question about protocol.encryption's options

[colinhd8]

As we know that encryption options can be set to none (default) or any combination of the following: allow_incoming, try_outgoing, require, require_RC4, enable_retry, prefer_plaintext. My questions are: 1.allow_incoming ->does it mean that accept encrypted connection? drop the encrypted connection if it was not set even require_RC4 was set? 2.try_outgoing ->does it mean that try to use encrypted connection for outgoing? 3. require, require_RC4 ->what's the difference? is it only apply to outgoing? 4.enable_retry ->retry what? plaintest or encryption? only for outgoing? 5.prefer_plaintext -> why no prefer_encryption option? does it mean that use the encrypted connection default? only for outgoing?

Thanks.

[chros73]

All the possibilities :

• are in the context of encrypted connection, as the config directive suggest: protocol.encryption.set
• are flags: that you can apply them with bit-wise or :
  • order of the options isn't important
  • means you can't answer all your question above, until you specify the full (!) config setting
• you can see the result of connection settings on peer screen

That being said:

• 1.yes, that means "accept encrypted connection".
• 2.yes, it mean "try to use encrypted connection for outgoing"
• 3.I don't know, probably the type of encryption; it applies to both incoming/outgoing
• 4.retry encryption; it applies to both incoming/outgoing
• 5." why no prefer_encryption option" I think you already knows the answer now :) ; "does it mean that use the encrypted connection default?" only if it's set; it applies to both incoming/outgoing

Sample settings and their meaning:

# The default value allows incoming encrypted connections, starts unencrypted
# outgoing connections but retries with encryption if they fail, preferring
# plaintext to RC4 encryption after the encrypted handshake
protocol.encryption.set = allow_incoming,prefer_plaintext,enable_retry

# This will only allow encrypted connections
protocol.encryption.set = require,require_RC4

[colinhd8]

@chros73 Thank you so much for your answers. I'll try different settings and see what will happen.