version 1.114, 2001/04/11 16:25:31 |
version 1.115, 2001/04/13 22:46:54 |
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should check for new mail for interactive logins. |
should check for new mail for interactive logins. |
The default is |
The default is |
.Dq no . |
.Dq no . |
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.It Cm ClientAliveInterval |
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Sets a timeout interval in seconds after which if no data has been received |
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from the client, |
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.Nm |
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will send a message through the encrypted |
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channel to request a response from the client. This may only be |
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used on a server supporting only protocol version 2. The default |
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is 0, indicating that these messages will not be sent to the client. |
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.It Cm ClientAliveCountMax |
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Sets the number of client alive messages (see above) which may be |
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sent without |
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.Nm |
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receiving any messages back from the client. If this threshold is |
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reached while client alive messages are being sent, |
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.Nm |
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will disconnect the client, terminating the session. It is important |
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to note that the use of client alive messages is very different from |
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Keepalive (below). The client alive messages are sent through the |
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encrypted channel and therefore will not be spoofable. The TCP keepalive |
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option enable by Keepalive is spoofable. You want to use the client |
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alive mechanism when you are basing something important on |
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clients having an active connection to the server. |
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The default is value is 3. If you set ClientAliveInterval |
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(above) to 15, and leave this value at the default, unresponsive ssh clients |
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will be disconnected after approximately 45 seconds. |
.It Cm DenyGroups |
.It Cm DenyGroups |
This keyword can be followed by a number of group names, separated |
This keyword can be followed by a number of group names, separated |
by spaces. |
by spaces. |