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Editorial Team
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Asked: 2026-05-14T21:24:16+00:00

I have one server running memcached and another server that should be able to

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I have one server running memcached and another server that should be able to connect to the memcached server.

memcached is set up to listen to 0.0.0.0:5666

This allows for anyone to connect to it so i want to block the port 5666 for everyone except the other server. I thought this would do it:

iptables -A INPUT -p tcp --dport 5666 -j REJECT
iptables -A INPUT -p tcp -s 79.xxx.xxx.xxx --dport 5666 -j ACCEPT

But it did not, now i can not connect at all from the other server, before it worked fine.

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1 Answer

  1. Editorial Team

    iptables rules are evaluated in the order that they’re given. Just switch the order of those two lines.

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