Some experiences regarding the current implementation in AirDC++: Looks like there's at least one user that seems the exceed even the latest block limit of 45 attempts within 30 seconds for incoming connections. The user has fake tag so I assume that the client has been modified so I guess that the error is appropriate in that case.
Connection hickups are a bit trickier. There's a guy with a VPN setup that seems to cause connection cuts (possibly for several minutes). This causes the searches to be received in bursts, triggering the spam warnings (and even the DDoS warning). I'm not sure if there is anything else that can be done than to allow the flood checks to be disabled (or make them adjustable). -- You received this bug notification because you are a member of Dcplusplus-team, which is subscribed to DC++. https://bugs.launchpad.net/bugs/2019497 Title: Handling of CTM/search DDoS triggered by a malicious hub Status in AirDC++: Fix Released Status in DC++: Confirmed Bug description: I've received a few weird crash reports that are both linked to a specific hub (favorite-hub.net): https://github.com/airdcpp-web/airdcpp-webclient/issues/450 https://github.com/airdcpp/airdcpp-windows/issues/63 While inspecting the issue more closely, I noticed that the client receives about 300 search/CTM requests per second from the hub, similar to these: $Search 82.146.38.183:80 F?F?0?1?t $ConnectToMe maksis 82.146.38.183:443 $Search 82.146.38.183:443 F?F?0?1?p $ConnectToMe maksis 82.146.38.183:80 $Search 82.146.38.183:80 F?F?0?1?t $ConnectToMe maksis 82.146.38.183:443 $Search 82.146.38.183:443 F?F?0?1?p $ConnectToMe maksis 82.146.38.183:80 $Search 82.146.38.183:80 F?F?0?1?t $ConnectToMe maksis 82.146.38.183:443 Looks like this has been going on for years already and the client is unable to even report it in a meaningful way. DC++ shows a few status messages about search spam but that doesn't really reveal the full extent of the problem as the aim of the hub is clearly to consume all possible system resources from its users. To manage notifications about this bug go to: https://bugs.launchpad.net/airdcpp/+bug/2019497/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~linuxdcpp-team Post to : linuxdcpp-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~linuxdcpp-team More help : https://help.launchpad.net/ListHelp
