• Closing TCP and UDP ports using Windows command line

    Would anyone know of a way of closing a TCP or UDP socket for a single connection via the Windows command line? After doing some searching, many people said doing a manual page of NETSTAT or NETSH commands, which would monitor the ports. But I'm not looking to monitor, I'm looking to close/kill...

    ITKE352,430 pointsBadges:
  • What’s the complete definition for off_t type?

    I'm sending files from our client to the server using TCP. To end the mark of the file, I would like to send the file size before the actual data so I've been using the stat system call. Now I need to know how many actual bytes it occupies so I can read it correctly on the server. It's defined...

    ITKE352,430 pointsBadges:
  • Does a TCP send a SYN/ACK on every packet?

    I currently have a TCP server that always listens for an incoming client, then it sends one packet of data every single second. Bur I have a quick question: Does a SYN/ACK packet only get sent on initial connections, like this: SYN ACK DATA DATA DATA Or is it sent with every packet, like this: SYN...

    ITKE352,430 pointsBadges:
  • How to redirect TCP-traffic to Unix domain socket

    I have a legacy Linux application that's listening on a UNIX domain socket. Now, I'm trying to connect to it through a TCP-connection on a port (Port 1234). What would be the easiest way to bind the port and then redirect all incoming connections to the domain socket?

    ITKE352,430 pointsBadges:
  • Infiniband: How does IPoIB and TCP fit into it?

    I don't have a strong networking background but I've been doing some research on Infiniband. And I'm not quite sure how the concepts of IPoIB and TCP fit into it. Can someone explain to me how they work / what they do with Infiniband? Which way is better to go?

    ITKE352,430 pointsBadges:
  • Is it possible to use TCP and UDP on the same server?

    I understand this is a short question but it's very urgent. Can I use both TCP and UDP sockets on the same server? Particularly, would I be able to use the same port number too? Thanks!

    ITKE352,430 pointsBadges:
  • How to broadcast a message with UDP and TCP?

    I'm currently working on a .NET solution that runs completely inside a single network. So when a user makes a change to the system, I need to launch an announcement / have everyone hear it. Do you know of a way that I can broadcast a message like this (just like UDP) while keeping a guaranteed...

    ITKE352,430 pointsBadges:
  • Transmission of IP Packets in TCP

    I’ve read that IP packets can sometimes get lost in transmission and that TCP often requests retransmission of lost data.  How often are packets lost permanently?  What are the requirements for retransmission?  Are lost packets a security risk?

    ITKE352,430 pointsBadges:
  • How much faster is UDP than TCP?

    How much faster is UDP than TCP for a general protocol message exchange?

    ITKE352,430 pointsBadges:
  • Why is a TCP Window Update is causing my server to crash?

    I'm making my own server software for a game in Java (everything was written in Java). A big problem I'm having is that I don't have any protocol documentation available so I've been reading packets with Wireshark. So, when a client is connecting, the server is sending it the level file in a Gzip...

    ITKE352,430 pointsBadges:
  • Why would someone use UDP instead of TCP?

    Aside from speed, why would someone use UDP instead of TCP? From what I understand, UDP can lose packets, whereas TCP cannot. What other advantages does UDP offer?

    ITKE352,430 pointsBadges:
  • What’s in your network security and troubleshooting toolkit?

    Just curious what tools you have in your network toolkit? I've heard or used snort, TCPDump, NMap, but would love other suggestions

    Michael Morisy8,323 pointsBadges:
  • Lacking a FQDN during database mirroring on SQL Server 2005

    I am trying to work with database mirroring on SQL Server 2005, and I keep receiving the error message, “One or more of the server network addresses lacks a fully qualified domain name (FQDN). Specify the FQDN for each server, and click Start Mirroring again.” I know that the syntax for a...

    SQL Server Ask the Experts2,585 pointsBadges:
  • How to set proper TCP buffer size?

    Hi, We have 3 AS/400 systems PR, HA (Both are on same physical location) & DR (situated in different physical location around 1000 KM away from PR system). All the three systems are in sync using MIMIX Global. We had 100 mbps WAN link configured for PR to DR replication. PR & HA replication...

    Ketan19305 pointsBadges:
  • Global communication network without the transport layer

    Is it feasible to have a global communication network without the transport later? Thanks!

    ITKE352,430 pointsBadges:
  • Packet Sniffer

    I need to know about packet sniffer with a clear demo and how the packets are transmitted in TCP and UDP.

    ITKE352,430 pointsBadges:
  • Wake on LAN / Magic Packet broadcast doesnt work through PPTP

    Hi, I have a network, where I want to use WOL from a remote PC. It works when I send a packet from inside the network (or on the server). If I connect via PPTP from a remote Windows XP PC, I can't wake up the PC on the LAN. I suspect the broadcast packet doesn't reach the LAN. The PPTP connection...

    Benbje0 pointsBadges:
  • Transfer a file by a batch job

    Hi, I want to transfer a file by a batch-job (which is running on the mainframe) from a mainframe to a windows system. The file should be transferred in binary mode. The problem is that I need the CR/LF at the end of the records in the file after I transferred the file to the windows system. Do you...

    Clitze0 pointsBadges:
  • Save log view in Event Viewer

    Howdy folks, If I create a new log view in event viewer and filter the results, is there any way to save this view? Every time I close event viewer I have to re-create it. Probably just MS by design.... Is there any way to script it?

    TheVyrys0 pointsBadges:
  • Exchange 2003 logon sessions

    Why does exchange server 2003 create so many logon sessions? When you open the ESM and navigate to Administrative Group->Servers->Server->First Storage Group->Mailbox Store->Logons. Some users have as many as fifteen sessions, why? I also get the following error in the application...

    Bpirro5 pointsBadges:

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