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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Sat, 14 Apr 2018 03:59:04 +0200
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Subject: Re: Cannot ping peer 1 from peer 2
To: Vikas <kedia.vikas@gmail.com>
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You may need to run as root:

sysctl net.ipv4.ip_forward=1

You also may want a -o wg0 rule on the FORWARD table, if you don't
also have an established/related rule there.