Networking

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Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

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What do you use when you need to run a cable through a wall or from the outside of a building to the inside of a building? I want to put in some kind of "grommet" just big enough to get one network cable (with ends) through. The walls will vary in thickness.

   My first thought was to put a short PVC pipe through the wall then find some kind of "flange" to put on both sides of the PVC pipe to hold it against the wall on either side. Surely there is something out there that is a "professional" way of getting a cable through a wall or from the outside of a building to the inside of a building. I just don't know what it is :)
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Cloud Class® Course: Microsoft Azure 2017

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My apology our experts , I closed the the question about a code to re link  access to sql server back end on different network wrongly without proper testing. The code below could not work see the errors below:

(1) I have put the code in a module and tried to call it on a login form as follow ( Call AttachSqlServer), this was called on the on-click event, it gave me an error as argument not optional
(2) The following part of the called is also not compiling:

Err_AttachSqlServer:
    Call ErrorMox
    Resume Exit_AttachSqlServer
   End Function


I the issue is on the call function

Below is how I have replaced the parameters:


Public Function AttachSqlServer( _
    ByVal Hostname As String, _
    ByVal Database As String, _
    ByVal Username As String, _
    ByVal PassWord As String) _
    As Boolean

' Attach all tables linked via ODBC to SQL Server or Azure SQL.
' 2016-04-24. Cactus Data ApS, CPH.

    Const cstrDbType    As String = "ODBC"
    Const cstrAcPrefix  As String = "dbo_"

    Dim dbs             As DAO.Database
    Dim tdf             As DAO.TableDef
    Dim qdf             As DAO.QueryDef
   
    Dim strConnect      As String
    Dim strName         As String
   
    On Error GoTo Err_AttachSqlServer
   
    Set dbs = CurrentDb
    strConnect = ConnectionString(Hostname, Database, Username, PassWord)
   
    For Each tdf In dbs.TableDefs
        strName = tdf.Name
        If Asc(strName) <> Asc("~") Then
     …
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Hi,

I would like to prevent users from selecting a guest network that resides close by our operations.  Our users are mobile, and the mobile devices are always connected to the enterprise wireless SSID.  However, some users are tempted to try and connect to the guest network of a nearby business.  In doing so it causes some pains when trying to reconnect to the enterprise network, and any remote support.

With that in mind I would like to "hide" the networking icon through some sort of registry update - if possible.  However, I'm open to other suggestions but they would have to be limited to changes on the local device.  I wouldn't be able to use a solution that requires making an update to the enterprise environment.  For example, creating/modifying an OU, introducing a 3rd party solution, system wide group policy changes, etc.

All mobile devices use OS WIN 7 and WIN 10.
Thanks.
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Hello, I have a query regarding Spanning Tree / Loop Prevention across MC-LAG links.

We've recently taken over a network of a hub / spoke design with all of the access switches feeding back to our Core (two HP 8400's). The core is setup with MC-LAG link which prevents Spanning-Tree being enabled. Reading the 8400's documentation my understanding was that this was by deign, and MC-LAG would handle any loops.

Recently, one of our onsite technicians introduced a newly built edge switch which brought the entire network down. Unfortunately part of the config on this switch had missed enabling STP, and when he plugged this new switch in it had a looped cable back to itself. My issue with this is why this would have introduced such a massive loop across the entire infrastructure, while I would accept there will be a loop in the edge of network location, taking the new switch down, how it carried on through to the core is my concern.

My query is to what I'm missing with the Core switch. We have Loop-prevention enabled on both nodes. Is there a method to enable spanning tree, or is there a better protocol I should be using instead.

Hoping the above makes sense, apologies if not.
Thanks in advance!
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Overview
 
We currently host AD on our own servers in our own server room and a second AD (set up with trust) on our remote network hosted at Rackspace. We want to move everything into the cloud. Including AD within the next 30 days.
 
We use Office 365 and our preference would be to ONLY use the Azure AD within our O365 subscription, however, we believe this may not be possible. We have detailed below our current network configuration.
 
We would like someone to
 
a)      Provide us with a list of options detailing pros and cons
b)      Once we have picked one of the options we would like someone to provide us with a detailed plan explaining how we implement the solution
 
Current Network Configuration
 
We have
 
1.      8 SQL servers
2.      1 File server
3.      3 servers and a SAN making a virtual environment hosting several machine
 
All servers are windows servers on 2008, 2008r2  and 2012
 
We currently use AD for
 
•      Local users authentication
•      SQL server authentication and user permissions
•      Windows server authentication (Windows 2008 onwards)
•      External user authentication – we deliver a remote Vb6 application to ‘00’s of external users using RDP who authenticate using our local AD
 
AD permissions on the above are managed via groups and at individual level.  We also use AD to manage our SQL server permissions and group policy to manage devices on the network.
 
We also have some servers with our hosting partner Rackspace
 
1.…
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External RDP setup for Windows Server 2016:  The firewall gets a response AGED-OUT from server:  The traffic is allowed but no response from Server:  

New Windows Server 2016:
The network firewall are ok because I've reach out to networking and they confirm.  We have allowed RDP on a specfic non RDP port for one IP:

For security I'll Mask. Vendor IP and PORT

IP X.X.X.X = vendor IP
RDP port XXXXX = I changed from 3389 to a new 5 digit:

In Network Reg I changed the port number:  I followed this:  https://kb.iweb.com/hc/en-us/articles/230242388-Change-the-Remote-Desktop-Connection-port-to-your-Windows-Server  (RDP PORT.jpg)

I've allowed RDP  - RDPuser.jpg RDP enabled.jpg


I've added incoming FW rules:  RDP FW RULE  
I read on some forum you need TCP and an UDP rule for RDP.  Both have the same new special port #

What am I missing?  I've been banging my head on this one...
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I've tried various methods to get my Primary Domain server to hold the correct time and synch it to my computers/users through the domain.
The only way I can get the correct time is to use AtomTime Pro. But it doesn't synch to computers. My secondary DC has the correct time through w32Time. I've tried synching the Primary to the secondary. That doesn't work. Tried: w32tm /config /manualpeerlist:timeserver /syncfromflags:manual /reliable:yes /update ( with the timeserver as the secondary). I've followed all kinds of internet helps. Nothing works to get the domain synched.
Thank you.
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Dear Experts, we  have  these devices, can you design a network diagram that provide HA, security, VPN and reliability ? We have 500 users, 30 servers VM in 4 physical hosts, would like to separate server farm and user LAN. It can separate Internet connection as well

3 x Firewall sophos XG310
3 x Core Switch Cisco 3850 48ports
2 x Access Switch Cisco 2960 24ports
20 x Access Switch Cisco SF200 48ports
All connection is CAT6

Many thanks in advance!
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I'm having a little problem and I hope you guys can assist me with it, I have 5 VLans --- this is the setup on PFsense

LAN-VL10-VL20 all use the dns resolver and is filtering web content via squid and pfblocker

VL30-VL50 uses the DNS forwarder on port 5353 and arpa back to Vl20 on ip address 192.168.20.1

Vl40 is uses the isp dns and do not use the resolver or dns forwarder - this is the guest network

The problem is Squid and PFblocker does not filter content on these three network  Vl30-Vl40 and Vl50

All these interface are selected in the interface section on squid and on PFblocker.

Any Assistants will be greatly appreciated
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Just found only a couple of 2012R2 servers suddenly cannot access two particular network shared storage servers (two Data Domain storage) using \\hostname with the following error:

\\hostname is not accessible. you might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions.
 This server's clock is not synchronized with the primary domain controller's clock.

Those servers are VMs among two Hyper-V hosts so they sync time with their hyper-V host. It's hard to believe if it is really a time related issue since all other 2012R2 servers on the same hyper-V hosts don't have this issue.
At the same time the couple of 2012R2 servers can access other network shared folders without a problem whereas other 2012R2 servers can access the two particular Data Domain storage servers without a problem.

The most strange thing is, if I use \\IP Address, I am able to access. It appears to be not a DNS issue since Ping -a hostname can result in its IP without a problem. Moreover, I did try putting the hostname and its IP in the hosts file, to no avail,

It seems like the issue coincides with some Windows update last month. The issue temporarily got fixed right after we installed all Windows update but the issue came back after 2 days. At this point, i'm kind of totally defeated. Can you help?
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The Ultimate Tool Kit for Technolgy Solution Provi
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I have a Always on VPN in Server 2016 setup and am having issues with the remote clients accessing the production network through the VPN . Here is an example of my setup:

Prod network - 10.1.1.*

DMZ Network - 172.10.1.*

RAS VPN Static pool - 10.10.1.*

VPN server is on domain, has a prod network address, and DMZ address.

The VPN is currently working in the aspect that when i connect to the VPN from my Windows 10 machine(On external network), the Win 10 machine gets a 10.10.1* address. But that 10.10.1.* subnet cannot access the prod network. Do I need to setup Static routes on the VPN server to be able to get to the prod network?
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I have a new client with a light speed web filter appliance. It's currently licensed for just web filtering. Does anyone know if they also offer licensing for virus/malware filtering and detection? I am waiting for a call back from sales but this is time sensitive.

Thanks
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We have an old version of CR (Version 6 or 7?) that came with our accounting software in 1998.  With it we are able to design reports and "compile" them (i.e. create .exe files) for distribution to other users on our network who have a need to generate various accounting-related reports for viewing and/or printing.  So, those client computers are able to run any of the reports, answer input prompts (parameters) that are in the network share but they can't change the structure of the report itself.

We are now researching and planning to upgrade to the latest version (CR 2016?).  SAP pre-sales support is telling us we can no longer distribute the compiled versions for other users on our network.  It's unclear to us if they fully understand what we're doing and whether this "barrier" real and, if so, is a technical barrier or a licensing barrier.

We are hoping to take the old .rpt files and convert them to the latest version.
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I need to transfer a 500GB Table(single) from one oracle database to another database using a 500Gb network. What can be the most efficient way?
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Some users within a Server 2016 AD network sometimes intermittently disconnect from a Kyocera Task Alfa 3051 copier and are unable to print.

This happens in an office with around 50 laptops. When this happens it only affects one laptop at a time and all the other laptops are able to print without any issues.

The printer will become grayed out and the users will receive errors printing to it from their Windows 10 computers. When this happens the printer that is automatically mapped by Windows 10 and the printer that is shared through Server 2016 and through Active Directory are both affected. No other network or internet connectivity is lost on these laptops when this happens.

This happens even whether the user's laptop is connected via Wi-Fi or a network cable.

Whenever this happens I check the Network properties on the affected laptop and find that the Network type is either Domain or Private and is never public.

To fix this issue I will have to delete the printer from the Devices and Printers applet within Control Panel and will have to re-add the network printer back to Windows 10.

What can be done to prevent this issue from occurring so these Windows 10 computers will always stay connected to this network printer and will never lose their ability to print?
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I'm trying to get a Cisco WAP321 to be a wireless repeater (meaning no ethernet cable) to a Cisco RV130 wireless router. I enabled wireless radio, selected the (RV130) device and wireless network as a "Trust"ed network. But don't know how to proceed to make it a standalone repeater without a network cable. I'd also like it to have the same SSID as that of the router. I could SWEAR I did this with Cisco support once upon a time. What am I missing?

Thanks,
Dana
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Local network using Windows Server 2016 with Essentials. Have need to login remotely on almost a daily basis. Have successfully setup the built in VPN. However, it is very unreliable. Frequently it stops working and then I have to run the Anywhere Access repair application in the Windows Server Essential Dashboard. That often ends needing to have me reinstall the certificate for the remote access. This whole problem is very irritating. When I was using Small Business Server 2011 the VPN never stopped working but now with Windows 2016 it occurs almost weekly and almost everytime a windows update is installed. Any help available? Or can you recommend a more reliable VPN service that I can install on my network than the built in VPN?
Thanks in advance for any help you can provide.
Rick Cowperthwaite
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I have an network with 200 users. we have 5 branch offices connecting through VPN. I have Cisco WAP571. I think it will be difficult to change the password across the users. Can i do this with GPO? Any ideas how this will work. I want to set up a radius server as well. what are the benefits of having a radius server?
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A customer of mine is moving their people from Office A to Office B, but is leaving the servers at Office A.

There are 5 networks in 3 different security zones that need to exist at Office B for the users, but the companies procurement department has vetoed using a Layer 2 type service because it's not in the current contract with their Telco provider.  :/

Net 1 - 100mb - Security Zone 1
Net 2 - 100mb - Security  Zone 1
Net 3 - 100mb -  Security Zone 2
Net 4 - 10mb -  Security Zone 3
Net 5 - 10mb - Security  Zone 3

The nets are all class C.  All the systems at Office B are new, and having different IP addresses is (amazingly / apparently) not a problem.

The Telco provider has sold them a pair of diverse 300 MB Ethernet MPLS circuits with three private VPNs which will be connected to two new Cisco 4431's at Office A and Office B that will both connect to all 5 network switches at Office A.  These routers will not directly route any packets between the 5 nets / 3 zones (there are other existing routers and firewalls at Office A that will do those tasks if needed), they are purely for connectivity between Office A and Office B.

Within the order notes for the circuits, I see the wording "Each MPLS CE router will utilize the Multi-VRF feature to segment traffic by application.  A total of 3 VPN's will be utilized."

I have no problems with routing protocol features (EIGRP or BGP) on high availability networks, and although I have never configured it …
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The Lifecycle Approach to Managing Security Policy
The Lifecycle Approach to Managing Security Policy

Managing application connectivity and security policies can be achieved more effectively when following a framework that automates repeatable processes and ensures that the right activities are performed in the right order.

Our SQL Server network connectivity is broken! I can only get on it via a terminal from VMware.

Our server is set to a 192.168.0.x address, gateway 192.168.0.xxx. Ipconfig shows a 169.254.x.x address, I'm not sure why it is getting this.

Despite several re-boots I cannot ping it's IP address and several customer facing apps are failing. DNS looks OK, other servers with same settings are fine.

Can anyone help please!
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What is the best way to achieve implementation of 42 cisco switches at client location? Also I need help with how to prepare or what to include in SOW(scope of work). I really appreciate your help.
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I have a question about best practices regarding network topology.

I operate a relatively small network.  I have my network broken down into 5 different networks:

10.1.1.0 /24 - for device management - VLAN 1
10.2.0.0 /16 - for servers (original IP address space before I came to company - everyone was on the same network with the servers) - VLAN 2
10.5.1.0 /24 - For wired Ethernet devices - workstations and laptops - VLAN 5
10.10.1.0 /24 - For Wireless devices - laptops mainly - also a VLAN 10
10.254.254.0 /29 - Very small subnet, used for a VLAN 254 between our main switch up-link, web filter and firewall device.

That last subnet is where my question lies.

Is it a good practice to concentrate egress/ingress Internet traffic into its own VLAN?  When I set this up 7 years ago, I thought it was.

We are getting a new firewall/router - it will replace our current firewall and web filtering solution.  I am wondering if I should keep this setup, or if I should just make the new device part of the 10.2.0.0 network and call it a day?

The other idea I had, since this new firewall has many LAN side ports was to eliminate VLAN 254 and use 3 separate up-links for VLANs 2, 5 and 10 on my main switch to the new firewall.

My other thought was to use a trunk port for the up-link to the firewall and configure it like router-on-a-stick using sub-interfaces on the firewall.

My networking skills are a little rusty, and was hoping to hear from others that may be wiser …
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Hi Support

what is the command to reset the local password for one of the local server by using power shell script?
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We have a 2012 R2 Hyper-V host running two VMs. One of the VMs is a terminal server with 10 remote users. The other a DC.

The CPU usage on the terminal server VM is maxing out at 100% and users are experiencing terrible performance.

* Memory (32GB) and Network usage are low. The physical drives are SSD in RAID5.

The CPU on the Host is an Intel® Xeon® Processor E5-2640 v2 with 2 Sockets and 16 cores, giving 32 Virtual Processors.

Any advice on allocating CPU resources  to the VM to improve performance would be greatly appreciated?
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I had this question after viewing Powershell export-csv ... how to include null or error condition for any object that failed?.

I have a requirement to obtain complete directory listing of all available partitions for multiple servers(about 200 servers). At the moment I am executing the following PowerShell script on each server, each partition individually and manually. Is there a better way / easier way to accomplish this. I have complete admin access to the network and all my servers are on the same domain.

Also, when i execute the below script I get a number of errors, that are displayed on the console, is there a way for me to get the errors log in a separate file.

Script Example :

Get-ChildItem -Path C:\ -Recurse -Force | Select-Object -Property Mode, Length, Name, PSChildName, PSDrive, PSIsContainer, BaseName, FullName, Parent, Exists, PSPath,CreationTime, CreationTimeUtc, LastAccessTime, LastAccessTimeUtc, LastWriteTime, LastWriteTimeUtc, Attributes | Export-Csv -Path C:\Temp\data6.csv


Errors Example:

Get-ChildItem : Access to the path 'C:\$Recycle.Bin\S-1-5-18' is denied.
At line:1 char:1
+ Get-ChildItem -Path C:\ -Recurse -Force | Select-Object -Property Mod ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : PermissionDenied: (C:\$Recycle.Bin\S-1-5-18:String) …
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Networking

93K

Solutions

67K

Contributors

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.