topic Re: ACK storm -- how can I prevent it? in Network Security https://community.cisco.com/t5/network-security/ack-storm-how-can-i-prevent-it/m-p/1070259#M78747 <HTML><HEAD></HEAD><BODY><P>you can try netsh winsock reset</P><P>to solve the tcp stack issue on the pc.</P><P></P><P>Oszkar</P></BODY></HTML> Sat, 27 Sep 2008 05:44:02 GMT oszkari 2008-09-27T05:44:02Z ACK storm -- how can I prevent it? https://community.cisco.com/t5/network-security/ack-storm-how-can-i-prevent-it/m-p/1070258#M78746 <P>It looks like I have an end user who's TCP stack is not working correctly: immediately after sending his initial HTTP GET, he sends an ACK for a packet I haven't sent yet. I send the proper sequence number on the reply but he's stuck on the wrong one and away we go with an ACK storm that lasts thousands of packets on multiple streams.</P><P></P><P>I'm amazed that nothing in the path kills the session... I have an ASA w/IPS and a CSS fronting WebLogic web servers and none of them do anything except reply like mad.</P><P></P><P>I'm hunting for a way to stop these things from dragging down performance but I don't see anything yet... suggestions?</P><P></P><P>Thanks - Al</P> Sun, 10 Mar 2019 11:18:32 GMT https://community.cisco.com/t5/network-security/ack-storm-how-can-i-prevent-it/m-p/1070258#M78746 ALAN HARKRADER 2019-03-10T11:18:32Z Re: ACK storm -- how can I prevent it? https://community.cisco.com/t5/network-security/ack-storm-how-can-i-prevent-it/m-p/1070259#M78747 <HTML><HEAD></HEAD><BODY><P>you can try netsh winsock reset</P><P>to solve the tcp stack issue on the pc.</P><P></P><P>Oszkar</P></BODY></HTML> Sat, 27 Sep 2008 05:44:02 GMT https://community.cisco.com/t5/network-security/ack-storm-how-can-i-prevent-it/m-p/1070259#M78747 oszkari 2008-09-27T05:44:02Z