Zentyal Forum, Linux Small Business Server

Zentyal Server => Installation and Upgrades => Topic started by: zoesn on June 30, 2009, 09:55:35 am

Title: Problem with DNS and Firewall
Post by: zoesn on June 30, 2009, 09:55:35 am

Hi,

I am not sure if this is a problem or it is just me that dont understand the firewall settings. The other day i was trying to access www.megavideo.com. The page didn't load. I tried to do an nslookup on the address from my local computer and i got this response

nslookup www.megavideo.com

;; Truncated, retrying in TCP mode.

When i run the same command from a computer not within the network i get a correct response, it also works if i do the same request directly from the ebox server. It seems that the ebox firewall is blocking or not correctly forwarding dns request with the tcp protocol to the local network. In the case of megavideo the size of the package is to large to be sent with udp and therefore the dns requests fails. Hope that someone can confirm this as i am not totally sure of it.

Regards