openwrt: Use rdate with NTP servers?
Solution 1:
You can supply an rdate source from Unix (Linux) using either inetd or xinetd. The server is built in to both these servers.
Where possible, use ntp as noted above. Your ISP's DNS servers are likely to provide NTP services. These are likely closer on the net than any other servers. As suggested above, you should consider setting up an NTP server on your network.
OpenWRT has an ntp package, and can be uses as your NTP server.
Solution 2:
Most of these public servers still accept TIME requests, the protocol used by rdate.