TCP session is not timing out even when link is shut
Multi tool use
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty
Sequence of steps:
Using nc -l 9999 started listening on ubuntu vm.
Ran nc client is on another linux vm to connect to the above server
the interface connecting the client to server is shutdown
The application is not going down even after a long time (few hours)
Is this expected? I am using nc to replicate an issue wherein portscanner is connecting to an application (service port) and disconnecting ungracefully. The server keeps all these connections alive forever. Is this expected?
It is seen across all tcp applications including cassandra/zookeeper and in house applications.
tcp-ip
asked 3 mins ago
SriramSriram
11
New contributor
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty
Sequence of steps:
Using nc -l 9999 started listening on ubuntu vm.
Ran nc client is on another linux vm to connect to the above server
the interface connecting the client to server is shutdown
The application is not going down even after a long time (few hours)
Is this expected? I am using nc to replicate an issue wherein portscanner is connecting to an application (service port) and disconnecting ungracefully. The server keeps all these connections alive forever. Is this expected?
It is seen across all tcp applications including cassandra/zookeeper and in house applications.
tcp-ip
asked 3 mins ago
SriramSriram
11
New contributor
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty
Sequence of steps:
Using nc -l 9999 started listening on ubuntu vm.
Ran nc client is on another linux vm to connect to the above server
the interface connecting the client to server is shutdown
The application is not going down even after a long time (few hours)
Is this expected? I am using nc to replicate an issue wherein portscanner is connecting to an application (service port) and disconnecting ungracefully. The server keeps all these connections alive forever. Is this expected?
It is seen across all tcp applications including cassandra/zookeeper and in house applications.
tcp-ip
asked 3 mins ago
SriramSriram
11
New contributor
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.2 LTS
Release: 14.04
Codename: trusty
Sequence of steps:
Using nc -l 9999 started listening on ubuntu vm.
Ran nc client is on another linux vm to connect to the above server
the interface connecting the client to server is shutdown
The application is not going down even after a long time (few hours)
Is this expected? I am using nc to replicate an issue wherein portscanner is connecting to an application (service port) and disconnecting ungracefully. The server keeps all these connections alive forever. Is this expected?
It is seen across all tcp applications including cassandra/zookeeper and in house applications.
tcp-ip
tcp-ip
asked 3 mins ago
SriramSriram
11
New contributor
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
SriramSriram
11
New contributor
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
SriramSriram
11
New contributor
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 3 mins ago
SriramSriram
11
asked 3 mins ago
SriramSriram
11
11
New contributor
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Sriram is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "89"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sriram is a new contributor. Be nice, and check out our Code of Conduct.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1121032%2ftcp-session-is-not-timing-out-even-when-link-is-shut%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Sriram is a new contributor. Be nice, and check out our Code of Conduct.
Sriram is a new contributor. Be nice, and check out our Code of Conduct.
Sriram is a new contributor. Be nice, and check out our Code of Conduct.
Sriram is a new contributor. Be nice, and check out our Code of Conduct.
Thanks for contributing an answer to Ask Ubuntu!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1121032%2ftcp-session-is-not-timing-out-even-when-link-is-shut%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
EWBHwj7bX90W11HdUCdPdQG,HftvpZRLbSKjJX1ac h1q5a,iirZdHRseUVb1VUzt,w6nJ R5FkEyobHzmzS gJxoflKpg7exH
