Skip to main content

networking - Windows 10 loss of TCP connectivity


I'm running Windows 10 professional with a Realtek PCIe GBE Family controller integrated on my MSI 170A-Pro mainboard. Usually everything is fine. The network works fine and interruption free on Linux and Windows. So the hardware seems to be okay.


However, I experience a loss of connectivity about once a day using Windows 10. The symptoms are a bit weird though:



  • I cannot connect to any website in either Chrome or Internet Explorer (Chrome says ERR_CONNECTION_FAILED)

  • except that Google usually works (probably because a connection to it is maintained by chrome)

  • my Google Talk connection continues to work (it seems only to affect new connections)

  • nslookup works fine for any domain

  • I can ping the sites I want to browse

  • I have a valid IPv4 and IPv6 address

  • I can ping the default gateway on IPv4 and IPv6

  • Windows Network diagnostics can not find any problems

  • Windows says I'm successfully connected to the Internet

  • other devices on the network continue to have no problems (it's not router related)


However the only solution is to either reset the network through the control panel option and reboot or by calling netsh winsock reset in an admin console and reboot. Rebooting alone does not solve the problem.


So far I did



  • disable power management for the network card

  • upgrade to the most recent driver from Realtek


I'm completely at loss what exactly is wrong. Because the network obviously works. There seems just to be certain part of it not working.


If anyone has any idea how to debug this further I'm all ears!


Please note this is a wired network


ipconfig output follows (it looks exactly the same when the connection works)


Windows IP Configuration


Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : w00t
   IPv6 Address. . . . . . . . . . . : 2a02:2450:1024:442:808:aa56:5c13:9413
   Temporary IPv6 Address. . . . . . : 2a02:2450:1024:442:a5e3:4f74:fb29:5d13
   Link-local IPv6 Address . . . . . : fe80::808:aa56:5c13:9413%3
   IPv4 Address. . . . . . . . . . . : 192.168.1.165
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : fe80::1e87:2cff:fe6a:b6b0%3
                                       192.168.1.1

Tunnel adapter isatap.w00t:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . : w00t

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Connection-specific DNS Suffix  . : 
   IPv6 Address. . . . . . . . . . . : 2001:0:9d38:6ab8:2cd7:1e65:3f57:fe5a
   Link-local IPv6 Address . . . . . : fe80::2cd7:1e65:3f57:fe5a%12
   Default Gateway . . . . . . . . . :

Some additional information:



  • when rebooting to Linux, the network connection works flawless there, rebooting back to Windows and the problem is still there

  • completely powering off the machine does not solve the problem

  • HTTP sites on my local network are not reachable as well

  • the problem is DNS independent, sites are not reachable via IP address either

  • SMB connections to a Windows-Share do not work either


To me it looks like the TCP-Stack of the Operation-System somehow "gets stuck". Ping (ICMP) and DNS (UDP) work, HTTP and SMB (TCP) don't.


This got me to try another thing: I tried to use PuTTY to ssh (TCP) to another machine and it brings up the error: Network error: No buffer space available


Above error pointed me to https://serverfault.com/questions/131935/network-error-no-buffer-space-available which in turn led me to check the Event Viewer which shows Error 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.



When disabling and re-enabling the device (which the knowledge base entry suggests) the error simply reoccurs in the log.


It seems like some program is exhausting the available outgoing TCP ports. So the questions become:



  • how to figure out which program is the culprit?

  • why wouldn't a reboot solve this problem?



Answer



EventID 4227 seems related to too many outstanding TCP connections.


Not an answer, but the following first steps are too long for a comment:



  1. Run sfc /scannow

  2. In Device Manager delete the network adapter and reboot

  3. Use TCPView to see outgoing connections when this happens

  4. Increase maximum of outgoing connections by setting TcpNumConnections and see also the other parameters described in this article

  5. Disable IPv6

  6. Restart Chrome

  7. Start Windows in Safe mode with network and if this stops happening then some installed application is to blame

  8. Use Chrome in incognito mode to temporarily disable extensions

  9. Try Firefox

  10. Do you have many tabs open? Or when this is happening do you always have one particular website open?


The results of the above may help with localizing the problem.


Comments

Post a Comment

Popular Posts

How do I transmit a single hexadecimal value serial data in PuTTY using an Alt code?

I am trying to sent a specific hexadecimal value across a serial COM port using PuTTY. Specifically, I want to send the hex codes 9C, B6, FC, and 8B. I have looked up the Alt codes for these and they are 156, 182, 252, and 139 respectively. However, whenever I input the Alt codes, a preceding hex value of C2 is sent before 9C, B6, and 8B so the values that are sent are C2 9C, C2 B6, and C2 8B. The value for FC is changed to C3 FC. Why are these values being placed before the hex value and why is FC being changed altogether? To me, it seems like there is a problem internally converting the Alt code to hex. Is there a way to directly input hex values without using Alt codes in PuTTY? Answer What you're seeing is just ordinary text character set conversion. As far as PuTTY is concerned, you are typing (and reading) text , not raw binary data, therefore it has to convert the text to bytes in whatever configured character set before sending it over the wire. In other words, when y...
Post a Comment
Read more

linux - Extract/save a mail attachment using bash

Using normal bash tools (ie, built-ins or commonly-available command-line tools), is it possible, and how to extract/save attachments on emails? For example, say I have a nightly report which arrives via email but is a zip archive of several log files. I want to save all those zips into a backup directory. How would I accomplish that? Answer If you're aiming for portability, beware that there are several different versions of mail(1) and mailx(1) . There's a POSIX mailx command, but with very few requirements. And none of the implementations I have seem to parse attachments anyway. You might have the mpack package . Its munpack command saves all parts of a MIME message into separate files, then all you have to do is save the interesting parts and clean up the rest. There's also metamail . An equivalent of munpack is metamail -wy .
Post a Comment
Read more

keyboard - Is there any utility/method to change Windows key bindings to type rare chars to currently empty bindings?

I'm currently typing this post with my windows XP machine and (Spanish) keyboard, and I'd like to add some extra symbols to my text. I could open the "char map" windows utility, look for the desired symbols, and paste them. But I'd like something quickier. For example, when I'm using my OSX Mac at work, I can easily add a ©, ™, ® or similar symbols, just pressing some weird ALT-GR + G / H / J, key combinations. In my (Spanish) keyboard mapping, these combinations are empty, as they don't produce any char at all, which, on the other hand, is perfectly normal and desirable. So, I thought: Why couldn't I add some extra key mappings on top of my currently empty ALT-GR + G/J/H Keys in my Spanish keyboard, and thus, being able to quickly type these special symbols? So that's my question: Is there any utility/method to achieve that effect under windows? (My version is XP). I've even googled this for some time but no luck. I've been a long term Hot...
Post a Comment
Read more

Desktop reboots itself on sleep or hibernate

I have been using an ASUS M2NPV-VM motherboard for main home desktop workstation, operating Windows Vista x64. This computer has right from day one not been able to enter hibernate or standby; after Windows performs its final actions and brings the machine down, it would automatically revive itself for a reboot. Updating to the second latest BIOS (1201)has not helped (the latest BIOS revision would induce video refresh problems rendering it unusable). I have been reading related discussions on incidents similar to mine to no avail of a true workable solution. They appear to be more speculative guesses rather than actual knowledge on the inner workings of motherboard hardware. Does anybody have any electronic engineering experience on PC energy-saving standards to provide a more informed opinion how to go about getting this to work? More stories: this motherboard could not even reboot properly the first thing i used it. It was due to refresh rate of the onboard GPU, which had no influe...
Post a Comment
Read more