Nmap Announce mailing list archives
Re: Setting nmap host_timeout too low may cause DoS on inetd (?)
From: Thomas Reinke <reinke () e-softinc com>
Date: Thu, 16 Mar 2000 23:28:38 -0500
[snip]
A few percent of the scanned machines end up with a "hanging" inetd; so inbound telnet/etc. connections are no longer accepted. Interestingly enough, one can often "clear" it by doing another scan to just the targeted host. And on a few machines, inetd flatout died - so then you are basically hosed! Sun Bug ID4260432 describes a situation somewhat similar to this ... but the problem in not repeatable in any way ... the vast majority of the time; the scan just finishes and we are all happy.
[snip]
Does any of this make sense and/or sound familier to people? Thanx, alek
Yup, this is familiar. We ran into this problem with a free nmap based scanning service we run on the web. Same sort of problem: a full TCP connect scan would leave the remote Solaris system in an unusable state. Never did identify the root cause though...nice to see the Bug ID. -- ------------------------------------------------------------ Thomas Reinke Tel: (905) 331-2260 Director of Technology Fax: (905) 331-2504 E-Soft Inc. http://www.e-softinc.com SecuritySpace http://www.securityspace.com
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)