Bug 8046 - tftp server refuses connections under high loads
tftp server refuses connections under high loads
Status: CLOSED NOTABUG
Product: Red Hat Linux
Classification: Retired
Component: tftp (Show other bugs)
6.1
All Linux
medium Severity high
: ---
: ---
Assigned To: Bill Nottingham
:
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 1999-12-29 09:37 EST by Joseph W. Breu
Modified: 2014-03-16 22:11 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Environment:
Last Closed: 2000-01-04 09:31:14 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)

  None (edit)
Description Joseph W. Breu 1999-12-29 09:37:59 EST
Under high TFTP loads (approx 5-10 requests per second), the TFTP server
starts to deny requests.

/var/log/messages
-----------------
Dec 29 05:51:31 breu tftpd[2168]: tftpd: trying to get file:
zenith-clone-generic-1.cfg
Dec 29 05:51:31 breu tftpd[2168]: tftpd: serving file from /tftpboot
Dec 29 05:51:33 breu tftpd[2170]: tftpd: trying to get file:
zenith-clone-generic-1.cfg
Dec 29 05:51:33 breu tftpd[2170]: tftpd: serving file from /tftpboot
Dec 29 05:51:33 breu tftpd[2170]: tftpd: read: Connection refused


/etc/inetd.conf
---------------
tftp	dgram	udp	wait.40000	root	/usr/sbin/in.tftpd	in.tftpd
Comment 1 Jeff Johnson 2000-01-04 09:31:59 EST
What tftp version ("rpm -q tftp")?

If tftp-0.16, there is an attempt within the tftpd daemon to prevent DOS
attacks by delaying 0.1 secs between attempts to service a request. This
can be disabled if you desire in the source and recompiling. I'm hard pressed
to imagine a circumstance in which >10 tftp requests/second is generally
useful (read: I don't think that this should be disabled in the distributed
tftp package.)

Note You need to log in before you can comment on or make changes to this bug.