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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Name of Windows 10 background service needed for file sharing network?

I am trying to think of the name of the Window 10 background service which needs to be activated for Windows 10 file sharing to take place. It's not "Computer Browser" service btw. It's another service on Windows 10 which to my knowledge is not enabled by default. Assuming you have all other settings for file sharing configured, enabling this service magically shows all other computers on the network*. But what is the name of this service?

(I am referring here to a Workgroup network and NOT a Domain network)
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I have a Netgear Nighthawk Router and I am trying to block a specific port, 42443.  The issue is the port still shows open after I blocked it at the router.

  1. Clicked on Advanced tab
  2. Then Security tab -> Blocked Services
  3. Used below settings and rebooted router:
    • Protocol: TCP/UDP
    • Starting Port:      42443
    • Ending Port:      42443

The port is still open. I can go to https://xxx:xxx:x:xxx:42443 and get to a page, 404 not found. When I surf to http the browser reports ERR_EMPTY_RESPONSE.  When I go to http://www.canyouseeme.org/ and add my ip and the port, it shows it is open.

I have a comcast router that is in bridge mode that connects to a Netgear Nighthawk r7000 router where I added the block. There is a Cisco SG 300-28P 28-Port Gigabit PoE Managed Switch attached to the router but from what I can see, it is basically being used as an unmanaged switch. Attached to the switch are VOIP phones, ubiquiti AP's, computers and multi function devices.  

How can I detect what on the network is using port 42443?  Am I missing something in trying to block that port on the router?
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hi all,

is this possible.

network 1 - 10.3.3.0
network 2 - 192.168.50.0

they are connected via VPN. all traffic is flowing nicely apart from the phones.

the client has bought a VoIP phone system which needs to be on the same subnet, is it possible to 'trick' the 192 network to have a 1x 10.3.3.0 IP address on its network so that the phones can talk back to the phone system? And then to have the routing on the routers to move the traffic correctly.

Thanks
Gareth
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We are looking to setup a few cache servers and aren't sure what OS would be best. Our network at present is mainly Windows 2012 r2 and a few 2008 r2 servers. We would like to use use the newest OS we can, as these are purchased through a special program that allows us a discount, but we haven't used 2019 and don't know if this would cause any issues with the older OS we have in use now. Any advice would be most appreciated.

Regards,
ABBEadmin
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Loop Guard and Root Guard on Cisco Switches

I have done some reading about Loop Guard and Root Guard

Loop guard is configured on Non Designated Ports , which means Blocked ports and Root Ports

Root Guard is configured on Designated Ports.

 Well, I believe this is needed just  in a redundant L2 Links Network. in this case , do we have to go to each Non Designated Ports in the Network and configure Loop Guard and to each Designated Port and configure Root Guard ?


I am assuming in the Network that has no Layer 2 redundant links this is not needed at all, except on the Access ports where we need to configure Port Fast and BPDU Guards.

Any Expert to shade some lights on this topic?

Thanks
0
I'm running a shared Microsoft Access DB from the N:\ drive and within 5 or so minutes the DB disconnects and I receive (Network access interrupted. To Continue, close the database, and then open it again. This message started since I moving to a  Windows 10 Desktop.
access-error.xlsx
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I was asked to help setup some TVs for a small restaurant. I wouldn't be doing the actual install of the physical TVs but was asked to figure out the best way to control the TVs. There will be 6 TVs spread across the restaurant.

I was asked for a couple things: That each TV be able to play it's own "unique" media and that any number of the TVs could be set to view the same channel/input(ie Channel 200 on a Reciever, or a DVD on a DVD player).

What are the best solutions for something like this? I know that places like Applebees and Buffalo Wild Wings have "sophisticated" racks that they use to control all the channels on all the TVs from, but for something this scale I don't think it needs to be that "sophisticated". I know that some of the newer smart TVs can also receive signal by Ethernet, but we will most likely go with HDMI for this Application.

Thank you for the help!
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Hello ALL,

I have a stored procedure in SQL it's a little twisted with a few sub querys and it has 34 fields, but it’s not returning so many records (about 6500 records).
When I execute it in sql it takes a second but when I execute it from Access thru a passthru query it could take about 15 seconds
Do you have any idea why and what can be done?

it's a dedicated network server.
On a local sigle computer it's running fine.
Thanks
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We have split our domain locations into different subnets after relocating our servers to a colocation site
Head office 192.168.53.n
COLOCATION 192.168.0.n

The colocation site has a domain controller with no DHCP IE:DC01
The london subnet has a domain controller DC with DHCP IE:DC02

Logging on in London is fine & picks up domain shares etc no problem, but when browsing the network it is only picking up the local subnet not the whole domain.
From London, we cannot browse by name only ip address
our SQL server apps which rely on domain authentication cannot find the SQL server, but if we amend the connection string to the IP address we get the error that the login is from an untrusted domain & cannotbe used with windows authentication.
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What is the difference between the Cisco Aironet AIR-CAP3602I-E-K9 Access Point   and the CAP3602I-A-K9 Access point.

The difference being the E vs the A.

Is it possible to convert a A to a E? or vice versa. Thank you.
0
Email is being blocked/rejected for spam-like characters by certain domains. I have a client that recently upgraded their internet connection. Initially, we had some issues sending emails until the ISP made a change to their router. It is two months later and we are having issues sending to several customers & vendors. The email is being returned as undeliverable...550 5.7.1 wBSFYaaE027426 This message has been blocked for containing SPAM-like characteristics. I have contacted our ISP and the customer. We are unable to resolve the problem. Our email is hosted off-site. We are using Outlook2010/2013 and pulling down email as POP. Outgoing is setup with SSL/465 and authenticated with user and pswd. Not sure why, but when I look at the headers, the sender listed is NOT the actual sender.
     X-Spam-Flag: NO
     X-Authenticated-User:
     X-POP-User: XXX@MyDomain.com
     X-Envelope-From: MAILER-DAEMON
Also, If I log into the WEBMAIL console within my browser, I can send the email without an issue. If a user connects to a different network and opens his Outlook, he can send to these customers without a delivery failure. Our users work from a custom SQL program for our main business function. The program links to OUTLOOK for sending out notifications. This is why we need to get this resolved. … We also send emails to cell phones (received as a text)... When we send to Sprint, Verizon or Boost users, the texts never get to the recipient. AGAIN, if we use a web-based email …
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BPDU Guard Role

If I understand BPDU Guard is configured on Edge Ports along with Portfast.
Reading this Cisco artcile:
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/SpanningEnhanced.html
It does not say the Portfast has to be configured for BPDU Guard to have effect.

It also states:
you can configure BPDU Guard at the interface level regardless of the typ of the configuration.. what I understand from that, you can even configure it if the interface is a Trunk.

Any Expert to shade some lights on this topic?

Thank you
0
Spanning Tree Network Ports vs Normal Ports

In Cisco link :https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/SpanningEnhanced.html
it talks about Network Ports and Normal Ports.
To me both sounds like Trunk Ports.

Any clarifications on that ?

Thank you
0
Hello looking for some experts to provide some feedback on an odd issue I'm trying to pin down.

Laptop - on board Verizon SIM - VPN SW Client back to office* - Able to ping resource on local office LAN by IP and Name and also 182.13.x.x traffic by IP and Name
*Note: Also a vendor specific router off in-office firewall interface that certain and all 182.13.x.x data gets routed to/through.

Connection via on board SIM connection - CANNOT resolve a https:\\listenerpage.domain.com site.
Connection via Hot-spot on cell phone - CAN
Connection via a external Verizon Jet-pack newer or older model - CAN
Connection via hard wire/LAN connection within the LAN - CAN

Tested on two different same manufacturer Laptops, Panasonic, and same behavior (success vs unsuccessful HTTPS address resolution) outlined above.

Packet Monitoring shows drop on successful HTTPS resolution attempt but nothing really that can denote why other than its not getting a response back it seems.  Wire-shark shows packets can be no bigger than 1378 when being transmitted, but it's same when successful using another method to get out to internet by Verizon.  Of course all vendor support says 'not them'.

Any thoughts on what else to look at consider, angles to approach would be greatly appreciated.
0
I have an Access app, with a split back end, which needs to be multi-user (max 5 users) in a  local office. I believe the BE file needs to be stored on a server, but I am not sure of the exact steps to implement this. Specifically:

  • Do I need a separate computer (the server), with a specific version of Windows?
  • Should there be a LAN in the office? Wireless or hard-wired?
  • Are there minimum specs for the server computer?
  • What version of Windows should be used on the server?
  • Are there limitations for the user computers?
0
Dears,

Good Day,

Outlook 2019 Keeps Prompting For Credentials (Username and Password) for exchange 2013 while connecting out of network (anywhere connection) but its connected to Microsoft exchange server but keep asking password....

Thanks
0
How can I configure Windows 7 to forget a Wi-Fi password.
The Wi-Fi connect is open, so in other words, all I need to do to connect to the Wi-Fi is enter the user and password at the website.
Things tried: Disconnected from the Wi-Fi
Remove the Wi-Fi via Network and Sharing Center
Created a new local account
Uninstall the Wi-Fi drivers

It look like the Intel software remembered the Wi-Fi, I disconnected from the Wi-Fi via the Intel software, but no change.
There is a nets command, for I will have to look up my pass notes.
i will look at Credentials manager next, I am confident that the settings are in there, but that does not explain why the laptop still connect to the Wi-Fi on a different account, not unless the Intel software keeps the Wi-Fi login details for all profiles.

Any suggestions?
0
Able to connect to a network resource okay when on Wi-Fi, but when connected to Ethernet, File Explorer hangs.

I suspect that the problem is the Ethernet connection speed, for instance, since the computer gets it Ethernet connection via a VOIP phone, which only gives the computer 10 Mbps.
The computer was replaced with a faster model.
Windows Updates were installed.
Reliability history shows the every time the File Explorer stopped responding.
My thinking is problem could be on the server itself, maybe I need to enable SMB on the system.
What else should I be looking at?
0
I have an HPE S5500 which is for my main core switch. This is newly configured. I am having a hard time to ping one VLAN interface to another VLAN interface. I have default VLAN 1 interface setup with 10.10.10.1 and other VLAN 2 interfaces 10.10.12.1. Within switch, I can't ping each other. What is missing? Does this switch has enable routing command or something? I can't find any reference to enable if there is one.
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My contractor ran fiber cables between floors.  Today I noticed there's an interesting transition connection from thicker cable to the thinner one.  Taped over with while electrical tape.
I didn't have that fiber patch panel.  They install it all.  Taped like that on both end of terminations.

  Does anyone know if this is how its done normally and should I worry about it?  Thanks.
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20181226_121022.jpg
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Meaning of TTL in PING Reply

I have pingged 2 devices that have the same number of Hops away.
One shows TTL:124
the other shows TTL:250

I wonder how is the TTL calculated in this case .

Thank you
0
eth

How L2/L3 Etherchannel does Load-Balancing

Considering the diagram above ,  assuming that there are many PCs in 192.168.1.0/24 network and many PCs in 192.168.2.0/24 network
What is the best method to choose for load-balancing in this case (Source-Destination IP, Source Destination Mac,etc....) ?

another case is , Let's say in network 192.168.2.0/24 there are separate servers  that procide services to  PCs in the network 192.168.1.0/24
in this case what would be the best Load-Balancing Method ?

Thank you
0
With version 1803 once access is granted via the FortiClient Console, I can log on to any workstation with remote desktop from my computer remote from the site.  I updated a couple of workstations to 1809, but I cannot log on with remote desktop.  

When I check the event viewer I get several "Profile notification of event Load for component {B31118B2-1F49-48E5-B6F5-BC21CAEC56FB} failed, error code is See Tracelogging for error details.

Event ID 1534"
Some research has indicated that this is quite a common occurrence, and does not seem to be impacting performance.  Are there any solutios available that would allow remote desktop connections?  I can log onto the server and then remote desktop to each workstation from "inside" the network.
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Is it possible to copy the IOS and license from one cisco switch to another? I want to replace a failed 3750 switch in my stack with another 3750 but the switch IOS and license are not the same. The switch is end of life and there is no support or stock.
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Is there a way to network a Dymo printer?
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Networking

95K

Solutions

68K

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.