Dear EE,

I have found warning at DB server when user has reported Application dis-connectivity.
 
1)  User reported Application Dis-connectivity Error as attached.


2) We investigate the issue and look in to the Event logs and found below WARNING. Event Id : 4227

TCP/IP failed to establish an outgoing connection because the selected local endpoint was recently used to connect to the same remote endpoint. This error typically occurs when outgoing connections are opened and closed at a high rate, causing all available local ports to be used and forcing TCP/IP to reuse a local port for an outgoing connection. To minimize the risk of data corruption, the TCP/IP standard requires a minimum time period to elapse between successive connections from a given local endpoint to a given remote endpoint.


Please confirm will user application error is due to this above error.

Thanks

I am having problem with using arpspoof on my kali linux box.  i am receiving the following error " arpspoof: couldn't arp for host 10.10.9.5(windows host). I am able to ping to all my network devices and SVI's. I have bulilt out my own Network lab that have cisco routers, swithches, and firewalls. All my devices are receiving ip's from my DHCP server, and able to get on the internet. But for some strange reason the kali linux box arp table isn't populating and it's showing only  10.10.6.1 (which is the SVI), and the cisco switch arp table is populated.  

Below is the command Im using.

arpspoof -i eth0 -t 10.10.9.5 10.10.9.1

I have 4 vlans in my network (User's, Server's, Management,and kali)

10.10.9.x/24= users
10.10.8.x/24= servers
10.10.7.x/24= managment
10.10.6.x= kali

Hi Experts,
How to grep connected tcp IP & Port connection then forcefully kill using batch.

example;-
netstat -a output is

Active Connections

  Proto    Local Address                        Foreign Address                State
  TCP       192.168.1.101:49366            192.168.1.55:65000          ESTABLISHED
  TCP       192.168.1.101:49475            192.168.1.55:64000          ESTABLISHED
  TCP       192.168.1.101:49384            192.168.1.55:63500          ESTABLISHED
  TCP       192.168.1.101:49396            192.168.1.55:22                 ESTABLISHED

Need to forcefully kill all TCP connection which is connected with 192.168.1.55

Can someone explain to me where consensus algorithms fit within the TCP/IP model?  Let use Raft as an example.  Does it use multicast?  Does it use it's own transport number or TCP/UDP?  Does it live on the application layer?

Thanks

Cisco Network Question:  2 vlans and one Internet connection

I need to set up a guest network for access to the Internet-only.  The network configuration is:
-  COX Internet
-  RTR_FW: Meraki MX64
-  Core_Switch: WS-C2960X-48FPD_L:  LAN-base
-  Distribution_Switches: WS-C3560CG-8PC-S: IP-base

We presently have one external IPv4 address and use 192.168.168.0/24 internally for operations.

The 2960X is a layer 3 capable switch.

Is there a way to route another network VLAN, something like 172.16.168.0/24, to the Meraki RTR Internet connection.  The Meraki is presently port mapping the external address to the 192.168.168.0/24 network with the Default router of 192.168.168.1.  I used a trunk to the Meraki RTR-FW from the 2960X and it works....

Or do I need to add a RTR and use two virtual interfaces?

Hello,
I would like to convert HTTP streaming HLS  to UDP or RTP, I  have tried VLC  and it works only in windows 10, does anyone  have any other software example that is validated  and is working properly?

Thanks

Today we faced the Email Delay issue on Exchange environment. Emails were delivering with 5 to 7 minutes delay. On investigation, we found following errors on server. It appears from the first error there could be some connectivity issue between the Exchange servers, but both the servers are located on same chassis, the chances of connectivity issue is very low. After restart the issue gone it also shows there was no connectivity issue. What could be the issue?

Error on Server Queue:
{LED=441 4.4.1 Error encountered while communicating with primary target IP address: "Failed to connect. Winsock error code: 10048, Win32 error code: 10048. "Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or deliver failed to all alternate hosts. The last endpoint attempted was x.x.x.x:475]

Warning on Server Log:
TCP/IP failed to establish an outgoing connection because the selected local endpoint was recently used to connect to the same remote endpoint. This error typically occurs when outgoing connections are opened and closed at a high rate, causing all available local ports to be used and forcing TCP/IP to reuse a local port for an outgoing connection. To minimize the risk of data corruption, the TCP/IP standard requires a minimum time period to elapse between successive connections from a given local endpoint to a given remote endpoint.

How can I completely disable IPv6 from all network adapters on a Windows 7 Pro. computer?  The use this method to roll-out that configuration change to hundreds of computers?  Is there perhaps a script?

What I am looking for is to disable or un-check the ipv6 settings.


I want it to be grey'd out or disabled.


According to web page: https://techjourney.net/disable-turn-off-ipv6-support-in-windows-10-8-1-8-7-vista/

I have tried opening a command prompt as administrator and running

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters" /v DisabledComponents /t REG_DWORD /d 0x000000FF /f

Select all Open in new window

But after I run this command I think IPv6 is disabled partly; but, I still see the check mark on the adapters indicating that it is still enabled.  

Question1: How can I disable the ipv6 for all adapters on a windows 7 Pro. PC?  My manager specifically asked me to do the un-check box, to make it look disabled.

Question2:  How can I use that method for a mass deployment to change the config on hundreds of devices?

Question3:  How can I verify that IPv6 is indeed disabled?

Before the registry changes, if I ran an ipconfig all, under "Ethernet adapter Local Area Connection"  I saw
IPv4 Address. . . . . . . . . . . :  ###.##.##.###
Then I saw
DHCPv6 Client DUID. . . . . . . . : ##-##-##-##-##-##-##-##-##-##-##-##-##-##

After the Registry changes, I do not see any reference to DHCPv6 Client DUID. . . . . . . . : ##-##-##-##-##-##-##-##-##-##-##-##-##-##

In the environment I am supporting for NGO's there are 2 Exchange Servers, an Exchange 2003 and an Exchange 2010 Server. On the Exchange 2010 Server since few days the router address 192.168.1.1 is added to the IP Block List on the Hub Transport Server. Even after disabling IP Block Listing on the Organization Level the router address is added regularly to the IP Block List within Hub Transport on Server Configuration Level. Any ideas how to prevent this. Blocking 192.168.1.1 does really block complete incoming mail traffic.

Wired users getting 192.168.1.x IP address.  Instead of 10.10.x.x
Not sure what happened.   Not all the users tho.  Any ideas?
ipconfig /renew /release not helping.  
Need some help troubleshooting.

Hi Expperts,

Using PHP, JS, and/or jQuery, is it possible to detect if the user is using their registered device.

I think that every device world-wide has a unique MAC Address, so I guess maybe my question is how to read the MAC address? However, not of any modem or router, but of the endpoint device (ie-computer, phone or tablet)?

Thank you.

We recently changed a client's subnet from 192.168.1.x to 192.168.71.x.  All is fine, except that we neglected to change one of their devices to the 71.x subnet.  

We're remote now.  If we were onsite, we could change a computer to 192.168.1.x, connect to the device, and change its IP to 192.168.71.x,, then change the computer back.  But we're remote.  

If we change that computer's IP to 192.168.1.x, we lose internet connectivity.  

Is there a way we can still change the computer's IP to 192.168.1.x, but still use the default gateway of 192.168.71.1 to get to the device?  It's looking like we may have to go onsite to do this...

This is a very simple LAN; SOHO router/firewall.

Thanks!

hi,
ps assist why can't change dns ip address and apply register dns settings.