Any way to easily enable Freebind/Transparent/AnyIP for listeners?

<p>I&#39;m trying to setup some http listeners and such to listen on IPs that are not explicitly bound to an interface but Go does not seem to support it. Specifically it&#39;s for IPv6 addresses. So if I was assigned <code>aaaa:bbbb:cccc:dddd::/64</code> I would like to be able to just specify any IP in that range without having to add it via command ( <code>ip -6 addr add</code>) or on the interface itself ( <code>/etc/sysconfig/network-scripts/ifcfg-ETH</code>)</p> <p>I have added the route using <code>ip -6 route add local aaaa:bbbb:cccc:dddd::/64 dev lo</code> and they are accessible via <code>ping6</code>. When using go to setup an http server on an address in that range it throws back a <code>could not bind</code> error.</p> <p>I have found some hacky (and probably error prone) ways to potentially do this but maybe I&#39;m missing something? Is there perhaps some setting or arguments I can pass in somewhere to get this done rather than deal with syscalls and modifying the socket directly or worse and modify the core Go networking code?</p> <hr/>**评论：**<br/><br/>nemith: <pre><p>This really isn&#39;t a Go issue. It more of a kernel issue which is why, like you said, twiddling with syscalls and modifying the socket is required. You need to tell the kernel what to send into the socket.</p> <p>A alternative may just be using a redirection rule in IPtable/nftables to redirect all traffic to a certain port on any IP address to your regular Go socket.</p></pre>shamunrr: <pre><blockquote> <p>This really isn&#39;t a Go issue. It more of a kernel issue which is why </p> </blockquote> <p>Go is what sets up the sockets and listeners so it has to be setup through Go and before the server starts.</p> <blockquote> <p>A alternative may just be using a redirection rule in IPtable/nftables to redirect all traffic to a certain port on any IP address to your regular Go socket. </p> </blockquote> <p>That is actually a possible solution I hadn&#39;t thought of, granted probably not as performant as a direct Go implementation. Thanks!</p></pre>tv64738: <pre><p>Leave host empty and it&#39;ll listen on all local IPs. The rest is not a Go question.</p></pre>shamunrr: <pre><p>This is a Go question, and your answer does not fit my issue. If I leave it as <code>::</code> it will listen on all assigned addresses. That is not what I want. It needs to listen on an unassigned address.</p></pre>