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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I have 12 cameras that are on the same Physical network but I am unable to find them in the application. The cameras show that they are on and others that are in the same cluster are showing in the Viewing program. I have tried Wireshark, which shows nothing, and I am trying to avoid resetting them, as I will have to get approval (and a bucket truck) to do that.
Anyone knows if there is any other way to get to them?
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Hi All
we have a strange issue, our employees used to access a  particular website but it now its not working properly in our office client machines, but it works perfectly on our DC(Roles:AD,DNS,DHCP) & Application server. but no client PC is able to access this website from our office, it will start work on client PC once we open the site from DC,  after 15 to 20 minutes, we have to refresh it again from DC in order to work for client PC, so appreciate if anybody can throw some lights 1. Site work perfectly when you try from DC2. Firewall is not blocking  any site 
No access
i have mikrotik that have ip on lan is i want when the client request this ip nat to external web server so the client will not knowing the ip of web server
so how i can do it ?
How do I setup a Sonicwall TZ300 to allow me to telnet into a server on the local lan behind the sonicwall?
Please could you help me, I am below as I am newbie to managed switches and would like to enable Web Console - Manage the Switch through the web interface for my CISCO 3650G, I would like this so that I can visualise a little better while I am learning to use the command line.

Currently if I visit the management IP using internet explorer I see the attached but I'm unable to see theCISCO 3650G IssuesCISCO 3650G Issues web interface, IE says page cant be displayed.
In a Hyper-v environment I have a VM (we'll call it B, Host is A).  A cannot ping B and B cannot ping A.  3 other VMs work fine. If I remove the network adapter from B and reboot, then shutdown and add the adapter back it will work for a minute or two then quit. No Firewalls are turned on. No Anti-virus involved. Event log looks clean. I want to back up the files from B to a hard drive on A and it won't work because of this issue. B is a server with MAS accounting software on it so its not just easy to create a new VM but I can if necessary.
hello i cant see my panoramic ip camera on the network . i connect it by wire but i cant access
Trying to log into a W2K server from Win7 and it rejects my username and/or password.
I am able to log in from a XP machine that is on the network.
I am able to remote in using those credentials, and I'm able to access all other machines.
The machines are running under VM ware. I have tried re-booting and have checked the workgroup setting
I can't see all the machines on the network on a new DC we set up. I can map to them and ping them, just cant see them all in File Explorer/network. I have a network that we just took over, the previous admin used a for the DNS / server name that the company does't even own. So to get around the issues we set up static routes for the internal servers. This seems to work fine on the current production server that we will be migrating to a new production server. It can now see all the machines on the network and they show up in File Explorer/network. I have checked all the obvious things, sharing is enabled, all the proper services are running etc. The DNS records between the new and old server match.

So what we have is as follows.

Current server 2008r2: Had to add an a record to point the to the internal IP now it seems to be working, it can see all machines on the network when you open file explorer.

Old Exchange server 2008r2 that use to be the production server: Moved mail to hosted solution, now it only has data on it that we will be moving.

New server 2016: It will be the new production server to replace these older servers. We added it to the domain, made it a DC. I didn't want to go any further because I can only see a handful of machines on the network. Oddly enough the same machines on the old exchange server are the same machines I can see on the new server. I'm sure I am missing something simple here?

Just strange I can see all…
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I'm working on a solution as a vendor over deployment model for CISCO NGFW with following interest:-

•      east-west traffic inside server farm for stopping malware lateral movement
•      user (access layer) to server farm for policy control e.g AV, IPS etc

Constraints / Concerns:
•      Currently there is no l4 policy control or firewall in place , network topology is flat.
•      don't want to buy layer 3 switch for inter-vlan routing
•      internet traffic is managed by another segment not to be passed through proposed ngfw.

Concerns from vendor integrator perspective

•      between application 2 application or App to DB server such traffic can be best addressed with a acl defined at ACL, no botnet, malware exploits or spread from server-server per say. The use of ips and av inspection will be counter-effective.
•      Further, connection between app to DB is heavy traffic , firewall will be kept looking for those connection for long time holding down mem, cpu and effecting throughput as well
•      terminate access to server farm ONLY to layer 3 device (ngfw) for policy control, ngfw compliance features (ips, av)

I'm looking your assistance if there exists an CISCO validated design either for or against the above solution. Thanks.

I'd like to see if a remote pc can connect to a server on a certain port via Powershell.
PSNMap does a great job of scanning to remote computer 
but howto do this from computer x, to computer y <=> computer z on port 123?


Might have something here via invoke-command but not sure if it DOES run correctly remote and also have a function which does a  check-remotecomputerport -destinationcomputer -ports
and should also clearly show "ComputerToWhichPortsAreTested" and "$ComputerFromWhichPortsAreTested".

$sb= { 
     function Invoke-PSnmap
	param (
		# CIDR, IP/subnet, IP, or DNS/NetBIOS name.
		[Parameter(Mandatory = $true)]
		[Alias('PSComputerName', 'Cn')]
		# Port or ports to check.

		# Perform a DNS lookup.

		# Scan all hosts even if ping fails.

		# Number of concurrent threads.

		[int]$ThrottleLimit = 32,
		# Do not display progress with Write-Progress.

		# Timeout in seconds. Causes problems if too short. 30 as a default seems OK.

		[int]$Timeout = 30,
		# Port connect timeout in milliseconds. 5000 as a default seems sane.

		[int]$PortConnectTimeoutMs = 5000,
		# Do not display the end summary with start and end time, using Write-Host.

	# PowerShell nmap-ish 

Open in new window

We have approximately 40 servers and workstations on our network.  Additionally we have some network printers and media devices.  From my desktop, if I browse the network, I see all the printers, media devices and even some phone if they are connected.  I see about 4-8 of the server/workstations, but never all of them.  Co-workers using the same hardware, same OS and OS version (win10) on the same network and even the same switch see all devices.

I can map to the devices.  I can ping all the devices by name or IP.  In a browser window, I can use the \\server-name\driveletter$ and access the folders on that server.  I just can't see it in the browse window.  I can RDC by name or IP address to every device on the network.
hello everyone !!!
                              i am implementing exchange 2016 on server 2012 r2 for testing. i am able to send email from one mailbox to another in my local network. all i need to configure my public dns and local dns record. my email also not delver from my exchange to other domain like gmail. i got the following massage.

Delivery is delayed to these recipients or groups: (


This message hasn't been delivered yet. Delivery will continue to be attempted.

The server will keep trying to deliver this message for the next 1 days, 19 hours and 59 minutes. You'll be notified if the message can't be delivered by that time.

Diagnostic information for administrators:

 Remote Server returned '400 4.4.7 Message delayed'

Original message headers:
 EXCNLG.CONTROLPRINT.LOCAL ( with Microsoft SMTP Server (TLS) id; Thu, 15 Mar 2018 16:31:52 +0530
 ([::1]) with mapi id 15.01.0225.041; Thu, 15 Mar 2018 16:31:52 +0530
From: mohit saini <>
To: "" <>
Thread-Index: AQHTvEDbtJyYA/WnZ0umgkO0ytMrhQ==
Date: Thu, 15 Mar 2018 11:01:52 +0000
Message-ID: …
Hello Experts,

I have got XTM 26 series watchguard Firewall in the company. We are now in the phase of upgrading internet bandwidth from 20 Mbps to 100 Mbps.  According to service provider, I have to setup firewall for traffic shaping but I am not sure watchguard support it or not?

Parameters to configure on firewall are; Shaping Rate, Shaping burst, Extended burst.

I do not want to go with other option of adding a router before the firewall, as it may stops all applications running in branch office.

Can anybody help me with?
Windows 7 Pro clients randomly disconnected from LAN.

I am having some network connectivity interrupted issues recently. Windows 7 Pro SP1 desktops and laptops are randomly disconnected from LAN. It had the following symptoms:
Type 1: Network icon on computer task bar had a yellow exclamation mark and client lost the connection to Internet. The network card was still kept with correct IP address from DHCP server. It will resume back to normal within a minute or two if you don't do anything. When forcing to disable/enable the network adapter or issue ipconfig /release and ipconfig /renew to reset IP configuration, it will fix problem and network connectivity is resumed.
Type 2: Network icon appeared to be in normal status, no yellow exclamation mark on it, as well as IP configuration, but computer lost the connectivity to all local network resources, couldn't PING any local servers and couldn't access Internet. Doing the same steps to reset network adapter will fix it.

Checked the network switches which these clients were connected, the switch ports did not show any link loss. Switches for clients are connected to the core switch ports on the same VLAN and core switch did not show link loss on the client VLAN ports. All other servers are on the different VLANs seemed to work fine without any issues.

There is no changes made on client computers and network equipment except applying Windows security updates as monthly basis.

Anyone knows how to troubleshoot and …
I have an HP 8100 Compaq Elite running Win7 that just recently downloaded the update KB4088875 which made the NIC unusable saying no hardware is detected. 3 other machines had the same issue, but they had restore points so I rolled them back and everything is working. But one machine has no restore points. Steps taken:

1. Booted into safe mode and deleted update KB4088875. Restarted and still no network connectivity.
2. Went in Device Manager and uninstalled the unknown Ethernet connection, restarted and plugged Ethernet back in. Still no NIC detected.
3. Attempted to download correct driver from a different laptop, and then using a thumb drive to install it on the broken PC.
4. The PC failed to open the thumb drive due to the fact it doesn't have the appropriate driver...

Any ideas?
I need to map network drives to copy a file !  I tried to use the microsoft suggested function getnextletter but am getting errors.
Seems the oDrives is not an object As I get object required at that line!

    Public Function GetNextLetter(DriveLetter)
          'Start x at the ascii value of the drive letter to start the search
       'unless something is passed in. This sample uses capital letters and
       'starts at F.
       If IsEmpty(DriveLetter) Then
        x = 70
        x = Asc(DriveLetter)
       End If
       Set oDrives = wshNet.EnumNetworkDrives

       'Step by two since the first item in the collection is the drive letter
       'and the second item is the network mapping
       For i = 0 To oDrives.Count - 1 Step 2
        If Chr(x) & ":" = oDrives.Item(i) Then
            x = x + 1
        End If
       GetNextLetter = Chr(x) & ":"
    End Function

The VBA that references this function is!

Private Sub Command0_Click()
Set objFSO = CreateObject("Scripting.FileSystemObject")
Set wshNet = CreateObject("WScript.Network")

strSource = GetNextLetter("F")
wshNet.MapNetworkDrive strSource, "\\TQFPRK06\project management\"
strDestination = GetNextLetter("F")     '<-- You can change the letter.  It represents the starting letter to work from.
wshNet.MapNetworkDrive strDestination, "\\TQFPRK06\Tech_drive\"
strSource = strSource & "test.xlsx"

objFSO.CopyFile strSource, strDestination & "\"
I have created Microsoft Network Load Balancer for one of my Web application which is hosted on IIS. I add both hosts in NLB cluster, it is successful. I have made cluster entry entry in DNS and resolving properly. I don't find any  misconfiguration but still If access website using cluster name or IP then it is not accessible while from individual IP of  hosts, it works fine. Where is gap help me pls? I am trying to access internally.
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Main office A  and office B have a vpn tunnel between the two locations via cisco RV325 at both locations.   The vpn stays connected other than occasionally drops.  We recently configured vpn clients using netgear vpn client software. When the clients connect to the VPN the tunnel between Office A and B is dropped.    The client that is connected via the vpn software can open the tunnel but cant access any of the network resources.  If the 325 is rebooted the connection is restored between office A and B.     Cisco is updated with latest firmware on both units.
I am not an expert in Cisco. I am just configuring VLAN in my network.
I have create 2 more VLANs other than native VLAN. VLAN 9 with IP, VLAN 10 with IP and VLAN1(default) with
Now VLAN9 can reach  VLAN10 and  VLAN10 can reach VLAN9. But VLAN9 and 10 cannot reach VLAN1 IPS. Now I would like to have communication between all these VLANs.
I would like to route all traffics to Fortinet firewall except internal IP traffic. Attached configuration.
Is there anyone who can guide me how to have inter VLAN communication as per best practice?
I am looking for an easy way to verify that the PC where my program is running is connected to the Internet.
The program is mine and coded in Delphi XE
Hello Experts,

I had a basic requirement of having a AD to authenticate users, block a few websites (whatsapp,Facebook and Youtube). The sites had to be available only for HR and Management teams and were to be blocked for everyone else.
This was outsourced to a thirdparty vendor to get this up and running in about 5 days.

However the vendor informed me that the requested setup is complete in about 5 hours.
What he has done are the following
** ubuntu server installed serving as a DC and AD authentication server.
** pfSense firewall installed but this is currently down due to the OS blowing away after power failure.
** certificate that was generated to ensure internet only works when the certificate is installed.

Now the issue is with the websites blocked. All users are currently being blocked from using these sites. Facebook, WhatsApp and other Social media like twitter are a requirement for HR and Management operations.

The setup is incomplete and the vendor is absconding after payment.
Since I am knowledgeable about Linux OS and familiar with CLI, I need to make sure the required setup is up and running.

Kindly point me to the right KBs or Update me on the steps that I need to take to ensure this is completed.
Why I can only get a complete traceroute on my PC to the remote server and not from my access switch to the server. I can ping without any problem.

traceroute from my PC at the main site to the remote server via MPLS:

Tracing route to over a maximum of 30 hops

  1     2 ms     2 ms     2 ms
  2    <1 ms    <1 ms    <1 ms
  3    <1 ms    <1 ms    <1 ms
  4    20 ms    15 ms    19 ms
  5    15 ms    15 ms    15 ms
  6    39 ms    36 ms    32 ms

traceroute from my L3 switch at the main site to the remote server via MPLS:

L3-sw# traceroute
traceroute to (, 30 hops max, 40 byte packets
 1 (  0.789 ms  0.793 ms  0.65 ms
 2 (  5.014 ms  5.063 ms  11.98 ms
 3 (  21.506 ms  15.497 ms  15.627 ms
 4  * * *
 5  * * *
 6  * * *
 7  * * *
We are trying to ensure the company has controlled use of admin permissions. Aside from the obvious 'domain admins' and 'enterprise admins' in AD are there any other admin rights you would suggest to focus upon in a network primarily comprised of microsoft OS and server apps.






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.