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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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I would like some parental control software that will limit the amount of time that a user spends on games (especially Fortnite) and TV.  I need software that does not allow some games to slip through the net. I would also like to be able to view the computer screens on out network without the users being aware. Maybe that could be achieved with a remote access software but the ones that I have used have always notified the user of the remote PC that their PC is being viewed.
Which software would be the best? Which software would achieve these minimum requirements for the least amount of money?
Thank you
0
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I'm going for network engineer/security engineer position with a local company and part of the job is creating secure architecture diagrams, which I don't any experience with and need much information regarding this topic.  

I'd like to know what tools are available, both paid and non-paid, utilities.  Also, where can I get a crash course on this subject and maybe some type of hands-on soonest?  The meat of the position is identifying threats and mitigations, but I would like the position and again, I'm weak on documention skills.
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I had this question after viewing Citrix profile management issue.

HI

i still need more info to under stand

1- Exclusion List - directories and files  in Citrix profile management

if i decied to exclude this list that mean this folders will be saved on the xenapp server local disk

and my xenapp server  disk less because it boot over network from PVS server  so the all Vdisk actual will use Xenapp memory

my question if i want to configure Exclusion List - directories and files so maybe i have to create for every work a local disk to use as a store for all of these excluded directories

so how can i tell this inside citrix UPM policy on Citrix director  

i really don't want the excluded directories to be loaded on drive C where it is coming over network from PVS server  

anybody here can tell me how this work why Citrix recommended this (( we have 10 G Ethernet so keep  the whol profile on the network share should make scene ))

the same question for  

Directories and files to synchronize

to synchronize to where ?

the same question for

Folders to mirror       mirror to where

sorry if anyone has any link will show the configuration for such configuration step by step or good links to explain this to me

i am using only citrix UPM on a shared file system and i know nothing about configuring

Exclusion List - directories      and files

Directories and files to synchronize

Folders to mirror  

thanks in advance
0
hi i would like to achieve the 2 followings:

(1) how can i set up a system in place where i can track which device or computer or.mobile uses the highest internet usage?

(2) and lastly i would like to assign each device on our network specific volume of data for internet usage. for example one device can have 500mb per month?

please can someone advice?
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Challenge: How to determine if a network issue caused a Polycom Trio phone to not dial out?
To get the phone to work again, I unplugged an re-inserted the network cable.
Would it be possible that the switch port  is not generating enough power?
Or the switch itself that is powering the phone has an issue?
Maybe the Polycom Trio phone needed more power than what the switch is providing.

I did not run diagnostics on the phone, nor do I remember the phone's model.
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Good evening Experts,
I recently installed a server 2012 R2 Active Directory Domain at home ( test environment) , however, I am not able to join the domain with any of my test machines. I will summarize with screen shots and descriptions the steps I took to configure the domain and then make it ready for joining.

First here is a screen-shot of the domain and DNS:
!
Screen-shot of the system  information:
!
I am able to create accounts. users, groups, ou's and all the other features of a domain except joining. I will now show you a screen-shot of the DC's ip scheme.

!
I was able to join one of my machines to the domain:
!
Here is the ip setup of both the working machine and the non working machine.

!
 this is what happens when I try to join the domain from the other computer:
!
!
!
!
!
Note: This information is intended for a network administrator.  If you are not your network's administrator, notify the administrator that you received this information, which has been recorded in the file C:\Windows\debug\dcdiag.txt.

DNS was successfully queried for the service location (SRV) resource record used to locate a domain controller for domain "CURETON.DENTAL.COM":

The query was for the SRV record for
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There are 6 computers in our network.  Five of them run Windows 7 pro and 1 runs Windows home premium.
They are all in a peer to peer network

All of them are running Virtualbox .  The guest operating system on all of them is Windows 2000.  

The Windows 2000 is needed to run software called MD Dictate.  It is old software.  

Five of the computers connect just fine to the MD Dictate software.  The home premium computer does not.


I keep getting the error “The list of servers for this workgroup is not currently available” only on the Windows home premium computer.

The database for the MD Dictate software is SQL server 2000.  This resides on one of the Windows 7 computers .  We call it the “server” computer.  The SQL server 2000 is running in Windows 2000 in Virtualbox on this “server” computer.

In order for a computer to be able to run MD Dictate , it must connect to \\mdserver .  

What I have done so far:
- I made sure the workgroup name is the same in the Windows 7 and Windows 2000 operating systems.
- There is no DHCP server.  All the computers have static ip addresses.  I made sure all of them were unique.  All are on the same subnet (192.168.1 etc and 255.255.255.0)
- I executed net view on all the computers and all the computers names appear.
- I can successfully ping from Windows 7 Home premium computer (let’s call it W7H) to the “server” computer.
 - Netbios over tcp/ip is set for all the computers.

When I start Windows explorer on the W7H …
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Unable to Login to the Domain Problems....  
We have a bout 750 computer on the WAN and 200 LAN.  We get random users that say they cant login.  Error usually says, The Group Policy Client failed the sign in.  Access is denied.  
1. I login as local admin and get error in popup in the lower right, Windows could'nt connect to the System Event Notification Service Service.  
2. I try gpresult /r and get user does not have RSoP data.
I have found many people with a simular issue and found several different fixes.  These fixes only work for the time but usually come back..  I have used all of these fixes individually.  They all seem to work but have not found the root cause to cause the machines to come back with the error logging in.  
CMD: \>NETSH WINSOCK RESET = Worked, then came back
Removed and added back to domain = Worked, then came back
PowerShell: Reset-ComputerMachinePassword = Worked, then came back
Removed ipv6 – Fixed. Added IPV6 (Waiting to see if it will return)
A few have rebooted and it started working.[/indent]

Thanks for any help.  
Ken
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What is the command line to map a network drive to an Office 365 SharePoint documents folder?
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Hi, i have 4 Cisco APs (AIR-AP1261N-A-K9)
currently connected to 100mb switch port (configured as trunk)
i was hoping to get better performance by moving the APs to a gb port.

two issues:

(1)      when i connect this AP to a 1gb switch port, i don't get a link light

      i've tried replacing network cables, new PoE adaptor. no luck.  connecting to any 100mb port and i see
      a link light making me think it's a speed issue.  the AP's single ethernet port is Gb:

      interface GigabitEthernet0
       no ip address
       no ip route-cache
       duplex auto
       speed auto
       no keepalive

(2)      the other issue is the performance when accessing the network via these APs is terrible.
      when i carry out iperf3 end to end tests, i see bw figures like:  6.12, 4.21, 10.5, 7.77 Mbits/sec

      for reference when doing iperf3 tests using direct wired to a 1gb port i see average bw
      of 932 Mbits/sec and on a 100mb port switch, i see 93.8 Mbits/sec.  all relatively normal.

are these APs even capable of better throughput?
0
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Is there software that tests noise on CAT5e and CAT6  cabling? I hired a company to test the cables and they said everything is above 1G and for the most part I believe them as I witnessed them test drops and make repairs on several damaged jacks. My concern is they didn't include a report with their invoice. Extremely disappointed as I mentioned the report was imperative for us to decide if VOIP is an option for my client.

I've insisted they put a report together and I'm aware the Fluke they used provides the one needed. While waiting on the report, and my suspicion is they forgot to turn reporting on, is there any software available that can give an indication of noise or how well VOIP will work on my clients network. Everything tested above 1G but there are still concerns I would like to eliminate. One being noise.

I've tried Solorwinds and wasn't impressed. Any other options available?
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Hi Expert,

I have issue in DR and BDR, despite reading up and watching some video still couldn't get it.

I need help on the following.

Photo-14-12-18--7-16-18-PM.jpg
Appreciate if can help explain a bit.

Thanks!
0
Trying to get VRF forwarding on an interface in Cisco IOS 15.4.  We currently have a router with 15.2 and have no trouble with it:

interface FastEthernet0/0/3
 switchport access vlan 3
 ip vrf forwarding INTERNAL
 no ip address


But when I try to configure this on the 15.4 router, I get an error:

Test(config)#int f0/1/3
Test(config-if)#ip vrf forwarding INTERNAL
                   ^
% Invalid input detected at '^' marker.

Test(config-if)#


IP vrf isn't an option:
Test(config-if)#ip ?
Interface IP configuration subcommands:
  address     Set the IP address of an interface
  admission   Apply Network Admission Control
  auth-proxy  Apply authentication proxy
  ddns        Configure dynamic DNS
  device      IP device tracking
  dhcp        Configure DHCP parameters for this interface
  igmp        IGMP interface commands
  rsvp        RSVP Interface Commands

Test(config-if)#ip



I do have vrf configured in the global:

ip vrf INTERNAL
 description Trusted Network
 rd xxxxx:10
!
ip vrf INTERNET
 description Internet Traffic
 rd xxxxx:20
 inter-as-hybrid


Any ideas what I'm missing here?
0
Cannot connect to ipmi on a dell poweredge t620.
IPMI over LAN is enabled.
I can nmap the port and it's listening.

when I try to run a command against it I get the following:
C:\Program Files (x86)\Dell\SysMgt\bmc>ipmitool.exe -I lanplus -H 192.168.101.4 -U root -P password sdr elist all
Error: Unable to establish IPMI v2 / RMCP+ session
Get Device ID command failed
Unable to open SDR for reading

Funny thing is, I can get this to work:
C:\Program Files (x86)\Dell\SysMgt\bmc>ipmish -ip 192.168.101.5 -u root -p password -k 1234512345 sysinfo
DeviceID        : 32
DeviceRevision  : 1
FirmwareVersion : 2.61
IpmiVersion     : 2.0
ManufacturerID  : 674
ProductID       : 256
Status          : No error
SDRVersion      : 1.5
Guid            : 315xxxx-C0C4-xxx-4C10-00544C4C45xx
0
Hi Expert,

I am new to networking and I need help on the below question.

If a router has routing table entries from 2 or more routing protocol (for example, RIP, EIGRP, OSPF), and each entry presents a possible but different path to the same destination network, what is used to determine the"most trusted" path for the router to choose, from among the routing protocols?

Appreciate if any expert can explain on the answer.

Thanks!
0
We create VMs with the latest build of our code on. One VM has a weird ASYNC_NETWORK_IO error when running a SQL SELECT statement. It isn't on any other VM.

I have tried googling for the error - clearly something failed to start or get set when this VM was created.

Just for peace of mind it would be really useful to know what might be the cause of this and if there is some setting I can adjust to fix it.

The symptom is that a SQL SELECT statement just seems to time out with this ASYNC_NETWORK_IO error, but the strange thing is that it must have somehow returned some results because it then blocks an INSERT statement that has used the results of the SELECT statement.

Everything necessary for the application is on the VM - the ASP.NET application and the SQL Server database so there is no actual network access outside of the VM.

There is no antivirus running on the VM either which is one possibly cause I came across.

The server is Windows Server 2016 and the SQL Server is 2016 also.

I've attached a picture of what is happening.

Just to repeat this doesn't occur on any other VMs with the same software on.

I have tried restarting IIS and restarting the VM.

The VM is Hyper-V.

ASYNC_NETWORK_IO error
0
Hi Expert,

I am new to networking and I need help on the below question.

Appreciate if any expert can explain on the answer.

Photo-14-12-18--7-08-41-PM.jpg
Thanks!
Photo-14-12-18--1-46-03-PM.jpg
0
Was troubleshooting a network scanning to desktop problem (since solved) when I noticed Network Discovery was turned off on the client's 2012 R2 server. This server is the DC in a single server environment. It's also virtualized. I thought that was strange, and at the time didn't know if that's what was causing the problem. I attempted to turn Network Discovery to no avail. Several of the services mentioned in the following link were disabled, so I turned them enabled and started them. Thereafter Network Discovery was on.

https://support.microsoft.com/en-us/help/2722035/you-cannot-turn-on-network-discovery-in-network-and-sharing-center-in 
I enabled, set to automatic and started the following services:
Function Discovery Resource Publication
SSDP Discovery
UPnP Device Host

I checked the Network Discovery setting on a couple of other clients' servers, both DCs. Network Discovery on a similarly virtualized 2012 R2 server was on, and was off on a non-virtualized 2012 R2 server.

Both networks that had/have Network Discovery turned off have had zero problems.

Ultimately the scanning problem had nothing at all to do with the server's Network Discovery setting. I've left Network Discovery on for the time being, but wonder a) why were those services off,  b) is there any harm in leaving it on, and c) should Network Discovery be on at all?

??????????

Thanks
Mark
0
Hello Experts,

We have Dell R610 servers in our network, last few days i am getting unexpected server reboot issue, i try to find issue but unable to find out.
please help me out i am attaching 2 servers log files.

OS - Windows Server 2008 R2 Stranded SP1
121418-13478-01.dmp
121418-16426-01.dmp
0
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My company has a new vendor who wants to make a library of files available via a mapped network drive.  
I'm familiar with doing that for our local server, but I'm having trouble making that work well with this remote location.
If I map K: to https://CompanyName-1234567890.RemoteVendor.com/files I am prompted for username and password the first time.  I have checked the "remember password" box and save the mapping.
It works, but has two bad characteristics...
1. Whenever the user restarts or logs off and back on, they are prompted for the credentials again before they can use the mapped drive.  
2. Users are again prompted for credentials every time they open a file from this remote library.

I've added the location to the Trust Manager Locations in each Office app, but that seems to have no effect.
Is there a way to make this remote mapped drive accessible without having to give users credentials (that I dont want them to have) that they have to use all day long to access this library.
I know there are better ways to connect to this remote library (VPN would be nice!) but this vendor does not make that available.
Any suggestions are appreciated.
0
Slow Performance while VPN to the network.

Does anyone know why VPN performance is so slow when running speedtest (80MB directly to the internet and only 10MB while through VPN).  There is no split tunneling enabled so all internet traffic goes through the VPN tunnel.

Thank you in advance,
0
We have ESXi 6.0 hosts with vCenter appliance version 6.7. Needed to move vCenter and ESXi hosts to a new IP subnet. Changed IP address of vCenter a few weeks ago without a problem.

Yesterday, after putting an ESXi host in Maintenance mode, I changed its management IP and after hours of troubleshooting, the ESXi started responding on new IP, with old name. (There is redundancy in links.) However we cannot reconnect this ESXi host back to vCenter now.

This host and vCenter are on the same subnet. (They can ping each other.)  I have restarted management service of host a few times. Have also rebooted host and vCenter. Still get the same error: "Cannot contact the <> host (10.0.xx.xx). The host may not be available on the network, a network configuration problem may exist, or the management services on this host may not be responding."
Please advise. Thanks.
1
e have our BDR backup create hyper-v images of the hyper-v servers at a DR site using Solwarwinds Backup. Last year, we performed a test using these servers in an internal network successfully. This year, when we went to test it, we began having random issues with the network adapter not installing on servers. On any given day, either one of the 6 servers (mixture of 2008 R2 and 2012 R2) will not find a network adapter. We have tried using the legacy adapter for the Server 2008 boxes, but I have even seen this on the Server 2012 boxes. I have tried both an internal network switch, and a private network switch. If I try to add an adapter to the server via powershell, it seems to go through, and If I do the "Get-VMNetworkAdapter -VName" command, it shows the adapters attached to the machine, and if they are connected to one of the switches. I cannot figure out what is going on.
0
we have setup our domain same as our website domain mazcol dot om and our domain is mazcol dot om now whenever we try to access the website from the internal network but we it does not open what is the best practice a technical person says  to create a static hosting and redirect but that involve changing my host  or I should change our domain controller name internally what is the solution
0
I have a mixed network with windows 7 and windows 10 PCs.  I have two DCs that are 2008R2 and 2016.  All of a sudden back in Oct random computers will get the message that the trust relationship has been broken with the DC.  If we wait 15-30 mins and try to log in again it will work.  
I have cleaned up AD with regards to an old DC and cleaned up a few old IPs in DNS etc.  That didn't seem to work.  I have the logs for an offending PC.  One event that stuck out was an event ID 3210.  Just wanted to see if any one had any ideas as to this error?  I have also verfied DHCP dns settings and they are pointing to the correct DC etc.
trusterror.png
0

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.