Re: ntpd sendto: Can't assign requested address
Am 2012-01-13 18:42, schrieb fe...@banane.de.vc: Hello, I run OpenBSD 5.0 (amd64) with ntpd. About 5 to 10 times a day, it logs errors like the following to /var/log/messages and /var/log/daemon: Jan 11 02:04:53 abc ntpd[26588]: sendto: Can't assign requested address /etc/ntpd.conf: listen on * server ptbtime2.ptb.de server ptbtime3.ptb.de This box is part of the ntp pool (www.pool.ntp.org) so it gets about 10 ntp querys per second on average, occasionally many more. What to do? Thanks feily Hello, (one year later:) on my poolserver i saw this message 50+ per hour. Today i found that they were caused by clients connecting with source port 0. I don't think that this are valid connections, after blocking them with pf the ntpd warnings are gone. Greetings Stefan
Re: ntpd sendto: Can't assign requested address
On 2013-02-10, Stefan Sieg stefan.s...@gmx.de wrote: on my poolserver i saw this message 50+ per hour. Today i found that they were caused by clients connecting with source port 0. I don't think that this are valid connections, after blocking them with pf the ntpd warnings are gone. IIRC old versions of firewall/1 will protect you from this by crashing :-) They are probably from crappy IP stacks on embedded systems (routers etc). Port 0 is reserved and shouldn't be used.
Re: ntpd sendto: Can't assign requested address
* fe...@banane.de.vc fe...@banane.de.vc [2012-01-13 18:43]: I run OpenBSD 5.0 (amd64) with ntpd. About 5 to 10 times a day, it logs errors like the following to /var/log/messages and /var/log/daemon: Jan 11 02:04:53 abc ntpd[26588]: sendto: Can't assign requested address that's sendto(2) returning EADDRNOTAVAIL. without having checked wether that actually is the error returned in this case... This box is part of the ntp pool (www.pool.ntp.org) so it gets about 10 ntp querys per second on average, occasionally many more. ..but could you simply run out of port space? if so, playing with sysctl net.inet.ip.port* should help. -- Henning Brauer, h...@bsws.de, henn...@openbsd.org BS Web Services, http://bsws.de, Full-Service ISP Secure Hosting, Mail and DNS Services. Dedicated Servers, Root to Fully Managed Henning Brauer Consulting, http://henningbrauer.com/
