42 lines
1.3 KiB
Plaintext
42 lines
1.3 KiB
Plaintext
##! Adjust the inactivity timeouts for interactive services which could
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##! very possibly have long delays between packets.
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module Conn;
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export {
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## Define inactivity timeouts by the service detected being used over
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## the connection.
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option analyzer_inactivity_timeouts: table[AllAnalyzers::Tag] of interval = {
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# For interactive services, allow longer periods of inactivity.
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[[Analyzer::ANALYZER_SSH, Analyzer::ANALYZER_FTP]] = 1 hrs,
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};
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## Define inactivity timeouts based on common protocol ports.
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option port_inactivity_timeouts: table[port] of interval = {
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[[21/tcp, 22/tcp, 23/tcp, 513/tcp]] = 1 hrs,
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};
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}
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event analyzer_confirmation_info(atype: AllAnalyzers::Tag, info: AnalyzerConfirmationInfo)
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{
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if ( atype in analyzer_inactivity_timeouts && info?$c )
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set_inactivity_timeout(info$c$id, analyzer_inactivity_timeouts[atype]);
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}
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event connection_established(c: connection)
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{
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local service_port = c$id$resp_p;
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if ( c$orig$state == TCP_INACTIVE )
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{
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# We're seeing a half-established connection. Use the
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# service of the originator if it's well-known and the
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# responder isn't.
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if ( service_port !in likely_server_ports && c$id$orig_p in likely_server_ports )
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service_port = c$id$orig_p;
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}
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if ( service_port in port_inactivity_timeouts )
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set_inactivity_timeout(c$id, port_inactivity_timeouts[service_port]);
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}
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