Nmap Announce mailing list archives
RE: Setting nmap host_timeout too low may cause DoS on inetd (?)
From: Jose Nazario <jose () biocserver BIOC CWRU Edu>
Date: Fri, 17 Mar 2000 10:53:36 -0500 (EST)
On Thu, 16 Mar 2000, Alek O. Komarnitsky wrote:
Plus, the more common scenerio is that inetd seems to go into "sleep mode" (ex: telnet's connect but hang) but if I do ANOTHER scan, then it "wakes" back up and all is well. And yes, in a few cases, inetd just dies (but only on the (few) SunOS4.x machines and the HP-UX boxes) - note that "inetd sleeping" occurs on the Solaris boxes.
BSD derived inetd's have looping control built in. they usually log this, "looping too fast", via syslog and then halt operations for a bit. it's a weak form of DoS mitigation, and it works. i don't know the vintage of HPUX inetd, but is it syslogging anything similar to "looping too fast"? my HPUX box is unavailable from my location here, so i can't run strings on it to see if that's built in. jose nazario jose () biochemistry cwru edu PGP fingerprint: 89 B0 81 DA 5B FD 7E 00 99 C3 B2 CD 48 A0 07 80 Public key available at http://biocserver.cwru.edu/~jose/pgp-key.asc
Current thread:
- Setting nmap host_timeout too low may cause DoS on inetd (?) Alek O. Komarnitsky (Mar 15)
- Re: Setting nmap host_timeout too low may cause DoS on inetd (?) Thomas Reinke (Mar 16)
- <Possible follow-ups>
- RE: Setting nmap host_timeout too low may cause DoS on inetd (?) Jones, Greg (Mar 16)
- RE: Setting nmap host_timeout too low may cause DoS on inetd (?) Alek O. Komarnitsky (Mar 16)
- RE: Setting nmap host_timeout too low may cause DoS on inetd (?) Jose Nazario (Mar 17)
- Re: Setting nmap host_timeout too low may cause DoS on inetd (?) LaMont Jones (Mar 17)
- RE: Setting nmap host_timeout too low may cause DoS on inetd (?) Jose Nazario (Mar 17)