Questions tagged [nlb]

Network Load Balancing (NLB) is a component in Windows Server operating systems that load balances network traffic (sent to a cluster virtual IP address) among multiple servers in an NLB cluster.

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How companies use single VIP for multiple L4 services

I have two public IP's alloted by network team NAT'ed to two private IP x.x.x.2 and x.x.x.3. This private IP is assigned as a VIP on my Load Balancer. I am wondering how these two VIP's can be used ...
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269 views

Does AWS Network Load Balancer decrypt packet in TLS termination mode?

Architecture: client <-- TLS --> AWS Network Load Balancer port:443 <-- TLS --> backend server port:443 In the above architecture, TLS is terminated at the network load balancer (NLB). Is TLS ...
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224 views

“Could not read configuration of interface” adding new server to NLB cluster

I have a new server (Windows Server 2019) which I am trying to add to an old NLB cluster (It was set up on servers which previously did not consist of any servers newer than Windows Server 2003) In ...
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329 views

Problems connecting 2nd host to NLB cluster

I've recently deployed Hyper-V into my hosting infrastructure and i'm trying to setup windows network load balancing and ARR so that i can have 2 VM web servers that are load balanced by 2 ARR servers ...
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Hyper-V, NLB, ARR cannot connect 1 host to another [closed]

I'm having trouble connecting 1 host to another even with windows firewall off on bot the VM and the host machines they cannot seem to find each other. Running Windows Server 2019 HyperV Host1: VM ...
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68 views

Occasional Timeouts with Zabbix agents behind an AWS Network Load Balancer

My architecture in AWS is as follows: There are 2 identical zabbix agents (based on zabbix/zabbix-agent:centos-4.0.11) each one running on a different EC2 instance. Zabbix server runs on a third ...
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753 views

Does AWS NLB accept traffic with destination IP's different from it's own?

Looking at using NLB to load balance two L3 transparent appliances, both of which listen on port 8181. But traffic hitting those appliances have arbitrary destination IP's. When I created the NLB, its ...
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3answers
686 views

Can't access EC2 instance, but not NLB in other VPC

I've recently started the process of switching from AWS ELB to NLB, and I'm facing some connectivity issues. We have 2 VPCs. In VPC1, both EC2 database servers, old ELB and NLB is located. In VPC2, ...
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61 views

Implementing a Highly Available backend gateway for a cloud app on AWS

I have 2 EIPs allocated for a cloud app, which are used in round robin DNS. I'd like to have some sort of high availability mode for our 2 gateways (proxies) which are associated with those EIPs, so I ...
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171 views

Dualstack support for IGMP multicast NLB on Windows 2016

I have two Windows 2016 VMs set up as an NLB cluster. Each guest has two interfaces, one of which is for the NLB, the other for other traffic. I've added an IPv4 and an IPv6 address to the cluster. ...
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247 views

Windows NLB : Get-NLBClusterNode reports Invalid Data

I've setup a cluster of 2 Nodes using Windows Network Load Balancing feature. Everything is well setup, my cluster For moinitoring purposes, I'd like to get the status of the nodes within the ...
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312 views

Microsoft NLB (Network Load Balancing) and the OSI Layer

I'm unable to track down in the documentation at which layer MS NLB operates at. I'm pretty sure it's unable to interpret Application Layer 7 traffic, for example knowing that HTTP 503 is actually an ...
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332 views

New-NlbCluster Access denied

This is a question and answer at the same time that I want to share to the community because google search "New-NlbCluster : Access denied" did not bring any results. Problem: Starting from 15 Apr ...
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329 views

Windows NLB is not forwarding UDP

I have setup Windows NLB which works fine with http. But it is not forwarding the UDP reply to the client. Backgroud: NLB - 192.168.1.10 Host1 - 192.168.1.11 Client - 192.168.1.5 I am forward all ...
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353 views

Why is IIS not allowing TCP connections from external IPs through NLB

I've got a development web server environment consisting of 2 Windows 2012 VM's configured with NLB (Multicast mode.) They are each using a single network adapter with 2 IP's assigned: the shared NLB ...
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293 views

Will putting 2012 R2 RD gateway server into Drainstop disconnect currently active users?

I have had a bit of a search for clarification on this, but have only found info on draining session hosts. I need to make some amendments to our 2012 R2 gateway server VMs, but due to the nature of ...
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35 views

Network load balancer - scheduled host stop

I've three servers on a NLB Windows server 2012. At the moment each of these machines has a site with a scheduled app pool refresh which I want to handle by taking that node off line while the app ...
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4k views

Is it possible to run HAProxy load balancer on Windows Server 2012 R2 Base for production?

I want to run HAProxy on Windows Server 2012 R2 Base for production. I read this blog: http://zcourts.com/2012/09/29/install-haproxy-on-windows-cygwin-good-for-testing and it conveys that HAProxy on ...
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274 views

Setup Windows 2012 NLB with two internal servers

Im trying to setup a load balancing between two server on which a IIS website is running. I have a third server which actually is free to be used, i thought this one might be used to balance the load ...
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96 views

how should i store files for iis web root on windows servers in nlb configuration?

I have multiple windows virtual machines in a network load balanced environment. They each have a local disk (C: drive) that has the files for delivering our website (inetpub/wwwroot). The problem ...
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951 views

Should I disable “register this connection's addresses in DNS”?

I have DC and aditional DC, both have DNS services and AD replications on. I have configured NLB cluster to used with IIS services on same servers. Problem is that the NLB cluster adress popups up ...
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5k views

Providing High Availability for NPS

I need to ensure high availability for RADIUS service in Windows Server environment so it can withstand loss or even temporary downtime of any particular server holding NPS role. Most of technet ...
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1answer
7k views

Issues with NLB on Windows 2012

I'm running into an issue when setting up NLB for three virtual servers on vSphere. Each server is running Windows Server 2012 and has a single static IP address. One of the servers has a second NIC ...
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479 views

Windows Service Bus and Network Load Balancing

I'm looking to build an HA service bus farm, hopefully using Microsoft NLB on Windows Server 2012 R2, something like what is described here. In the output below 9354 belongs to Microsoft.ServiceBus....
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2k views

Windows Server NLB vs hardware-based NLB [closed]

Can somebody with extensive experience explain me what are the selling points of hardware-based NLB over Windows NLB and what are major/main disadvantages of Windows NLB? I recently read through some ...
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4k views

Windows Server 2012 NLB logging

Can somebody clarify to me what are the best practices when it comes to configuring logging and monitoring for Windows Server 2012 NLB. I believe there are 2 types of logging from management service ...
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NLB - detect service down

I am trying to work out how to use PowerShell to detect when a load balanced (NLB) Apache service is no longer accepting requests (but the service is still running). Windows NLB detect dead IIS? ...
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1answer
4k views

One Network Load Balancing host can't see the other

We have setup a Windows Network Load Balancing (NLB) cluster of 2 hosts for our new staging environment. The cluster initially works fine, but eventually, after stopping and starting one of the hosts ...
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1k views

Microsoft Network Load Balancing - Hosts Won't Converge Simultaneously

I am running Network Load Balancing on two Windows Server 2012 R2 Datacenter VMs in a VMWare ESXi Host environment. The cluster and hosts are configured to use multicast and all are on the same VLAN ...
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1k views

Windows Server 2008 NLB doesn't respond to ARP request

I have two instances of Windows Server 2008 running in Hyper-V VM's. The two instances are configured in a multicast NLB. I can ping either node from another subnet, but I get a timeout when pinging ...
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530 views

ARR Load Balance with two Machines - Always redirect to same Site

described steps for each setup. Created a sample Application WebShareTest , hosted the application in M1(IP 36) on port (80) and same Binary I hosted in M2(IP 210) (on port 8070) I pointed some ...
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Load balance 2 wireless adapters on 2 different computers (ie. w/NLB)

I have 2 physical servers running 2012R2. Each box has its own wireless nic. I also have 1 SSID to which both servers/WLANs connect to. While trying to setup NLB, I noticed the Wireless NICs didn't ...
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186 views

Network Load Balancing VMWARE [closed]

Is network load balancing (NLB) with windows server 2012 using unicast and active-passive mode supported on VMWARE ? More details: I have 3 http servers running inside a windows server 2012 ...
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2answers
2k views

Does Windows Network Load Balancing require any specific ports to be open?

I have two Windows 2012 servers, joined in a Windows Network Load Balancing cluster. I have been trying to find how the NLB heartbeat message is exchanged between those servers (to make sure it will ...
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1answer
838 views

Windows multicast NLB with Linux clients

I'm (on behalf of a client, anyway) having some troubles with Linux accessing a multicast NLB cluster hosted on Hyper-V (waiting for more information on what version, but I don't think the version is ...
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1answer
138 views

How do I know which node in a cluster answers?

I have set up an NLB with two servers (nodes) which are running the same service. The filtering is single host, because I don’t want them to run at the same time, because there is data in the cache DB,...
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1answer
927 views

NLB/DFS between servers at different locations?

I currently run a web application on a single VPS but have the need to make it redundant so that the website will not become unavailable in case the server goes down for any reason. I have found that ...
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1answer
949 views

NLB ARR cross-node setup

Given: one ASP.NET web application 2 Windows servers with IIS installed (no more servers allowed) I want to enable load balancing / failover for that application, on both server and application ...
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2answers
2k views

How to synchronize applications between two terminal-service servers?

We have two terminal-service server and we use Network Load Balancing (NLB) to cluster this two terminal-service servers together. We need to have the same applications installed on the two servers, ...
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317 views

Two NLB mutlicast clusters on the same VLAN processing same traffic

I have an older ISA2006 based NLB cluster which I plan to migrate to a new TMG2010 NLB cluster. I need to have both clusters active for some time during migration (with different IPs of course). Both ...
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1k views

Drainstopping NLB via powershell remotely

This question was asked by a colleague on SO here, though it was suggested that we ask it here instead - apologies for the cross posting. Server is Windows Server 2008 R2 - UAC is disabled on the ...
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1answer
512 views

NLB - Stop IIS Site 1 - Will it now alway go to IIS Site 2?

With Windows Network Load Balancer (nlb) if I turn OFF a single IIS Site on Box 1 Will traffic be automatically redirected to the same corresponding site on Box 2? Thanks
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95 views

Is there a primary webserver in a NLB scenario?

I help administer a small NLB that points to two Windows Servers running IIS which share a configuration. The sites' flat files are replicated using DFSR. I get the gist of how this all works from ...
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1answer
669 views

Setting up NLB in a VLAN

I have a network layout like this (ESXi hosts): Internal Network + +-----------------+ ...
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1answer
2k views

How do you setup FTP with IIS Manager Users in an NLB environment with shared IIS configs?

I've setup a 2 node NLB cluster and used the following to share IIS configs between them. http://blogs.technet.com/b/meamcs/archive/2012/05/30/configuring-iis-7-5-shared-configuration.aspx The IIS ...
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1answer
64 views

Network Load Balancing Manager failover

I would like to be notified when one of my clusters in Network Load Balancing Manager starts up or fails. The documentation seems to infer that there are no advanced scripting, logging, or ...
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1answer
5k views

Windows Remote Desktop Cluster - can we force some users to a specific server?

Given an RDS cluster with NLB, users connect and login to one of the servers at random. But there is one program that's only available on one of the servers (licensing reasons). Can we force a group ...
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862 views

how to install 2 simple ssl certificates on 2 web site having the same ip, in iis8?

how to add a second ssl certificate to the same server for two different web sites?. How to setup a second ip for the second web site considering that the server is balanced? more information: i've ...
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1answer
734 views

Misunderstanding about packet travel over NLB-Network

I'm doing a LAB about NLB(Network load balancing) on Windows Server 2008 - Unicast mode. But I can't understand how the packet travel across the Network... http://technet.microsoft.com/en-us/...
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686 views

How Application Request Routing(ARR) will work with IIS Web Services

I currently have 2 servers on Which nlb and application pools are running .Since the nlb doesn't recognize, that if an application pool has failed, it sends the request even when an application pool ...