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| Reasons for TCPIP Resets (RST) 461 10054 |
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| PeterPotkay |
 Posted: Mon May 19, 2008 4:24 pm Post subject: Reasons for TCPIP Resets (RST) 461 10054 |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Came across this on the Tech Notes page on IBM's MQ Support page. Since these errors get asked about so often, I thought I'd post it here.
http://www-1.ibm.com/support/docview.wss?rs=171&context=SSFKSJ&dc=DB520&dc=DB560&uid=swg21305235&loc=en_US&cs=utf-8&lang=en
| Quote: |
Question
Why does TCPIP reset a connection?
Answer
Reasons for TCP/IP resets:
If a connection is un-orderly terminated, such as when a client box is recycled, TCP will reset the connection.
If an application requests a connect to a port and IP address on which no server is listening, TCP will send a reset.
If an application closes a socket with data still in the application receive buffer, the connection is reset to allow the remote partner to know that the data was not delivered.
If data arrives for a connection that has been closed the connection will be reset.
If an application closes a socket and sets the linger socket option to zero, TCP will reset the connection; as linger 0 instructs TCP not allow the connection to linger waiting for retransmitted packets.
If an invalid TCP segment arrives for a connection, for example, a bad acknowledge or sequence number can cause a reset.
When the connect request times out, TCP will stop trying to connect to a particular port and ip address and reset the connection.
A Firewall can reset connections if the packet does not adhere to the firewall rules and policies. For example a source or destination port or IP address does not match the firewall rule or policy.
When the retransmit timer expires, TCP will stop trying to retransmit a packet and reset the connection.
A bad hardware device can cause a TCP reset.
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Peter Potkay
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