diff --git a/documentation/dev-manual/qemu.rst b/documentation/dev-manual/qemu.rst
index 5a4a82ce6..a17c8cead 100644
--- a/documentation/dev-manual/qemu.rst
+++ b/documentation/dev-manual/qemu.rst
@@ -426,6 +426,27 @@ command line:
    networking that does not need root access but also is not as easy to
    use or comprehensive as the default.
 
+   Using ``slirp`` by default will forward the guest machine's
+   22 and 23 ports to host machine's 2222 and 2323, incrementing
+   them if they're already taken by another ``runqemu`` instance.
+   Specific forwarding rules can be configured by
+   setting ``QB_SLIRP_OPT`` in ``qemuboot.conf``.
+   Examples::
+
+      QB_SLIRP_OPT="-netdev user,id=net0,hostfwd=tcp::8080-:80"
+
+      QB_SLIRP_OPT="-netdev user,id=net0,hostfwd=tcp::8080-:80,hostfwd=tcp::2222-:22"
+
+   The first example forwards TCP port 80 from the emulated system to
+   port 8080 on the host system, allowing access to http server running in
+   QEMU from ``http://<host ip>:8080/``
+
+   The second example does the same, but also forwards port 22 to 2222, 
+   allowing ssh access to the emulated system using
+   ``ssh -P 2222 <user>@<host ip>``
+
+   Keep in mind that proper configuration of firewall software is required.
+
 -  ``kvm``: Enables KVM when running "qemux86" or "qemux86-64" QEMU
    architectures. For KVM to work, all the following conditions must be
    met: