From 43e332fc5d3e47382670b5e9bd08f8eab28bafcc Mon Sep 17 00:00:00 2001 From: Tianon Gravi Date: Thu, 3 Dec 2020 10:34:32 -0800 Subject: [PATCH] Add a note about ping/ICMP Closes #17 --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index e5571ca..c26da56 100644 --- a/README.md +++ b/README.md @@ -22,3 +22,5 @@ Note: port 22 will always be mapped (regardless of the contents of `QEMU_PORTS`) For supplying additional arguments, use a command of `start-qemu `. For example, to use `-curses`, one would `docker run ... tianon/qemu start-qemu -curses`. For UEFI support, [the `ovmf` package](https://packages.debian.org/sid/ovmf) is installed, which can be utilized most easily by supplying `--bios /usr/share/ovmf/OVMF.fd`. + +By default, this image will use [QEMU's user-mode networking stack](https://wiki.qemu.org/Documentation/Networking#User_Networking_.28SLIRP.29), which means if you want ping/ICMP working, you'll likely need to also include something like `--sysctl net.ipv4.ping_group_range='0 2147483647'` in your container runtime settings.