[jira] [Commented] (SSHD-993) an additional connection is created when connect to a sshd server
[
https://issues.apache.org/jira/browse/SSHD-993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17108143#comment-17108143
]
Shengdi commented on SSHD-993:
--
I checked the tcpdump, I did see ssh client initiated two connections as you
said. Thanks, i will close this issue.
> an additional connection is created when connect to a sshd server
> -
>
> Key: SSHD-993
> URL: https://issues.apache.org/jira/browse/SSHD-993
> Project: MINA SSHD
> Issue Type: Bug
>Affects Versions: 2.1.0
>Reporter: Shengdi
>Priority: Minor
>
> I used
> SshServer sshd = SshServer.setUpDefaultServer(); to start an sshd server.
>
> When I connect to server with several terminals, and then I keep connect with
> other terminals, then I can probably find the additional ones. This is
> randomly, and most happens after multiple connecting simultaneously or very
> close, then other connect will cause additional connection
> Here is an example,
> I connect with 5 terminals very closely, i found 5 connections with netstat,
> this is correct
> TCP 127.0.0.1:63862 127.0.0.1:12399 ESTABLISHED 4
> TCP 127.0.0.1:63864 127.0.0.1:12399 ESTABLISHED 42764
> TCP 127.0.0.1:63868 127.0.0.1:12399 ESTABLISHED 47036
> TCP 127.0.0.1:63874 127.0.0.1:12399 ESTABLISHED 42516
> TCP 127.0.0.1:63879 127.0.0.1:12399 ESTABLISHED 41704
> But then connect one more time, then i found two connection established this
> time,
> TCP 127.0.0.1:63862 127.0.0.1:12399 ESTABLISHED 4
> TCP 127.0.0.1:63864 127.0.0.1:12399 ESTABLISHED 42764
> TCP 127.0.0.1:63868 127.0.0.1:12399 ESTABLISHED 47036
> TCP 127.0.0.1:63874 127.0.0.1:12399 ESTABLISHED 42516
> TCP 127.0.0.1:63879 127.0.0.1:12399 ESTABLISHED 41704
> {color:#ff}TCP 127.0.0.1:63890 127.0.0.1:12399 ESTABLISHED 35316{color}
> {color:#ff} TCP 127.0.0.1:63891 127.0.0.1:12399 ESTABLISHED 22568{color}
>
> Does anyone have any idea about this? how the additional connection caused?
> Great Thanks
>
> Cheers
> Shengdi
>
>
> ==
> Following is my code example
> ==
>
> {code:java}
> public class SSHServer {
> private SshServer sshd;
> public SSHServer() {
> sshd = SshServer.setUpDefaultServer();
> }
> public void start() throws IOException {
> sshd.setHost("127.0.0.1");
> sshd.setPort(12399);
> sshd.setKeyPairProvider(new MyKeyProvider());
> sshd.setShellFactory(getShellFactory());
> sshd.setPublickeyAuthenticator(new MyAuthenticator());
> sshd.getProperties().put(SshServer.IDLE_TIMEOUT,
> String.valueOf(30));
> // Start SSH server
> sshd.start();
> }
>private Factory getShellFactory() {
> return new Factory() {
> @Override
> public Command create() {
> return new MyShell();
> }
> };
> }
> }
>
> {code}
>
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[jira] [Commented] (SSHD-993) an additional connection is created when connect to a sshd server
[
https://issues.apache.org/jira/browse/SSHD-993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17108067#comment-17108067
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Lyor Goldstein commented on SSHD-993:
-
In any case, I see you are using version 2.1.0 - I recommend upgrading to 2.4.0
(I don't think it has anything to do with this issue, but who knows...)
> an additional connection is created when connect to a sshd server
> -
>
> Key: SSHD-993
> URL: https://issues.apache.org/jira/browse/SSHD-993
> Project: MINA SSHD
> Issue Type: Bug
>Affects Versions: 2.1.0
>Reporter: Shengdi
>Priority: Minor
>
> I used
> SshServer sshd = SshServer.setUpDefaultServer(); to start an sshd server.
>
> When I connect to server with several terminals, and then I keep connect with
> other terminals, then I can probably find the additional ones. This is
> randomly, and most happens after multiple connecting simultaneously or very
> close, then other connect will cause additional connection
> Here is an example,
> I connect with 5 terminals very closely, i found 5 connections with netstat,
> this is correct
> TCP 127.0.0.1:63862 127.0.0.1:12399 ESTABLISHED 4
> TCP 127.0.0.1:63864 127.0.0.1:12399 ESTABLISHED 42764
> TCP 127.0.0.1:63868 127.0.0.1:12399 ESTABLISHED 47036
> TCP 127.0.0.1:63874 127.0.0.1:12399 ESTABLISHED 42516
> TCP 127.0.0.1:63879 127.0.0.1:12399 ESTABLISHED 41704
> But then connect one more time, then i found two connection established this
> time,
> TCP 127.0.0.1:63862 127.0.0.1:12399 ESTABLISHED 4
> TCP 127.0.0.1:63864 127.0.0.1:12399 ESTABLISHED 42764
> TCP 127.0.0.1:63868 127.0.0.1:12399 ESTABLISHED 47036
> TCP 127.0.0.1:63874 127.0.0.1:12399 ESTABLISHED 42516
> TCP 127.0.0.1:63879 127.0.0.1:12399 ESTABLISHED 41704
> {color:#ff}TCP 127.0.0.1:63890 127.0.0.1:12399 ESTABLISHED 35316{color}
> {color:#ff} TCP 127.0.0.1:63891 127.0.0.1:12399 ESTABLISHED 22568{color}
>
> Does anyone have any idea about this? how the additional connection caused?
> Great Thanks
>
> Cheers
> Shengdi
>
>
> ==
> Following is my code example
> ==
>
> {code:java}
> public class SSHServer {
> private SshServer sshd;
> public SSHServer() {
> sshd = SshServer.setUpDefaultServer();
> }
> public void start() throws IOException {
> sshd.setHost("127.0.0.1");
> sshd.setPort(12399);
> sshd.setKeyPairProvider(new MyKeyProvider());
> sshd.setShellFactory(getShellFactory());
> sshd.setPublickeyAuthenticator(new MyAuthenticator());
> sshd.getProperties().put(SshServer.IDLE_TIMEOUT,
> String.valueOf(30));
> // Start SSH server
> sshd.start();
> }
>private Factory getShellFactory() {
> return new Factory() {
> @Override
> public Command create() {
> return new MyShell();
> }
> };
> }
> }
>
> {code}
>
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[jira] [Commented] (SSHD-993) an additional connection is created when connect to a sshd server
[
https://issues.apache.org/jira/browse/SSHD-993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17108054#comment-17108054
]
Lyor Goldstein commented on SSHD-993:
-
I don't think this has anything to do with the server. The server is +passive+
- i.e., it does not initiate connection - only clients do. Therefore I am not
sure how it is the "fault" of the MINA SSHD server. I believe you can confirm
that if you run Wireshark or TCPDUMP to see the connection attempts.
> an additional connection is created when connect to a sshd server
> -
>
> Key: SSHD-993
> URL: https://issues.apache.org/jira/browse/SSHD-993
> Project: MINA SSHD
> Issue Type: Bug
>Affects Versions: 2.1.0
>Reporter: Shengdi
>Priority: Minor
>
> I used
> SshServer sshd = SshServer.setUpDefaultServer(); to start an sshd server.
>
> When I connect to server with several terminals, and then I keep connect with
> other terminals, then I can probably find the additional ones. This is
> randomly, and most happens after multiple connecting simultaneously or very
> close, then other connect will cause additional connection
> Here is an example,
> I connect with 5 terminals very closely, i found 5 connections with netstat,
> this is correct
> TCP 127.0.0.1:63862 127.0.0.1:12399 ESTABLISHED 4
> TCP 127.0.0.1:63864 127.0.0.1:12399 ESTABLISHED 42764
> TCP 127.0.0.1:63868 127.0.0.1:12399 ESTABLISHED 47036
> TCP 127.0.0.1:63874 127.0.0.1:12399 ESTABLISHED 42516
> TCP 127.0.0.1:63879 127.0.0.1:12399 ESTABLISHED 41704
> But then connect one more time, then i found two connection established this
> time,
> TCP 127.0.0.1:63862 127.0.0.1:12399 ESTABLISHED 4
> TCP 127.0.0.1:63864 127.0.0.1:12399 ESTABLISHED 42764
> TCP 127.0.0.1:63868 127.0.0.1:12399 ESTABLISHED 47036
> TCP 127.0.0.1:63874 127.0.0.1:12399 ESTABLISHED 42516
> TCP 127.0.0.1:63879 127.0.0.1:12399 ESTABLISHED 41704
> {color:#ff}TCP 127.0.0.1:63890 127.0.0.1:12399 ESTABLISHED 35316{color}
> {color:#ff} TCP 127.0.0.1:63891 127.0.0.1:12399 ESTABLISHED 22568{color}
>
> Does anyone have any idea about this? how the additional connection caused?
> Great Thanks
>
> Cheers
> Shengdi
>
>
> ==
> Following is my code example
> ==
> public class SSHServer {
> private SshServer sshd;
> public SSHServer() {
> sshd = SshServer.setUpDefaultServer();
> }
> public void start() throws IOException {
> sshd.setHost("127.0.0.1");
> sshd.setPort(12399);
> sshd.setKeyPairProvider(new MyKeyProvider());
> sshd.setShellFactory(getShellFactory());
> sshd.setPublickeyAuthenticator(new MyAuthenticator());
> sshd.getProperties().put(SshServer.IDLE_TIMEOUT, String.valueOf(30));
> // Start SSH server
> sshd.start();
> }
> private Factory getShellFactory() {
> return new Factory() {
> @Override
> public Command create() {
> return new MyShell();
> }
> };
> }
> }
>
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