3
votes
2answers
275 views

Can you use WMI to determine if a connection gets its DNS servers from DHCP?

The DNS server search order for a network interface can be read from Win32_NetworkAdapterConfiguration like this in Powershell, or programmatically using .Net ManagementObjects: > $NICs = ...
2
votes
1answer
2k views

What else does “netsh int ip reset” do?

According to this KB article when you run the "netsh int ip reset" command, all it does is to reset the content of two registry keys: SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\ ...
-1
votes
1answer
92 views

Is their an official tool to tweak Windows 2008 server TCP configurations?

We are running scripts that initiates numerous TCP connections and disconnects right away. It's just to test if the remote report is opened and responsive. But we are having random strange issues ...
2
votes
1answer
133 views

Enabling TCP/IPv4 through Windows PE

From RDP, i've disabled the TCP/IPv4 protocol by mistake and now, obviously, i can't use rdp anymore to re-enable it. Is there a way to enable it again from Windows PE?(OVH rescue pro)
2
votes
1answer
58 views

Random three minute delay for database server connect

we use InterBase on a Windows 2003 server, and in random intervals the client connection to the server takes 180 seconds (three minute) longer than usual. The application does not "hang" with the ...
0
votes
2answers
67 views

Why would a process be showing an outbound connection from a 169.254 address when there's no unconfigured adapter?

I have a system that has several network adapters, only one of which is enabled. That adapter has ipv4 only enabled and it has a single IP address. It was previously part of a team. The team was ...
3
votes
3answers
2k views

Windows 7 DHCP Default Gateway not Overridden by manual Default Gateway

We have recently installed Windows 7 for student computers. All student computers must be routed through our content filter which is located at 192.168.0.63. This was done in WinXP by adding a Default ...
3
votes
2answers
1k views

custom route not working on windows

My windows laptop is directly connected to 192.168.1.0/24 (wireless lan). I access 10.21.0.0/16 though a router that is connected to both networks. The routing works fine with this configuration. I ...
1
vote
0answers
572 views

NIC Teaming , Multi-Homed, Active/Passive

I'm fairly new to NIC Teaming.. So I apologize if I’m not making any sense while describing this. I’ve, of course, set up plenty of simple Active/Active NIC teams for our servers without any issues ...
4
votes
1answer
2k views

TCP Windows Size vs Socket Buffer Size on Windows

I am new to Windows networking. When people talk about TCP tuning on Windows platform, they always mention about TCP Window Size. I am wondering whether Windows uses the concept of "Socket Buffer ...
-3
votes
1answer
154 views

Can a large number of network hardware interrupts cause a machine to be underutilized?

I don't know much about networking sorry. I'm building a client / server where the server streams a lot of data to the client and I'm trying to maximise throughput (through TCP). If I run both client ...
0
votes
1answer
418 views

Windows 2008 blocked TCP connection

I have a strange problem that I don't know how to diagnose: I have a small test application that tries to make a socket connection to an RTU on port 5001 (can't change this). The application works ...
0
votes
0answers
50 views

connection monitoring application

Could you advise me some tool that allows to see traffic speed per connection? I have found currports tool, it's nice, but it doesn't show speed. Also I use Outpost Firewall for this purpose, but it ...
5
votes
2answers
8k views

What do all the settings in the Advanced TCP/IP Properties DNS Tab Mean?

Can someone explain TCT/IP > Properties > Advanced > 'DNS' tab please? I know what DNS, primary DNS suffix and DNS suffix are, but this tab has some confusing properties.
0
votes
1answer
63 views

Connecting to a Windows server that has an active VPN connection

In my company we connect to various customers using VPN. We have a dedicated Windows server where the VPN clients are installed, and if we need to do customer support, we have to physically log in to ...
2
votes
3answers
681 views

Windows 2008 TCP Performance

Some background... I am currently building a domain drop catch application using C#. It uses a single Socket, which sends data through an SslStream. I have spent weeks on the app and I am 100% sure ...
0
votes
2answers
2k views

Windows Server 2008R2 - can't change or remove the default gateway

We've installed VMWare Server 2.0 on Windows 2008R2. After some time playing with it (actually only removing host-only and nat networks, and binding adapters to the specified vmnets) we've noticed a ...
1
vote
2answers
2k views

Is there a limit to how many sites can be hosted on a single IP address when using HTTP Host Headers on Windows 2008?

For reasons that are lost in the mists of time, our older Windows (2000, 2003) servers have been configured with a "Administrative" IP address and three further "Hosting" IP addresses. There are also ...
0
votes
1answer
149 views

No transmission via IP

I'm using netstat on Win XP to check protocol transmission details for TCP, IP, and ICMP. There is transmission only in TCP. No transmission in ICMP is understandable since it's for errors and I ...
12
votes
2answers
34k views

Which is the default TCP connect timeout in Windows?

Which is the default TCP connect timeout in Windows? There is a registry key to configure it or it's set dynamically?
2
votes
2answers
6k views

Anyone know of a free flood ping utility for Windows? [closed]

Does anyone know of a free ping flood (some people call it flood ping) utility for Windows? I want something portable that I can install anywhere. I use ping flooding to primarily test for packet loss ...
1
vote
1answer
1k views

How can I make WinXP bind to ports other than 1025-5000 for outgoing TCP connections?

(I originally posted a similar question on StackOverflow but readers recommended I post here instead) When you create outgoing TCP connections, most applications let the operating system choose which ...
5
votes
6answers
1k views

Looking for an open source real-time network analysis program

Can somebody recommend an open source real-time network analysis program? What I'm looking for the program to do is display a graph of bandwidth usage by IP within our internal network that can ...
2
votes
1answer
152 views

NetDiag + TCP Blocking?

We are facing some issue with the sharepoint 2007 timer jobs everyday at a specific time, so decide to track the tcp blocking informartion during those hours using NetDiag tool. We are not able to ...
2
votes
3answers
311 views

MAC address to IP Address on Same LAN in Windows

Is there some way for me to find IP address of machine connected in same LAN from its MAC address.
3
votes
1answer
653 views

How to make Windows honour an ICMP Connection Refused message after a TCP connection attempt

We have a tool which is used to manage a server process remotely over TCP. One of the tools features is to check if the server is running by attempting to connect to the server in a loop for a given ...
2
votes
1answer
846 views

IPv4 over IPv6?

In Windows, with IPv4 stack disabled, can I encapsulate IPv4 addresses over the IPv6 stack to reach an IPv4 host ?
7
votes
6answers
6k views

How do I view the TCP Send and Receive Queue sizes on Windows?

Linux netstat shows send and receive queue sizes. How do I get this info under Windows, specifically Server 2003?
3
votes
1answer
285 views

Which route when there are two physical connections?

I'm a developer, not an admin, so apologies in advance. In a small office I have two Windows Server 2008 boxes connected to a 100mbps router, which is fine for day to day running. I'm looking to ...
2
votes
3answers
4k views

Any free TCP socket monitoring application?

Please can you suggest any free application by which I can monitor the opening/open/closing TCP/IP sockets? Something that can tell me: Total number of sockets currently (different count for ...
21
votes
5answers
153k views

In Windows, using the command line, how do you check if a port is open?

I want to see if traffic gets through on a specific port on another machine. Is there a simple way to test for this?
21
votes
13answers
172k views

How to get a list of all IP addresses (and ideally device names) on a LAN?

Our network gave an error that there was an IP address conflict and I'd like to find what all the device IP addresses are. (I've also had need of that before). (update/clarification:I'm looking for a ...
2
votes
5answers
9k views

Windows 2008 Corrupt TCP/IP? (Ping access denied)

I'm having a weird problem on two Windows 2008 VMs (inside HyperV) running NLB. They were working at one point, but now TCP/IP appears to be corrupt. I cannot ping anything if logged in with my Domain ...
4
votes
2answers
6k views

Why does the TCP Chimney Offload feature on some ethernet cards fail to pass some network packets to the OS?

In http://support.microsoft.com/kb/942861 Microsoft reports that in some situations Microsoft SQL Server experiences network issues due to the network card having a TCP Chimney Offload turned on. I ...
11
votes
2answers
1k views

Multiple IP addresses per NIC

How can I have multiple IP addresses assigned to a single NIC? I remember doing this on Unix way back when. Can it be done on Windows?
6
votes
4answers
4k views

How to automatically assign a route to client in Windows Server PPTP VPN?

Is there a way to configure PPTP VPN on Windows Server which automatically tells the client to add a route for the private network? I have to do it manually on every PC (once) using following command ...