On Thu, 11 Aug 2016, Gene Heskett wrote:

> And I just noted that the sysctl command you quoted above is incorrect,
> its sysctl -p, not sysctl.p.

as I indicated yesterday in my 'work-around' posts, the line I got 
which works is:

net.ipv4.tcp_challenge_ack_limit = 99999999

haven't tried it with slashes.

the re-load is

sysctl -p

E. Liddell says it is addressed in kernel 4.7; I'm on an old kernel 
and may fool around with updating it sometime when I have nothing more 
fun to do.

f.

-- 
Felmon Davis

What is food to one, is to others bitter poison.
                 -- Titus Lucretius Carus