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[SOLVED] NTP-Server & Firewall port settings:
I need a little help with this one please? I've been using the NTP-Server add-on on my Duo v.1. for many months now. It serves my Linux boxes beautifully. Anyway, the problem(?): I just modi...
Hi StephenB,
Having thought about it (more sub-consciously than anything) overnight, I think that what actually took away the problem was allowing all outgoing packets on the network. Which I did in the run once setup script - my_ufw.conf.sh
I haven't really looked at it yet, but I'm thinking that the restrictions that I'd placed on the outgoing packets weren't correct.
I did add the following outgoing rules via gufw:
80 TCP = HTTP
53 UDP = DNS
443 TCP = HTTPS
21 TCP = FTP
465 TCP = SMTP
25 TCP = Insecure SMTP
22 TCP = SSH
993 TCP & UDP = IMAP
143 TCP & UDP = Insecure IMAP
9418 TCP = GIT
I had also allowed ntp both incoming & outgoing on port 123 using UDP, but there was that delay...
I guess I could test the theory by scrapping all the current rules & adding the previously mentioned rules via gufw making sure to allow all outgoing packets.
Having thought about it (more sub-consciously than anything) overnight, I think that what actually took away the problem was allowing all outgoing packets on the network. Which I did in the run once setup script - my_ufw.conf.sh
I haven't really looked at it yet, but I'm thinking that the restrictions that I'd placed on the outgoing packets weren't correct.
I did add the following outgoing rules via gufw:
80 TCP = HTTP
53 UDP = DNS
443 TCP = HTTPS
21 TCP = FTP
465 TCP = SMTP
25 TCP = Insecure SMTP
22 TCP = SSH
993 TCP & UDP = IMAP
143 TCP & UDP = Insecure IMAP
9418 TCP = GIT
I had also allowed ntp both incoming & outgoing on port 123 using UDP, but there was that delay...
I guess I could test the theory by scrapping all the current rules & adding the previously mentioned rules via gufw making sure to allow all outgoing packets.
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