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Search found 3538 results on 142 pages for 'tcp hijacking'.

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• Wireshark TCP Window Size Value

  - by T Vernon

  I am debugging an application with Wireshark and watching the TCP Window Size value shrink on one side of the communication. If the packet's TCP section shows a "Window size value: 1", does that mean the source's window size is 1 or the destination's window size is 1? I know one side is communicating faster than the other can handle, I just want…

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• protect form hijacking hack

  - by Karem

  Yes hello today I discovered a hack for my site. When you write a msg on a users wall (in my communitysite) it runs a ajax call, to insert the msg to the db and will then on success slide down and show it. Works fine with no problem. So I was rethinking alittle, I am using POST methods for this and if it was GET method you could easily do…

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• Overhead of TLS/SSL on a TCP socket connection?

  - by TK Kocheran

  Is there any bandwidth overhead on using SSL on a TCP connection? I understand, of course, the processing/memory usage overhead in encrypting and decrypting packets, but as far as bandwidth is concerned, what is the difference, if any? For example, given a XML file which is 64KB, will there be any tangible difference in the transfer size of…

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• why can't I open a port on Win 7? is it the app's fault?

  - by rjnagle

  I am having problems opening a port from one Windows PC on my local network. On Windows 7 computer ("Computer A") I running Calibre, an ebook management program that has something called an "ebook content server" . In essence, it serves via the web a content catalog. From Computer A, I can access the content server on localhost. ie.…

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• How to add an iptables rule with source IP address

  - by ???

  I have a bash script that starts with this: if [[ $EUID -ne 0 ]]; then echo "Permission denied (are you root?)." exit 1 elif [ $# -ne 1 ] then echo "Usage: install-nfs-server <client network/CIDR>" echo "$ bash install-nfs-server 192.168.1.1/24" exit 2 fi; I then try to add the iptables rules for NFS as…

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• How it was detected if last ACK lost in TCP connection termination procedure?

  - by sonali

  In TCP Connection Termination, when client enters in TIME_WAIT state means the client waits for a period of time equal to double the maximum segment life (MSL) time, to ensure the ACK it sent was received. (I read above from a book computer networking by kurose and also given in following URL…

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• Is it possible to redirect/bounce TCP traffic to external destination, base on rules?

  - by xfx

  I'm not even sure if this is possible... Also, please forgive my ignorance on the subject. What I'm looking for is for "something" that would allow me to redirect all TCP traffic arriving to host A to host B, but based on some rules. Say host A (the intermediary) receives a request (say a…

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• tcp handshake failed.client send rst (after syn-ack). can any one advice?

  - by user1495181

  architecture: 2 linux computer connected . on the second (192.168.1.1) one run apache server . I have a small program that take tcp packets from nfqueue change the dst ip to 192.168.1.1 in case that the dst ip is 192.168.1.2 (i know that i can do it with iptables , but my program will do…

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• Is it possible to redirect/bounce TCP traffic to an external destination, based on rules?

  - by xfx

  I'm not even sure if this is possible... Also, please forgive my ignorance on the subject. What I'm looking for is for "something" that would allow me to redirect all TCP traffic arriving to host A to host B, but based on some rules. Say host A (the intermediary) receives a request (say…

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• Port scanning from localhost

  - by Jaels

  I see lot of tcp connections on different ports on my server with 'TIME_WAIT' status. Just simple port scan, but i cant see ip address of this bastard because connections is going from my nginx. Can you please give me a tip how can i see IP address of this bastard? Here is example: …

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• How to Calculate TCP Socket Buffer Sizes for Data Guard Environments

  - by alejandro.vargas

  The MAA best practices contains an example of how to calculate the optimal TCP socket buffer sizes, that is quite important for very busy Data Guard environments, this document Formula to Calculate TCP Socket Buffer Sizes.pdf contains an example of using the instructions provided on…

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• When a server IP changes, do exising TCP (e.g. http/mysql) connections remain running

  - by Luke Cousins

  We have some PHP-FPM servers and when they need a database connection, they connect to an HAProxy server which selects them a database server to use and the connection opens. When we then want to perform some maintenance on the HAProxy servers (such as config changes requiring an…

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• Who's setting TCP window size down to 0, Indy or Windows?

  - by François

  We have an application server which have been observed sending headers with TCP window size 0 at times when the network had congestion (at a client's site). We would like to know if it is Indy or the underlying Windows layer that is responsible for adjusting the TCP window…

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• How to write custom data to the TCP packet header options field with Java?

  - by snarkov

  As it is defined (see: http://www.freesoft.org/CIE/Course/Section4/8.htm) the TCP header has an 'Options' field. There are a couple of options already defined (see: www.iana.org/assignments/tcp-parameters/) but I want to come up with my very own. (For experimenting/research.)…

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• WCF Service error received when using TCP: "The message could not be dispatched..."

  - by StM

  I am new to creating WCF services. I have created a WCF web service in VS2008 that is running on IIS 7. When I use http the service works perfectly. When I configure the service for TCP and run I get the following error message. There was a communication problem. The …

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• Can I use WCF NET.TCP Protocol from Silverlight 4 for a public website ?

  - by pixel3cs

  Does anyone know if the new NET.TCP feature of Silverlight 4 can be used for public websites ? From what I know, in the Silverlight 4 Beta they announced that WCF NET.TCP can only be used for intranet applications. The reason I am asking this is because I want to recode…

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• Interview Questions that can be asked on TCP/IP, UDP, Socket Programming ?

  - by Shantanu Gupta

  I am going for an interview day after tomorrow where i will be asked vaious questions related to TCP/IP and UDP. As of now i have prepared theoritical knowledge about it. But now I am looking up for gaining some practicle knowledge related to how it works in a network.…

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• Port forwarding DD-WRT

  - by Pawel

  Hi, I'am runing locally service on port 81 (192.168.1.101) I would like to access server from outside MY.WAN.IP.ADDR:81. Everything is working fine on my local network, However can't access it from outside. Below iptables rules on the router. I am using dd-wrt and…

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• Why does UDP have a length field in the header and TCP does not?

  - by IP Help

  Why does UDP have a length field in the header and TCP does not? I am guessing that the length of the segment in TCP is inferred from the IP header but one should be able to do the same for a UDP datagram

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• Are there any protocols/standards on top of TCP optimized for high throughput and low latency?

  - by Nosrama

  Are there any protocols/standards that work over TCP that are optimized for high throughput and low latency? The only one I can think of is FAST. At the moment I have devised just a simple text-based protocol delimited by special characters. I'd like to adopt a…

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• how to know which is the last TCP segment received by the server when data is transferring?

  - by jerams

  When transferring data in TCP, and given all the incoming and outcoming packets, how will one know if the packet received is the last of the data? TCP packets are fragmented into smaller parts. I'm transferring over the HTTP protocol.

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• How to configure your WCF service to work as normal TCP server?

  - by Ole Jak

  How to configure your WCF service to work as normal TCP server? Is it possible, how (how to disable all that binding specific crap so to keep your service URL like http://example.com:4444/service and be able to wirk vith pure HTTP\TCP streams )

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• WCF service: how to open and read from TCP/HTTP stream?

  - by Ole Jak

  So I need my WCF service to be capable of starting TCP stream on HTTP request (like sockets do) and be capable of reading if any one is sending TCP respons to it while reciving stream. I need my service to have acsessable to Internet browsers url like…

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• Turn-based Client-Server Card Game - Unicast (TCP) or Multicast (UDP)

  - by LDM91

  I am currently planning to make a card game project where the clients will communicate with the server in a turn-based and synchronous manner using messages sent over sockets. The problem I have is how to handle the following scenario: (Client takes…

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• openvpn TCP/UDP slow SSH/SMB performance

  - by Petr Latal

  I have question about strange behavior of my openVPN configuration on Debian lenny. I have 2 server configs (one proto tcp-server based and one proto udp based). ISP bandwidth is 7Mbit/7Mbit. When I uses proto tcp-server my download server rate is…

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