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Forcing unrestricted port for NTPD (ISP Blocks NTP)

Hello all,

My ISP blocks all traffic inbound and outbound on port 123/NTP.

If I login to the UTM console I can successfully run ntpdate if using the -u option (timeout otherwise). Based on ntpq -pn it doesn't look like my UTM is able to reach any of the NTP servers.

Is there a way to do some sort of NAT in UTM so that I force the NTPD requests to use an unrestricted port, or replace NTPD with an alternative that allows for this option such as OpenNTPD.

Thanks!

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0 rfcat_vk over 7 years ago

Your issue does seem very strange considering how many devices rely on accurate time.

Does your ISP offer you an NTP service within their network for general access?

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0 Dave Fl over 7 years ago in reply to rfcat_vk

It does not look like it.

I was able to use chrony and openntpd. Since they operate on the unrestricted port range. I can also use ntpdate -u. Unfortunate ntpd is not going to work.
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0 Dave Fl over 7 years ago in reply to Dave Fl

Can I install a package to replace NTPD on UTM or is that not advised?
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0 rfcat_vk over 7 years ago in reply to Dave Fl

You can try, but I don't think that will work as a long term fix.

The other way would be to use one of your network devices as an NTP source and block all other NTP requests in the firewall.

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0 rfcat_vk over 7 years ago in reply to Dave Fl

You can try, but I don't think that will work as a long term fix.

The other way would be to use one of your network devices as an NTP source and block all other NTP requests in the firewall.

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