View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001528 | unreal | ircd | public | 2004-02-09 19:15 | 2004-02-09 21:47 |
| Reporter | spyderweb | Assigned To | |||
| Priority | normal | Severity | crash | Reproducibility | have not tried |
| Status | closed | Resolution | open | ||
| Summary | 0001528: ddos attack | ||||
| Description | an attacker sending connection attempts at about 20-50 times a second can use up all the servers fd's and cause it to use 100% cpu and not accept any new connections | ||||
| Steps To Reproduce | connect to your server at 20-50 times/sec | ||||
| Additional Information | problem can be solved by firewalling the offending ip ---> output: -saturn.jetirc.net- *** Notice -- Can't allocate fd for socks on [@68.112.154.XXX.2669] -saturn.jetirc.net- *** Notice -- All connections in use. (saturn.jetirc.net[@0.0.0.0.6667]) --> 68.112.154.XXX turns out to be the person ddos'ing us | ||||
| 3rd party modules | |||||
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yes this sometimes happen to us, too by the way at these times they are tring to get q:lined nicks too. |
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You are running an unsupported version of Unreal. current beta, 3.2beta19, should handle this quite ok. Next version, to be released next weekend, will have no problem at all with this... Just to be sure, I just tested it and it never goes above 6% CPU with 10-20 conns/sec (on a p450), and max 14% with 40-50clones/sec... I would say, wait a week, and then look at the site for info on next release. |
