49 views

What is this router's IP address(es)? [closed]

What is the IP address(es) of the router in my picture? In my picture, you can see that I have question marks next to the router's interfaces, because I'm not sure if those are right. Can someone ...
0
votes
2answers
60 views

Do orgs that own IP blocks even use all (or most) of it? [closed]

I recently learned that the IANA assigns blocks of IP addresses to certain entities, usually commercial and government organizations. Here is a link to the assignments: ...
1
vote
2answers
67 views

How can I change metric of public network in route table

In my windows 8.1 ENT [64 bit] machine I have 3 network adapters. Ethernet 1 is connected to public network and other 2 ethernet adaptors are connected to different internal networks. The problem is ...
2
votes
1answer
576 views

How to Configure Source NAT (Private IP => Public IP Outbound)

I'm running VMWare ESXi Free and have Zentyal SBS 3.2 running as a Gateway. I have 5 Public IPS (CIDR/29, let's call them 69.1.1.1 - 69.1.1.5) and currently Zentyal is bound to 69.1.1.1 as the ...
-2
votes
1answer
59 views

DNS hierarchy with bind [closed]

I'm doing a project from class in which I want to simulate a dns hierarchy that works as the global internet dns hierarchy. The structure is like this: Hierarchy So all the requests will be sent to ...
4
votes
1answer
156 views

Delay from Google URLs & Services

At work, we've had a persistent issue with slow response times from Google based URLs via our Comcast internet service. Any time we try to load Google.com, YouTube.com, Drive.Google.com, ...
0
votes
2answers
88 views

Make ESXi VM use client network

Is it possible to make the ESXi VM to use the network that from where the remote console to the VM (in question) is initiated? For eg. I have a VM "VM1" on an ESXi. I am initiating the remote ...
1
vote
0answers
115 views

VPS without access to the Internet after reboot

There is a problem with my VPS. I had purged lots of programs using apt-get command and * wildcard among other things to remove many apps at the same time such as sendmail-*. After it the server ...
-4
votes
2answers
99 views

How can I optimize my ajax calls to deliver at 60ms.

I am building an autocomplete functionality for my site and the Google instant results are my benchmark. When I look at Google, the 50-60 ms response time baffle me. They look insane. In ...
-4
votes
1answer
848 views

Does adding ?.jpg after url really bypasses wifi security? And how? [closed]

So I stumbled upon the following lifehack the other day: I currently don't have access to an airport with expensive WiFi but it seems that adding ?.jpg to any url doesn't cause any problems with ...
2
votes
1answer
50 views

Prevent creation of default shortcuts and Favorites in Windows XP SP3?

(1) Whenever a new user is created on a Windows XP SP3 system running Internet Explorer 8, their Favorites folder is automatically populated with a "Microsoft websites" folder and several links in the ...
1
vote
0answers
38 views

Exchange have disconnection Issue while using behind TMG 2010

We have two branch office but not VPN (Data Circuit) between them. We are using Exchange facility from another branch but we are having disconnection / slow issue as already set TMG alerts. Outlook ...
1
vote
1answer
3k 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. ...
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votes
3answers
271 views

How to check if internet IP address is currently taken? [closed]

Usually I check with ping {ip.address} and that kind of confirms someone has the ip, but when when I ping my Amazon server the message is Request timed out. However I know it's there and I can ...
0
votes
0answers
550 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, ...
2
votes
1answer
50 views

Web server with access to internet and internet Active Directory [closed]

This might sound like a stupid and unsecure question, but we're front-end web delopers and don't know that much about these things. So here goes.. We're creating a web app where we want to log in ...
1
vote
1answer
45 views

Deploying Ruby Applications In Air Gap (No Internet Access) Network

The current network setup at my job has made it difficult to deploy Ruby web applications. We are running our production RHEL servers in an air gap network with no access to the public internet. My ...
0
votes
1answer
260 views

Node.js forwarding from local network to public Internet

I have a Server running node.js in my network that is not reachable via the internet (i.e., no static IP / domain). However, I have a vServer with a domain that is running node.js as well. Can I ...
0
votes
0answers
91 views

Connection is not persistent when using EVDO data card

I use a BSNL EVDO wireless data card. So, with this I cannot get my connection persistent i.e I cannot load Facebook, Gmail or Google search properly. If I enter a word and hit enter in Google search ...
0
votes
0answers
124 views

Connecting internet uplink to switch or firewall

While I am using Cisco kit, this isn't really Cisco related, more general network design. In the past I have connected internet connections straight in to a layer 3 core switch, 3750X's, 6509's and ...
-1
votes
1answer
36 views

Router connect same 2 ports? [closed]

What it will happen if 'accidentally' i will connect 2 ports with the same utp cable? I'm asking here since i don't find anyware such a stupid and silly question but i'm curios about it, the router ...
0
votes
0answers
83 views

Debian on VM has web access but can't be pinged

I have just installed Debian on a Virtual Machine. I have internet access on the VM and installed SSH. I then did a ifconfig and discovered that the IP address is 10.0.2.15 which is strange as the ...
1
vote
3answers
161 views

centos unable to access the internet

Problem Cannot access the internet. CentOS guest isn't receiving incoming traffic. Private network is fully accessible. Scratching my head here... I don't have this problem on ...
1
vote
2answers
139 views

Can I capture ISP SNMP information with Wireshark?

I am trying to do some heavy digging into SNMP, BPI+, ISP networks. Since wireshark can be used to capture network data, would I be able to use it to remotely capture my ISP SNMP agent information and ...
-2
votes
1answer
56 views

Should internet access be disabled on production servers? [closed]

We have Weblogic server and Database server on our production environment. Should we disable internet access on these servers to protect them from hacking ?
0
votes
1answer
209 views

Where do local ISPs' core networks connect to? [closed]

Where do local ISPs' core networks connect to? Do they connect to the Internet Backbone owned by AT&T and Sprint (among others) or do they connect to an IXP (Internet eXchange Point)?
1
vote
1answer
76 views

How did we manage to block connections to our VPS?

For the last week we've been struggling to get connected from inside our network to a VPS where we host some files for users of our product. It's up for everyone else, down for us and not blocked by ...
2
votes
1answer
318 views

Networking ARP table in windows cmd

I am reading the book practical packet analysis and I have just learned the fundamentals of the ARP protocol. They also added something about the arp -a cmd command. I'm curious about some of the ...
3
votes
3answers
348 views

Network Latency and Timing as shown by Chrome

I'm trying to understand why a static image being served by IIS is taking ~ 182 ms to load. Using chrome I captured the following timing information. When I request the same image by opening ...
1
vote
1answer
55 views

Microwave Link Latency

An internet provider installed us a microwave link: The issue is that: The ping from our side to the gateway is about 1-2 ms, which is great, but it remains like this for only 12 hours, then it ...
1
vote
1answer
525 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
130 views

client's not receveing internet with dhcp. does if i use static

i reloaded my ad, dhcp, dns server 3 day's ago. server 2008 enterprise. and we are having a problem. only the server issue's the ip. all files share's, ad, etc works. can ping and remote desktop ...
0
votes
1answer
43 views

What are the recommended internet security measures to take? [closed]

I have built a speical-purpose server, the only purpose of this server is to download some data from a remote(internet) data feeder and do some data processing in the server as well. The only ...
3
votes
2answers
118 views

New IP addressing from ISP

We just got a new Internet fiber service. Our ISP gave us a /30 for WAN and /29 for LAN? I have never seen this when setting up a new ISP service. I was always given a block of ip addresses (if ...
2
votes
1answer
522 views

“Automatically Detect Setting” vs “Use Automatic Config Script”

I would like to know, in Internet Explorer, the difference between "Automatically Detect Setting" and "Use Automatic Config Script". I think I know that "Automatically Detect Setting" makes the ...
2
votes
1answer
75 views

Protect a public-facing PostgreSQL server against abuse

I have a Postgres database containing public information that I'd like to expose to the internet, for anyone to use. What steps can I take to prevent: Excessively expensive queries that could hog ...
-5
votes
1answer
189 views

Solution for Proxy tools like Hotspotshield etc [closed]

My state has a strict policy about porn. We blocked thousands of IPs (of Porn Sites) so that from within the state they can not be accessed. Which was working fine for like less than a month and then ...
0
votes
0answers
392 views

CentOS - Increasing Users Download & Upload Speeds

I have has some clients report that their download speed from my web and ftp servers max out at 4.5Mbps for them, to me thats awesome, but now i am wondering why it stop at 4.5. The services are ...
0
votes
0answers
35 views

Weird internet/network behaviour - certain sites not available

I've always had this problem where certain websites stop working in a browser. I can then just use another browser. Then at some point these sites would stop loading in all browsers. This could ...
0
votes
1answer
229 views

HP MSR 30-10a Router - Route Traffic over Default Route

We have a brand new HP MSR 30-10a Router. We have a fairly simple routing situation - we have two IP blocks, one which has a route out. We need things on the first block to go through the router, and ...
0
votes
1answer
188 views

Unable to access my website even after flushing DNS

I am having weird issues with my website, everyone except me is able to reach my website but whenever I try to login to my website I am getting a Server Not Found issue. The website has never had this ...
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votes
2answers
90 views

Collecting Web traffic and monitoring reports [closed]

My company is a med home health company and I have been tasked with seeing what people are doing on the internet. There's been a lot of people complaining of people shopping, surfing internet, etc on ...
4
votes
1answer
407 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 ...
2
votes
1answer
593 views

Sharing an internet connection from a virtual Windows 2012 AD Server

I have a virtual HyperV network used by a number of virtual development and testing servers and an all-in-one Domain, DNS, DHCP server; I want to keep the many virtual servers separated from our main ...