Open a test TCP connection to a specified IP/Port
Question I’m looking for a tool that works across windows (xp through 7) that will allow me to open a TCP connection to a specified ip and port. This functionality used to exist in windows xp (netsh...
View ArticleMinimum size of the data part of TCP segment
Question My question has two parts: I know that the “data” part of an Ethernet frame can be 46~1500 bytes. Considering the IP header of 20 bytes + TCP header of 20 bytes, the minimum “data” size of a...
View ArticleDoes change of tcp_keepidle or any of the tcp parameters require a reboot(AIX)?
Question AIX 5.3 oslevel -r 5300-12 We require to change the tcp_keepidle value using : no -o <tcp_parameter>= <tcp _value> Does this change require a reboot or network services restart to...
View ArticleHow can I setup a Bluetooth device to serve web pages to a BT client via...
Question I’m thinking of making a linux-based Blueooth enabled device, which allows an external client (e.g. a laptop) to connect to it via TCP over Bluetooth and retrive web pages which allow it to...
View ArticleHow to use proxy to filter data from particular IP?
Question I am running an online game for kids but lately I have been experiencing attacks from some vile individuals who just like ruining it. I assume (based on Windows log) that they connect hundreds...
View ArticleTransmission Contol Protocol (TCP) confusion
Question I am confused as to how the TCP actually works. I have read in several books and articles that it is responsible for the rearranging of transmitted datagrams at the receiving host. However, I...
View ArticleOS X Failure in Path Maximum Transmission Unit (PMTU) Black Hole Router...
Question This all started when I was trying to download a podcast on my Mac. This happens in both Snow Leopard and Lion when the Ethernet interface is set to use Jumbo Frames. prompt> curl -v -o...
View ArticleHow can I disable TCP window scaling?
Question I had previously been using Ubuntu 11.10 and recently, Ubuntu 12.04. However, due to a stupid mistake on my part, I was forced to reinstall Windows 7. One of a multitude of problems is that my...
View ArticleSubnet mask of 255.255.255.255
Question I have a subnet mask of 255.255.255.255.( Why is my subnet mask 255.255.255.255?). I refer that from the above question that it is as good as each computer is on its own network and cant...
View ArticleHow can I open a TCP/UDP connection on Linux?
Question I am looking for a simple command line tool to open TCP/UDP server/client on a desired port on a Linux machine. Are there any applications or commands that I can use to achieve this? Asked by...
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