problem about tcpip-Collection of common programming errors
Warren P
sql-server sql-server-2008-r2 tcpip
So far I have learned the following facts about Microsoft SQL Server Express, including version 2012, and earlier versions like 2008R2, and 2008, and for the most part all the way back to SQL Server 2005. I am configuring an SQL SERVER on a “workgroup server” machine, that is to say, it’s a dedicated server box, running Windows Server OS, but it’s using a WORKGROUP, and it’s only running Microsoft SQL Express.Note the following background facts:Configuring an SQL Express instance comes out of t
tomlogic
networking ethernet tcpip wired-networking
I’ve got a windows XP machine and a windows 7 laptop connected by an ethernet cable. The xp has static ip address 169.254.84.221 and the windows 7 has 169.254.84.220. both subnet masks 255.255.255.0.They can’t ping each other (Or do anything else for that matter) edit: wierdly enough they can play each other at Unreal Tournament gotye 😛 testing the sequels now.using the ping command just gives request timed out over and over again.I’ve rebooted both machines and repaired the network and troub
liwp
windows tcpip icmp
We have a tool which is used to manage a server process remotely over TCP. One of the tools features is to check if the server is running by attempting to connect to the server in a loop for a given period of time. When we used the tool to check that a server was not running, we noticed that the accuracy of the timings were way off on Windows, e.g. attempting connections for 2s to a dead server would result in the tool running for 7s rather than the expected 2s, whereas on Linux the timings are
esac
dns ssh tcpip tunneling ns-record
I’ve seen a few guides out there, but I could not get any of them to work. I can point NS records to my domain, so it sounds like I should be able to do this. I tried setting up a DMZ for the server portion, no luck at all.
uSlackr
windows-7 tcpip
For a test purpose, I would like to increase the default tcp timeout to say 2 mins. I tried this: How to set TCP/IP abort interval or timeout in Windows XP?http://support.microsoft.com/kb/170359and set TCPInitialRtt t0 0x10But I still have 21 seconds timeout.I am using Windows 7.Qns:Should I reboot windows after changing the registry (I already did before trying though)
aireq
security networking tcpip tcp udp
Here’s something that has always baffled me. Why is it bad to have open ports on your computer? Assuming you don’t have a virus on your computer or some other program listening to a port that may actually do something why does it matter if a port is open? If some malicious person starts sending packets to a port, but nothing is there to receive the data and do something with it why does it matter? A computer doesn’t just arbitrarly execute any data it receives. I understand flooding a computer w
Registered User
networking tcpip tcp
I am trying to understand what is the difference between TCP Half Open Connection and TCP Half closed connection can any one tell what exactly are they?
cmorse
networking windows-8 dns tcpip
Today my machine stopped being able to access the internet. I can still access some local network resources. When I looked in the error log I saw following tcpip warning:A request to allocate an ephemeral port number from the global UDP port space has failed due to all such ports being in use.I ran netstat -anob and in the output DNScache is listed thousands of times (starting from port 50000 up to 65536).This is the second time that this has happened to me. Killing the DNSClient process based o
Sysadminicus
centos nfs tcpip opensolaris zfs
I have a CentOS 5 VMWare server connecting to an OpenSolaris 2009.06 machine over NFS that holds the disk images. My virtual machines seem to be bound by slow IO so I’d like to do everything I can to optimize the connection. I’m not sure of the best way to measure the throughput on a production system, but some unscientific tests using dd bs=1024k count=400 show local (OpenSolaris) writes of ~1.6GB/s and remote (CentOS) writes ~50MB/s. I imagine these are lower than what I’m actually getting sin
Clay Nichols
windows networking ip tcpip arp
Our network gave an error that there was an IP address conflict and I’d like to find what all the device IP addresses are. (I’ve also had need of that before). (update/clarification:I’m looking for a Windows-based too.)Any suggestions?I’ve read suggestions for various tools (Look@Lan, Angry IP Scanner) and I’m looking for suggestions from people who have used these or other tools.
Y.G.J
windows-server-2003 tcpip rpc
windows 2003 is getting this error. restart the machine or just the network connection fix the problem.date and time is the same one. tcp/ip is started and running remote registry is runningthe changes made lately to the network is that the DC crashed and went to IT for restore and antivirus is not up to date because license issue (purchase delay)what can be fix the problem?
Jeff Atwood
linux routing tcpip
We had a little failover problem with one of our HAProxy VMs today. When we dug into it, we found this:Jan 26 07:41:45 haproxy2 kernel: [226818.070059] __ratelimit: 10 callbacks suppressed Jan 26 07:41:45 haproxy2 kernel: [226818.070064] Out of socket memory Jan 26 07:41:47 haproxy2 kernel: [226819.560048] Out of socket memory Jan 26 07:41:49 haproxy2 kernel: [226822.030044] Out of socket memoryWhich, per this link, apparently has to do with low default settings for net.ipv4.tcp_mem. So we incre
MadHatter
windows ip tcpip tcp icmp
I’m using netstat on Win XP to check protocol transmission details for TCP, IP, and ICMP. There is transmission only in TCP. No transmission in ICMP is understandable since it’s for errors and I assume that there were none, but why is there no transmission through IP?
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