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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Hi Experts,

This week I got a Panasonic ToughBook CF-33 and switched my ISP from Bell to Rogers.

Over Ethernet, using speed-test.net, download with Bell was 300Mbps, with Rogers is 500Mbps.

Over WiFi, the ToughBoook was 80Mbps and now <20Mbps.  On my iPhone, Rogers is getting 300Mbps.

Why is my ToughBook now  under 20Mbps?

One thing that I noticed now is that with Rogers my router is now Hitron CODA-4582U, and the SSID for 2.4GHz and 5GHz can't be the same, where on  Bell (Cisco) they were. The ToughBook now cannot detect the 5GHz SSID. Does the ToughBook CF-33 not support 5GHz?

To make matters even more interesting, my printer only has WiFi interface, which makes it on a different network because of the mismatched SSIDs

As I am typing this I am wondering should I purchase another Cisco router and make the Hitron only as modem?

Any help will be appreciated.
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I have just purchased a new laptop and set about configuring my email.

It is not joined to a domain, as it will be used externally most of the time.

When I run outlook 2016 (connecting to an exchange 2016 server) it connects to the network then asks what kind of account it is, I choose exchange, but then we get asked for a password.

I already have my current laptop working OK, and just cannot find out where the problem is.

I have run the Microsoft connectivity test and get the following problem reported :-

 
 Attempting the Autodiscover and Exchange ActiveSync test (if requested).
  Autodiscover was successfully tested for Exchange ActiveSync.
 
 Additional Details
 
Test Steps  
 Attempting each method of contacting the Autodiscover service.
  The Autodiscover service was tested successfully.
 
 Additional Details
 
Test Steps
 
 Attempting to test potential Autodiscover URL https://domain.co.uk:443/Autodiscover/Autodiscover.xml 
  Testing of this potential Autodiscover URL failed.
 
 Additional Details
 
 Steps
 
 Attempting to resolve the host name domain.co.uk in DNS.
  The host name couldn't be resolved.
   Tell me more about this issue and how to resolve it
 
 Additional Details
 
Host domain.co.uk couldn't be resolved in DNS InfoNoRecords.

Elapsed Time: 62 ms.  


I have checked all of the urls on our exchange server and as fr as I can see, they are all set correctly, even for autodiscover

Can …
0
Hi All,

I'm calling the code below.  

  using (Stream stream = request.GetRequestStream()) throws an error the first time but when I call authenticate again from within the catch it works.  

Postman using the same variables works first time.  I've engaged the hosting company but trying to determine if there's an issue on my side or a reason why it would fail the first time from my code.

Thanks in advanced for the help.



  private static Authenticate Authenticate(bool secondTry=false)
        {
            string url = Config.URL + "token";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.KeepAlive = false;
            request.Headers.Add("Authorization", "Basic " + Utility.Base64Encode(string.Format("{0}:{1}", Config.ConsumerKey, Config.SecretKey)));
            
            request.Method = "POST";

            //what I'm sending to the web request on a post.
            string postData = "grant_type=STUFF";
            
            Byte[] data = Encoding.UTF8.GetBytes(postData);
            request.ContentLength = data.Length;
            
                        
            // default settings.
            request.Accept = "application/json";
            request.ContentType = "application/x-www-form-urlencoded";

          
            AttachClientCert(ref request);  // Attaches PFX to request
            setTLS();  //set TLS to 1.2 and other ServiceManager configs.

            try
            {
    

Open in new window

0
Dear Wizards, when I run this script (ps1) to get all members from all Distribution Groups of our Exchange 2016 Server (Win2012R2)

$s = New-PSSession -ConfigurationName microsoft.exchange -ConnectionUri http://mail.domain_name.com/powershell;
Import-PSSession $s;

$groupmember = foreach ($i in Get-DistributionGroup) {Get-DistributionGroupMember $i -ResultSize Unlimited | select Name, PrimarySMTPAddress,@{n='GroupName';e={$i.Name}} ,@{n='GroupSMTP';e={$i.PrimarySMTPaddress}} };
$groupmember | Export-Csv C:\_ListGroupmails.csv -NoTypeInformation;

Remove-Variable groupmember;
Remove-PSSession $s;
pause

Open in new window


I got this error

error.PNG
Can you please help and suggest?  Many thanks as always!
1
I have a computer with two nic's installed.
N1 192.168.0.x 255.255.255.0 ; N2 172.18.135.x 255.255.255.0
I would like to route all outlook email traffic from N1 to N2
I have tried a lot of combination of the following "route" command
all with an invalid parameter error message. I'm using the CMD with
elevated admin.  any help would be appreciated.

ROUTE ADD 192.168.0.11 MASK 255.255.255.0 172.18.135.48 yields invalid param error
ROUTE ADD 192.168.0.11 255.255.255.0 172.18.135.48 yields invalid param error
ROUTE ADD 192.168.0.11 MASK 255.255.255.0 GATEWAY 127.0.0.1 172.18.135.48 yields invalid param error
ROUTE ADD 192.168.0.11 MASK 255.255.255.0 127.0.0.1 172.18.135.48 yields invalid param error
0
We have a Windows 2012 R2 RDS server.  For the last 5 days, that box goes through periods of serveral hours where connectivity is very spotty.  RDP sessions won't connect or disconnect after just a few minutes.  Sometimes it won't even ping at all, or pings with very slow response times.  When it's not pinging or pinging slowly, we can't RDP or VNC into the box at all.  We have replaced the NIC, patch cable, switch port, and rebooted the switch it's plugged into.  Nothing helps.  It just gets better on it's own and then breaks on it's own.  Rebooting the server or rebooting the switch will sometimes get it going again, but RDP sessions will continue to disconnect after a few minutes until it just decides to get better.  We even hooked up a second NIC with a seperate IP address, and we get the same results with that NIC.  It affects both our local and VPN clients PCs, which are a mixture of Windows 7 and Windows 8.  I'm lookiing for any ideas here - I'm pulling my hair out.
0
Hi,

I have a Windows 2012 R2 Hyper-V server running 3 VMs.  2 VMs are Server 2012 and the third is Server 2008.  Sometimes, I can't communicate with the Server 2008 from any device on the network.  I cannot ping it (using its STATIC IP--not hostname) or connect to it through RD.  I can ping from the Server 2008 to the other servers.  I just disabled the firewall on the Server 2008 temporarily to take it out of the equation but still not accepting pings.  I tried a tracert to it and nothing as well.  Please let me know how I can diagnose this problem.  I haven't tried restarting either of the VMs because people are working on them.  And, actually, there is one user that's connected to the Server 2008 now so I know that they were able to access it earlier in the day.  Thanks for any suggestions.
0
Hello Experts.
I came across a difficult situation today.

We integrated Aruba ClearPass (A NAC solution) for one of our clients who uses Juniper Switches.
Everything worked perfectly until suddenly the client called in Panic saying that an entire floor (in networking terms, a virtual chassis consisting of 3 switches) was down - no DHCP no nothing!
Immediately I thought well the ClearPass can't cause that, it only determines weather or not a computer should be allowed into the network and if so into which vLAN.
when I ran the Spanning Tree info I saw two ports that were flopping between forwarding and blocking, asking the client to investigate it became apparent someone, accidentally connected ge-1/0/15 with ge-2/0/41.
obviously as soon we broke the loop the network immediately started working normally again.
That got me thinking however.
Since one switch was trying to access another switch, the "recieving" switch would have to check with radius if that "device" should be allowed into the network, and since we never entered any of the switches, the NAC should've blocked it.
So I ran the "show chassis mac-address" command
And searched the NAC DB for that address but came up empty.
Which brings me to my question.
In a Juniper EX switch, does each and every physical interface has it's own MAC address? If so, how can I find the MAC address of a specific interface?
0
I have windows 10 computer:

- when I am using the wired connection, I can access the network map drives.

- when I am using the wireless connection, I can not access the network map drives.

- How can I get my wireless connection to access the network map drives.
0
My Domain controller is giving me the following error VIA dcdiag:

Directory Server Diagnosis


Performing initial setup:

   Trying to find home server...

   * Verifying that the local machine SRADCFS, is a Directory Server.
   Home Server = SRADCFS

   * Connecting to directory service on server SRADCFS.

   * Identified AD Forest.
   Collecting AD specific global data
   * Collecting site info.

   Calling ldap_search_init_page(hld,CN=Sites,CN=Configuration,DC=SRA,DC=LOCAL,LDAP_SCOPE_SUBTREE,(objectCategory=ntDSSiteSettings),.......
   The previous call succeeded
   Iterating through the sites
   Looking at base site object: CN=NTDS Site Settings,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=SRA,DC=LOCAL
   Getting ISTG and options for the site
   * Identifying all servers.

   Calling ldap_search_init_page(hld,CN=Sites,CN=Configuration,DC=SRA,DC=LOCAL,LDAP_SCOPE_SUBTREE,(objectClass=ntDSDsa),.......
   The previous call succeeded....
   The previous call succeeded
   Iterating through the list of servers
   Getting information for the server CN=NTDS Settings,CN=SRADCFS,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=SRA,DC=LOCAL
   objectGuid obtained
   InvocationID obtained
   dnsHostname obtained
   site info obtained
   All the info for the server collected
   * Identifying all NC cross-refs.

   * Found 1 DC(s). Testing 1 of them.

   Done gathering initial info.


Doing initial required …
0
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I have a Bell (my ISP) 2000 modem/router.  It is connected directly to the PC beside it by way of an ethernet cable.  This modem/router sends a wireless signal throughout the house.  The wifi signal is picked up by other PCs, laptops, tablets and 3 televisions.  I would like to setup a simple home network for my PCs, laptops and tablets.
How do I do this?  I would like to do this without disrupting the existing wifi system throughout the house.
Thanks,
Capreol
0
I run AVG Anti-virus, Hitman Pro and Anti-malwarebytes on one of my computers.  Over the last several weeks I am running into a whole lot of system problems.  I tried to install avg tuneup today and it would not install.  I called AVG and they stated that it appears that I have a network worm.  So I booted up in safe mode, ran avg scan and anti-malwarebytes.  

I also ran hijackthis, to attempt to get rid of the nastiness but one entry will not delete.   It has been a long time since I have cleaned pcs.  Anyone here like to direct me on how to get rid of this thing and clean up my computer so it runs right?

Thanks,
0
Hi

I have clients that use dual uplinks for their customer sites
The second uplink, generally via LTE, serves as a backup access

The problem is that both uplinks obviously have their own public IP addresses

Therefore when in backup mode the site has to be reached via a different IP address

What alternative solutions/options exist that would allow us to present a single address to the outside world whether we are in normal or backup mode ?

thanks
yann
0
Greetings wise wizards of EE:

I'm helping a friend who has a Dell 2155cn network printer, which he uses for his Windows 7 laptop and Windows 10 desktop. While the device prints just fine on both machines via the network, I am having a devil of a time getting it to scan to the Windows 10 machine. The printer is connected to a wireless access point, as it is not wireless itself, and it sits in the garage.

This scanner is set up to scan to a shared folder, typically named "Scans", and placed just inside the C drive (C:/Scans). The scanner is typically set up using the internal web server page inside the printer, a link of which I enclose below. I have consulted the manual extensively, and set up the scanner "Address Book" page on the internal web server page for Windows 10 machine in the exact same fashion as the Windows 7 machine, being careful to use the proper settings, such as the user name, password and server (computer) IP address. However, I just cannot get the scanner to scan... it keeps producing a variety of "031-XXX" messages (link enclosed below), such as "Cannot find SMB server" or the like. I have tried temporarily disabling the firewall, re-downloading and installing the Windows 10 drivers, power-cycled the router, wireless access point, printer and computer, all to no avail.

I am completely out of ideas, and I am hoping one of you wise wizards can help. Here are some links to both the network scanner set up and error message page.

Dell 2155cn network…
0
I am working with a Brother MFC-9120 CN
I want to connect the printer to the home network wirelessly. The printer only connects to the home network.
I noticed in the manual it talks about using a bridge I think there was a USB device that came with the printer. No one knows or can locate that USB.

The printer does have a USB port. I read somewhere that I can buy a dongle insert the dongle in the USB port and it should connect to the network.

Any comments?

Thanks!
0
Peplink Balance One router/ap unit reporting latency issues with wired/hard wired network devices.  need to perform direct to the cable modem first but I like to have access and documentation later for if and when I have to troubleshoot this unit.   The site seems to be lacking a manual nor is as easy as reaching the gateway IP to access the GUI.

Anyone familiar with access to this unit?  Does anyone spot the manual?  I sent a troubleshooting ticket a month ago to Peplink and they have yet to respond.  They don't even have one phone number on their site anywhere.
0
I'm trying to setup another SSID on a Cisco 2504 WLC. I've mirrored (I believe) the settings of an already existing SSID/network with the difference of subnet, etc. The traffic is routed through a Cisco 2811 and various switches. The switch that identifies the VLANs, has also been configured accordingly. Could be problems in multiple places since I've done this a number of times, but never came across this issue.

To start, I can't ping the interface IP of that newly created SSID from any device, including the switch that the controller is connected to.



This is the config of the switch that the controller is connected to where the other networks work:

2018-07-13_12-20-31.png
I figure if I can get to the interface IP (as usual), I'll be able to get to my DHCP server, get an address, and get to the internet.

Any assistance is greatly appreciated.
2018-07-13_12-16-47.png
0
Hi All;


I have just tried to run my application with SQl Server back end on a different machine with a different network, now I'm getting the error attached .I'm not too sure what it is I asked the IT Manager he assured me that he installed the correct ODBC drivers. Could it be the code below not correctly done:

Option Compare Database
Option Explicit

Function ShowConnectInfo()
  Dim dbs As DAO.Database
  Dim tdf As DAO.TableDef
  Set dbs = CurrentDb()
For Each tdf In dbs.TableDefs
    If (tdf.Connect <> vbNullString) Then
        tdf.Connect = "ODBC;DRIVER={sql server};DATABASE=MDCAccounting;SERVER=USER\SQLEXPRESS;Trusted_Connection=Yes;"
Debug.Print tdf.Connect
        tdf.RefreshLink
    End If

 Next tdf

Set tdf = Nothing
  Set dbs = Nothing
End Function

Regards

Chris
Sql-Server-error.docx
0
I work for a school district and have three buildings each with roughly 300 computers.  We have two buildings in one network (ip scope) and the third in its own network.  We are thinking about closing the one school building and moving the 300 computers and users to the other campus of two building.  I am concerned about having so many devices on one broadcast domain.  Would one network with 1,000 devices be a bad idea in terms of traffic?
0
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Source:        NfsClnt
Date:          7/11/2018 9:57:49 PM
Event ID:      16397
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      MDFS.mddist.local
Description:
  Windows(R) Lightweight Directory Access Protocol (LDAP) failed a request to connect to Active Directory Domain Services(R) for Windows user <MDDIST\Administrator>.

  Without the corresponding UNIX identity of the Windows user, the user cannot access Network File System (NFS) shared resources.

  Verify that the Windows user is in Active Directory Domain Services and has access permissions.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="NfsClnt" />
    <EventID Qualifiers="32768">16397</EventID>
    <Level>3</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2018-07-12T02:57:49.000Z" />
    <EventRecordID>77</EventRecordID>
    <Channel>Application</Channel>
    <Computer>MDFS.mddist.local</Computer>
    <Security />
  </System>
  <EventData>
    <Data>MDDIST\Administrator</Data>
  </EventData>
</Event>
0
macOS 10.13.6 will not automatically connect to LAN at startup

macOS 10.13.6 (updated yesterday from 10.13.4) does not connect to local network at startup. And stopped connecting before OS update.

Connecting to LAN using System Preferences/Network and exiting with ‘Automatically join this network’ enabled (clicked) but is not enabled at subsequent shutdown/logins.

Other Mac (10.13.6) on same network automatically connects as do several iOS devices.

All devices are wirelessly connected. with Airport Extreme. Seems this issue began around the time of addition of 2 HomePods to network.
0
We lost power for several hours yesterday and since bringing everything back up I am having issues accessing Exchange 2010 email from outside the network.  When on the LAN we can send and receive email both to internal and external users.  However if I go to external network and try to access my email either using the email client on my iphone or through OWA it gives a generic cannot connect message.  I ran the testconnectivity.microsoft.com test and it is giving me the following errors.

Testing TCP port 443 on host autodiscover.domain.com to ensure it's listening and open.
       The specified port is either blocked, not listening, or not producing the expected response.
Testing TCP port 80 on host autodiscover.domain.com to ensure it's listening and open.
       The specified port is either blocked, not listening, or not producing the expected response.
Attempting to locate SRV record _autodiscover._tcp.domain.com in DNS.
       The Autodiscover SRV record wasn't found in DNS.


I checked the firewall and port 443 and 80 show they both show ok.
0
Dear Experts

to setup new office what IP addressing is recommended as it is common to use 192.168.1.0/24 but I would like to go for something different and this network will have to be get connected over the VPN from other location and they may be using 19.168.1.0/24,  this new network yet to be setup will have internal dns and dhcp and leased line and mpls connectivity. the total users or end devices within this network will not be more than 75, I prefer other than 192.168.1.0/24 is there a recommend/best  practice in selecting a particular ip addressing for private lan network please suggest,  is it good to go with 192.168.0.1/24 or something like 192.168.100.0/24 or any other ip addressing recommended please suggest.
0
I have a potentially stupid question.

I have only worked with Cisco ASA 5505 appliances and SG/SF 300  series Cisco switches.  Recently I picked up a Catalyst 3560CX 8 TC model switch, and have been having nothing but trouble trying to configure it.

On my bench I was able to assign ports 1-8 a basic 'switch' management IP of 192.168.0.253.  Seemed to work fine.  The PC I plugged into port 1 had no issues pinging it, connecting to it, allowing me to configure it.

I then took the unit onsite and plugged port 1 into a Cisco SG300 series switch.
The port light on the C3560CX went green, switched immediately to amber, and stayed solid amber.  The switch port on the SG300 went dead as though nothing was connected.  I disconnected the cable but the C3560CX still showed a solid amber light for that port.  Just for fun I plugged the cable into port 3.  Exactly the same outcome.

I checked the port on the SG300.  I ensured it was set to Trunk.  I turned off Auto SmartPort for the SG300 interface (GE30).  No change.  
Rebooted C3560CX and waited the 5 minutes for it to come backup - did exactly the same thing = dead amber port.

I disconnected the C3560CX, moved it to a PC, static assigned an IP to the PC, and hooked it up a switch port.  Now I can ping 192.168.0.253 no problem. I can log into the web console no problem.  Everything seems fine.

Everything is VLAN1 - default.  Ports set to trunk.  

Hook it back up to the network by uplinking to SG300 - dead port.

0
is it possible to track every item that is copied off the network or computer to an external device?
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.