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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Windows 2012 R2 Data Center NLB IIS URL Rewrite
Windows 2012 R2 Data Center Web Farm IIS
Meraki MX 60

I have two public facing web sites mymusic.com mysports.com using port 80

internally I can access both sites using the virtual ip address 10.10.10.171 of the NLB servers

On my Meraki I changed the firewall port forwarding rules protocol TCP  public port 80 Lan IP 10.10.10.171  local port 80

I am unable to browse the site externally using the NLB virtual ip address

If in my meraki I change to the physical ip address of one of the Web Servers in the farm that works.

I did a netstat -a and port 80 is listening o both the NLB servers and the Web Farm Servers

could it be the URL rewrite rule ?

Any ideas?

thank you

Tom
0
Python 3 Fundamentals
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Python 3 Fundamentals

This course will teach participants about installing and configuring Python, syntax, importing, statements, types, strings, booleans, files, lists, tuples, comprehensions, functions, and classes.

Hello we operate in a closed loop network, the only way to transfer files\data is to use a USB device or a CD\DVD.  With this being said we must scan any USB device that connects to external device\network before re introducing it back onto our closed loop network.  I've got to download several items a day, updates and such, place them on USB device scan then copy to our closed loop network this has gotten to take up a lot of time.  My question is are there any other alternative methods that wouldn't require a scan each time?
0
All of a sudden, when I type a local IP address in MS Edge address windows, it wipes it out and does not go to the site.
It does not return an error code, just stays on the current page and the IP address disappears from the address bar.

I have tried to reset the browser settings, delete all history.  The same browser works OK on anther computer in the same network.

Also, it behaves that way when it is hard wired to the network.  When I switch to WiFi it works OK.  The WiFi network assign a different IP address (different subnet)
LAN is 20.0.0.X  Wifi is: 20.0.50.X

MS Internet Explorer and Chrome are working OK.
0
what is the difference between state full inspection and deep packet inspection ?


thanks !!!
0
How should spanning tree be designed?

I have a wireless controller that is essentially a switch and that is connected to a core switch.  The port, from the wireless controller is set with spanning tree turned on.  The core switch is using Spanning tree )(2 fiber connections on each switch uplink port.

I want to use another port on the same wireless controller that will be connecting to other switches.  Should I disable spanning tree on the other ports or not?  If these other ports on the wireless controller have spanning tree disabled will that cause any loop?


I have never worked with spanning tree before and I am not sure what I should do?  But I do not want to bring the network down.  Again Spanning tree I enabled on the core switch ports that will connect to the wireless controller.  Should I have spanning tree enabled on the wireless controller ports or will disabling spanning tree on the wireless controller bring the network down?

One may reference:  https://www.experts-exchange.com/questions/29122858/Why-did-a-Spanning-Tree-enabled-switch-port-bring-another-switch-off-line.html?headerLink=workspace_answered_questions
0
Looking at any WiFi controller Aruba Cisco etc

Requirement is for guest WiFi users to be set to a password that doesn’t change

Are there guest access ways of doing this on controllers so that users have no access to the main network

I was looking at static IPs or even a separate scope with 10 addresses (required for 5-10 VIPs) what’s best way to do this? (In general with modern WiFi controllers examples and 2012 Domain controller setup)
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We have a very small two station network.  Two workstations are being used to share data.  The layout is as follows:

Computer1 is a Windows 7 Pro workstation.  This is the workstation where the shared folder is located.  The folder "Data" on the desktop of computer 1 was shared on the workgroup and given full access rights.

Computer2 is a windows 10 pro workstation.  This workstation connects to Computer1's data folder to store and retrieve data.

Up until two days ago, everything was working fine.  Today however, the user on Computer2 reports that the share that was setup to Computer1 no longer works.  The user gets error 0x80070035 when trying to open the share.  We researched the error and found a few documented solutions change some parameters in the secpol.msc app and such but it is still not functioning.  If we setup a share on computer2 and then try to access it from computer1, it works fine.  The other way it fails.  We also get the error "Invalid Handle"  We also researched that error and applied several "Fixes" but still no joy.  We are stumped at this point and ask if anyone has any siminlar issues and the fixes for them.
0
I have a guest network that was setup kinda odd (not by me).
The management part of this network is on VLAN99 and runs in the 192.168.1.x address space.
This address space includes all the switches, access points, access point controllers and one management PC.

The guest part of this network is on VLAN100 and runs in the 192.168.111.x address space.
The Cisco WLC controller gives out DHCP addresses in the 192.168.111.x space and uses the gateway address of 192.168.111.1, which is a Sonicwall firewall (which is managed by Spectrum business solutions... don't ask).

If you login to the management PC you can manage the WLC and all the switches just fine.
However, because you are on VLAN99 and in the 192.168.1.x address space you cannot get to the internet.

If you login tot he WIFI you cannot manage any hardware but you can get to the internet.

This IS how it is supposed to work.

However, I would like to monitor the firewall, via SNMP, from my management PC on the 192.168.1.x network.

I have assigned a 192.168.111.x address to the PC as it's main address.
I have assigned VLAN100 as an additional VLAN on the port that it's plugged into.
But, it does not work.

The switch that I'm plugged into is a Cisco SG300-10SPF

The port I'm using is configured as:
interface gigabitethernet8
 description "Management PC Link"
 switchport trunk allowed vlan add 100

Open in new window


On the 3650 line of switches that would allow VLAN99 (the default VLAN on the switch) and VLAN100 to use port 8.
On this switch... it just doesn't work.

I'm open to ideas.
0
Our network consists of six Windows 2008 R2 servers.  We have implemented redirected profiles using a group policy.  This works on four of the six servers - when I logon to the four on which it works, my full profile is available and works.  On the other two, however, I'm able to logon using my network credentials, but they fail to load the correct profile.  Does someone know what might be going on and what we may have done incorrectly?
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Hi guys

I have an HP network 1820-48G J9981A switch. We have a 192.168.10.0/24 network range on this switch. It has been set with a 192.168.10.10 IP. Prior to this, our network switch was completely vanilla and had no IP configurations.

Now, majority of appliances plugged into this network are on the 192.168.10.0/24 range. However, we have 7-8 devices set to 192.168.9.0/24 range. So now, we are completely unable to get to anything on the 192.168.9.0/24 IP's, as the switch is currently only seeing the 192.168.10.0/24.

My question is, what's the best way now to configure this switch? I don't want to reset it to factory default as we won't have any management. So do I set up VLAN's on all ports? How would you do it?

Or, can I set routing on the switch to say anything on 192.168.9.0/24 network needs to be forwarded on to the 192.168.10.0 gateway?


Thanks for helping
Yash
0
Big Business Goals? Which KPIs Will Help You
Big Business Goals? Which KPIs Will Help You

The most successful MSPs rely on metrics – known as key performance indicators (KPIs) – for making informed decisions that help their businesses thrive, rather than just survive. This eBook provides an overview of the most important KPIs used by top MSPs.

In a corporate environment where a user has a laptop and it is connected both wired and wirelessly which connection takes precedence and why? Is the way to fix it by setting the metric on the wired lower?
0
Building off of https://www.experts-exchange.com/questions/29131838/Search-CIDR-subnet-ranges-with-powershell.html
I'd like to have a second file with known entries be searched first, then search the CIDR.csv failing a result on the main fields. I'd like to search on the main fields, IP, Host and User
Inventory.csv
IP_Address(s), Hostname, User, Notes
10.1.2.3, Workstation003, Jane Doe, HR Admin
10.10.0.3/1.2.3.4, Workstation001, John Doe, IT Analyst
10.1.2.30, Workstation007, James Bond, Janitor
10.69.69.23, WorkstationNiner, Tommy Boy, Sales
10.10.0.4, Workstation002, John Doe, IT Analyst

Open in new window


In the above, searching based on User "John Doe" should have two results (on two lines)
.\finddetails "John Doe" (maybe switches are needed? Like -i = ip, -h=host, -u=user?)
IP_Address(s), Hostname, User, Notes, Subnet
-------------- -------------- -------------- --------------
10.10.0.3/1.2.3.4, Workstation001, John Doe, IT Analyst (Production, unknown)
10.10.0.4, Workstation002, John Doe, IT Analyst

Open in new window

(Production)
[/code]
./finddetails 10.8.0.9
IP_Address(s), Hostname, User, Notes, Subnet
-------------- -------------- -------------- --------------
10.8.0.9, ???, ???, Telco, 10.8.0.0/24

Open in new window

Something to that effect if that makes sense? If the IP doesn't match anything, then some nice error :)
Let me know if you have questions on the details, thanks!
-rich
1
I am looking to upgrade my router to a router that can handle a higher volume and faster, but the number is confusing me a little.

I currently have a Ubiquiti ER-X and looking at the ERPoe‑5, I compared all the specs [RAM, Storage size, 1518 byte packets] and the ERPoe‑5 is higher or same, except for 64 bytes packets which the EX-R the throughput and pps, same is with the CPU frequency on theses 2 the EX-R is higher [EX-R throughput 957 Mbps pps 1,400,000 and the ERPoe‑5 throughput 490 Mbps pps 730,000, CPU frequency ER-X 880 MHz ERPoe‑5 500 MHz both CPU core count 2]

Please help.
0
I'd like to be able to search for an IP's within CIDR ranges/list, and output the information around that IP's CIDR file.
Very similar to this EE question https://www.experts-exchange.com/questions/29127048/Excel-CIDR-IP-Address-Overlap-Formula-Check-for-CIDR-IP-Address-Overlap.html

This is what I envision...
CIDR.csv
CIDR, Subnet_Name
10.0.0.0/24, Guest Network
10.10.0.0/23, Production
10.8.0.0/22, Telco
10.69.69.0/24, BoomChickaWowWow

Open in new window


.\findip.ps1 10.0.0.22
    Found: 10.0.0.22 - Guest Network 10.0.0.0/24

.\findip.ps1 10.8.0.123, 10.69.69.68, 10.1.2.3
   Found: 10.8.0.123 - Telco 10.8.0.0/22
   Found: 10.69.69.68 - BoomChickaWowWow
   Not Found: 10.1.2.3

FindIp would look inside the cidr.csv and then expand the CIDR's and seqrch for matches within.
1
I have a client with three pcs all running win 7 pro. One pc is acting as a  "server" with multiple shares. This has been working for years.

This morning they came in and when they tried to login directly to the "server" they got a profile error and through them back to the main login screen. At this point the other pcs where able to access the shares without any issues, we just couldn't login directly with the primary (admin prived) account. Other local accounts were able to login. When a secondary account (not admin prived)  logged in I remoted in and every time we tried to run an elevated session (ie command prompt, manage pc) it came back with an invalid path. I ran malwarebytes and it came back clean.

After getting to safemode we were able to login to the primary account and I had them add a secondary account to the local admin group. rebooted. I then able  to remote in the the newly admin added account remotely. I fixed the profile isssue in the reg (deleteted temp prof and removed the .bak) and on the next boot the primary account was fully accessible.

The problem is now none of the other pcs can access the shares. The previous mapped drives come up handle invalid and clicking on the pc give be a network path not found. even tried using the ip address instead of netbois name. same thing happened.

after searching internet tried modifying secpol ntlm levels, didn't help
checked permissions looks good. turned sharing off and on same thing.

any ideas
0
Can't access previously setup network shares.
I've had this network share setup between two Windows 7 machines for a while now. Today with no warning the network shares stopped. No password changes to the profile, no network changes, nothing that should have prompted the issue.
Everytime I access the share I get the same error message whether from the network name or the IP address. I've tried uninstalling AV. Turning on and off password protected file sharing and a few other things.
0
I have a user who when tries to restore a Quickbooks database that is 100M stored on the server over the network takes hours.  When he copies the db from the server to his desktop which takes a few seconds then tries to restore it the process takes less then a min.  I would like to use wireshark to possibly identify the issue.

Questions
  1. Do i need to run Wireshark on his computer or on any computer to see if there are any issues?
  2. What should i be looking for?
  3. Should i attach a capture file or is that not secure?
0
The user has a 3-user network, all on Win7 Pro, One PC is where they share their files, with a computer name of "Server".  Up until today, the two workstations were mapped to the Server PC using this command:

Net Use F: \\server\c  

This has worked fine for years.  But today they can no longer connect.  If I delete the F: drive mapping, and once again do Net Use F: \\Server\c I get this error:

System error 6 has occurred
The handle is invalid

And if I browse to Network, I can see the PC named Server, but if I double click it I get this error:

Windows cannot access SERVER
Check the spelling....etc....
Details: Error code 0x80070033
The network path was not found

Other details:

1) They use Norton security.  I have tried turning off the firewall and antivirus on a workstation and on the server to no avail.

2) I can still do the normal Net Use mapping on the "Server" computer--but not on the other two PCs.

3) I went to do a system restore on the Server PC, but to my surprise Windows said was disabled--so no help there.

Any ideas?  TIA
0
Hi,

This morning I have a problem with network drive on all computer. It said 'Microsoft Windows Network : invalid descriptor' when i click on it. I tried to reconnect with Net use but I have same message with system error 6. I search for it but nothing. My server is Windows 7 pro and was up and running for at least 5 years. Everything seem to be ok on server. Going on Internet work fine on it. I uninstall antivirus on server, repair tcp stack and tried so many thing. No Windows update was made last night.

What I can do to locate the problem and solve it?

Thank you!

Dany
0
Angular Fundamentals
LVL 12
Angular Fundamentals

Learn the fundamentals of Angular 2, a JavaScript framework for developing dynamic single page applications.

We have some PCs on our Windows domain that when they login we get a message about not being able to connect to network drives.  We have desktop icons and custom wallpaper that it grabs from one of the shared network drives but alot of times the icons don't have the correct ico file and the wallpaper is not there.  It appears to happen mostly on the PCs that have SSD drives.  They startup so fast.  I will also mention that these machines are setup to auto login to the domain.  Any know fixes?
0
Hi -

A client has a Windows 7 pc running as a file server on a workgroup, As of this morning, no user can connect to the pc via RUN or network browser. An error message comes up saying :
\\192.168.1.100  the handle is invalid.
Here is what i have done so far:
Changed IP address
Changed Network Name
Switch off Firewall
Switch off AV
Swap network switch and restart it

Ping does get a reply from server
The pc does see other computers and can connect to them .

Any help gratefully received.

Thanks
D
Invalid.PNG
0
Trying to set up Snort for Network Intrusion detection. Its set up & running correctly but does anyone know how to set up Output plugins for it?

I can find the linux set up online but I am running this on a Windows machine
0
I need to separate a bunch of stuff into VLAN's for my ubiquiti based network which I am aware of how to do. But just need to know if the correct way of doing this is to put all networking hardware on its on VLAN.

I only have Ubiquiti gear and they are a USG, Unifi Switches and AP's
0
wifi is dropping on some of my clients, i have a Cisco 2504 COntroller and 1852 AP's

looking through the Syslogs this is the erros showing up
please help


*Dot1x_NW_MsgTask_2: 1x_ptsm.c:544 Max EAPOL-key M1 retransmissions exceeded for client e8:p1:e7:o0:7a:d6

*apfReceiveTask: apf_ms.c:7398 Could not find the mobile e8:p1:e7:o0:7a:d6 in internal database

-cap-controller    Error    NY-WC-2504-01: *Dot1x_NW_MsgTask_6: 1x_ptsm.c:730 Client e8:p1:e7:o0:7a:d6 may be using an incorrect PSK

The syslogs show:
*Dot1x_NW_MsgTask_2: 1x_ptsm.c:544 Max EAPOL-key M1 retransmissions exceeded for client e8:c1:d7:00:7a:2a (Ipad 1)
    NY-WC-2504-01: *Dot1x_NW_MsgTask_2: 1x_ptsm.c:730 Client e8:c1:d7:00:7a:2a may be using an incorrect PSK
    1/8/2019 2:17:45 PM    cisco-capwap-controller    Warning    NY-WC-2504-01: *Dot1x_NW_MsgTask_2: 1x_ptsm.c:544 Max EAPOL-key M1 retransmissions exceeded for client e8:c1:d7:00:7a:2a (ipad 1)
    1/8/2019 2:17:41 PM    cisco-capwap-controller    Warning    NY-WC-2504-01: *Dot1x_NW_MsgTask_2: 1x_ptsm.c:544 Max EAPOL-key M1 retransmissions exceeded for client e8:c1:d7:00:7a:2a (ipad 2)
    1/8/2019 2:17:34 PM    cisco-capwap-controller    Warning   NY-WC-2504-01: *Dot1x_NW_MsgTask_6: 1x_ptsm.c:544 Max EAPOL-key M1 retransmissions exceeded for client e8:c1:d7:00:7a:b6 (ipad 3)
    1/8/2019 2:17:31 PM    cisco-capwap-controller    Warning  NY-WC-2504-01: *Dot1x_NW_MsgTask_2: 1x_ptsm.c:544 Max EAPOL-key M1 retransmissions exceeded for …
0
Hello,

I have an ISERIES and I have a Printronix 7010 printer (matrix) attached to it through a twinax controller. I need to switch this printer from twinax to network.

Could you please help me to the necessary steps to configure this printer to be used over the network instead using a twinax controller?

I really appreciate your help.

Thank you
0

Networking

94K

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.