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  • Committer: Peter Müller
  • Date: 2022-04-23 14:27:56 UTC
  • mto: This revision was merged to the branch mainline in revision 9750.
  • Revision ID: git-v1:7a981d94cb2c3e48ecaf07c506c8353a2c839d79
SSH: do not send spoofable TCP keep alive messages

By default, both SSH server and client rely on TCP-based keep alive
messages to detect broken sessions, which can be spoofed rather easily
in order to keep a broken session opened (and vice versa).

Since we rely on SSH-based keep alive messages, which are not vulnerable
to this kind of tampering, there is no need to double-check connections
via TCP keep alive as well.

This patch thereof disables using TCP keep alive for both SSH client and
server scenario. For usability reasons, a timeout of 5 minutes (10
seconds * 30 keep alive messages = 300 seconds) will be used for both
client and server configuration, as 60 seconds were found to be too
short for unstable connectivity scenarios.

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>

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etc/mc/filehighlight.ini
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etc/mc/mc.default.keymap
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etc/mc/mc.emacs.keymap
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etc/mc/mc.ext.ini
 
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etc/mc/mc.ext
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etc/mc/mc.keymap
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etc/mc/mc.menu
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etc/mc/mcedit.menu
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usr/share/mc/syntax/aspx.syntax
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usr/share/mc/syntax/assembler.syntax
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usr/share/mc/syntax/awk.syntax
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usr/share/mc/syntax/b.syntax
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usr/share/mc/syntax/c.syntax
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usr/share/mc/syntax/cabal.syntax
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usr/share/mc/syntax/changelog.syntax
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usr/share/mc/syntax/php.syntax
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usr/share/mc/syntax/po.syntax
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usr/share/mc/syntax/povray.syntax
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usr/share/mc/syntax/privoxy.syntax
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usr/share/mc/syntax/procmail.syntax
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usr/share/mc/syntax/properties.syntax
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usr/share/mc/syntax/protobuf.syntax
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usr/share/mc/syntax/syntax.syntax
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usr/share/mc/syntax/tcl.syntax
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usr/share/mc/syntax/texinfo.syntax
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usr/share/mc/syntax/toml.syntax
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usr/share/mc/syntax/ts.syntax
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usr/share/mc/syntax/tt.syntax
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usr/share/mc/syntax/unknown.syntax