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Add new Tunnel::delay_teredo_confirmation option, default to true.

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This option indicates that the Teredo analyzer should wait until
it sees both sides of a connection using a valid Teredo encapsulation
before issuing a protocol_confirmation.  Previous behavior confirmed
on the first instance of a valid encapsulation, which could result
in more false positives (and e.g. bogus entries in known-services.log).

Addresses #890.
This commit is contained in:
Jon Siwek 2012-10-02 15:13:38 -05:00
parent b4b7a384dc
commit 5f3af9e9eb
11 changed files with 87 additions and 30 deletions
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8
scripts/base/init-bare.bro
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@ -2784,6 +2784,14 @@ export {
## to have a valid Teredo encapsulation.
const yielding_teredo_decapsulation = T &redef;
## With this set, the Teredo analyzer waits until it sees both sides
## of a connection using a valid Teredo encapsulation before issuing
## a :bro:see:`protocol_confirmation`. If it's false, the first
## occurence of a packet with valid Teredo encapsulation causes a
## confirmation. Both cases are still subject to effects of
## :bro:see:`Tunnel::yielding_teredo_decapsulation`.
const delay_teredo_confirmation = T &redef;
## How often to cleanup internal state for inactive IP tunnels.
const ip_tunnel_timeout = 24hrs &redef;
} # end export