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Questions tagged [tcp]

TCP stands for Transmission Control Protocol and is one of the core protocols of the Internet Protocol Suite. TCP complements the Internet Protocol (IP), and therefore the entire suite is commonly referred to as TCP/IP.

TCP is just one communications protocol on the web. Others include:

  • User Datagram Protocol (UDP)
  • Internet Control Message Protocol (ICMP)
  • Hypertext Transfer Protocol (HTTP)
  • Post Office Protocol (POP3)
  • File Transfer Protocol (FTP)
  • Internet Message Access Protocol (IMAP)

TCP on Wikipedia

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Is there software that will convert bidirectional TCP traffic from one port to another?

I have an application that needs to send and receive traffic on a certain TCP port, say 5000. The server component uses port 6000. Is there any software that will allow me to "TCP bridge" these two ports together? I'd like to run this TCP bridge…
makerofthings7
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Windows clients not accepting incoming connections on WiFi

I am having a few issues with clients in remote sites and have narrowed it down to TCP connections not being accepted by/not reaching the WiFi adapter. Outgoing connections are fine, and over Ethernet there is no problem. The adapter is in the…
john
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How do I print the x-forwared-for value in apache?

We have a aws load balancer. The load balancer uses the TCP connections 443 to encrypt the data. Since the load balancer encrypts the IP of the client, in our apache log file we can see only the IP of the load balancer rather then the client. Even…
sriram
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Connecting To FMS Server Issues

I am trying to get my computer to connect to an Adobe Connect server but I have had no luck. The error that Adobe is telling me is "ERROR: FMS Server did not return correctly!" and have done some narrowing down to figure out what the problem is...…
SameOldNick
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Mountain Lion, How can I release port?

$ netstat -ltanp tcp | grep 8000 | grep LISTEN tcp4 0 0 *.8000 *.* LISTEN I want to release this port When I do $ lsof -i:8000 I get nothing I even restarted the machine, nothing helps Please let me…
learner
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TCP Windows scaling on Windows 2008 server

If found only this article on windows 2008 server or Windows 7 TCP Windows scaling. http://8help.osu.edu/3253.html Is there any other information that I can use to change registry that would modify the TCP Window size?
MatBanik
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Impact of Traffic through the first NIC on the second NIC

I have two NICs on a RHEL 6 server. They are both set at 1GB/sec full duplex. The first NIC has lots of small (< 100 byte) TCP socket writes. The second NIC is used to receive a 50 MB/sec TCP input stream where latency is critical. In this setup,…
Prasoon Tiwari
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Protect software default gateway from ip-stealing

We have a corporate network that is comprised of the following elements: Internet cable (wall) <-> (ext interface (DHCP))(Windows Server 2008, TMG-enabled, Internet Gateway)(int interface (static 192.168.0.1) <-> Internal Ethernet Network with…
Maxim V. Pavlov
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Testing -How to generate limited rate tcp streams?

Running with ubuntu. I have clients that has limited transfer rate. I need to test my server to see in how much clinets with limited transfer rate it support? Is there any utility that allow me to download file from server and limit the download…
Avihai Marchiano
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How to distinguish beteen ACKing a SYN/ACK, and ACKing data?

Is there a way to distinguish between ack packet as a response to syn-ack to ack packet during the connection (and not during handshake)? Someone told me that not all OS marked tcp packet during connection as push-ack and some OS (or tools) marked…
Avihai Marchiano
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Can ping servers but cannot connect to them

Sorry in advance if this question is a bit newbi-ish. I downloaded Microsoft Connection Manager and added multiple .rdg files for different servers I need to access. I can browse to only a few of them, but most of them I get the following…
Theomax
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Securing a TCP stream

We have devices at client sites that connect to processes on our servers and provide several streams of TCP data. We currently use VPNs to gain security and be able to connect back to the devices, which run embedded Linux, to administer them. We…
nroose
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Can i configure the tcp SYN retransmission interval?

As far as I know SYN retransmissions: with rounding they occur 1, 3, 6, 12, 24, 48, and then 64 seconds apart. I want to do this on different interval time. what is the name of this parameter? can I control on it in android and windows?
Avihai Marchiano
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IPv6 connect B to A works, A to B fails with B's SYN-ACK receiving ICMP destination unreachable prohibited

I'm testing on IPv6. A is a server in a Cogent colo with native IPv6, call it 2001:db8:1111::1. B is a Mac mini behind an Airport Extreme router behind ISP Comcast; the router is set up to use anycast 6to4, and B is let's say 2002:c000:202::2. On…
Robert Tupelo-Schneck
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server dosnt produce syn-ack

I have a small program that take packets from the nfqueue . change the ip.dst to my server dst (and ttl), recalc checksum and return the packet to the nfqueue. The server and the client are linux and apache web server is run on the server and listen…
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