bind9 using UDP ports 50548, 50549

[thedaver]

I'm really frustrated with my FC4 implementation of named/bind9. I cannot find out what named is doing listening to UDP 50548 and UDP 50549.

I have an opinion that this is a notifier service thing between named servers for zones, but I cannot figure it out.

lsof -Pni

named    6273  named   20u  IPv4 63046053       UDP 127.0.0.1:53
named    6273  named   21u  IPv4 63046054       TCP 127.0.0.1:53 (LISTEN)
named    6273  named   22u  IPv4 63046055       UDP [publicIP]:53
named    6273  named   23u  IPv4 63046056       TCP [publicIP]:53 (LISTEN)
named    6273  named   24u  IPv4 63046057       UDP *:50548
named    6273  named   25u  IPv6 63046058       UDP *:50549

What is named doing on these two ports? Why? And how do I shut it off?!

Thanks!
D.

D.E.R. Management - IT Project Management Consulting

http://www.dermanagement.com/

 

[BoldyBald]

Hi TheDaver,

Those ports are needed if named doesn't know the answer and wants to ask other nameservers.

You can modify it's behaviour with "avoid-v4-udp-ports" and "query-source address". I wouldn't know how to shut it off completely.

Good luck

 

[thedaver]

BoldyBald;
Looks like you're right, those would allow me to shuffle the cards a bit to move services elsewhere. I'll keep looking. Thanks!

D.E.R. Management - IT Project Management Consulting

http://www.dermanagement.com/