That is very odd indeed and I'm wondering if it is something local if multiple computers are having the issue.

Have you restarted your router?

Can you ping and get a response from the Feathercoin DNS Seed nodes below?

dnsseed.feathercoin.com
dnsseed.fc.altcointech.net
dnsseed.alltheco.in
dnsseed.btcltcftc.com

There is no old copy of Feathercoin online. If you PM me your email address I can mail it to you.