diff --git a/configs/os/services/kvmd-janus.service b/configs/os/services/kvmd-janus.service
index b928865f..9a154d29 100644
--- a/configs/os/services/kvmd-janus.service
+++ b/configs/os/services/kvmd-janus.service
@@ -7,6 +7,7 @@ Type=oneshot
 ExecStart=/bin/true
 ExecStop=/bin/true
 RemainAfterExit=true
+LimitNOFILE=65536
 
 [Install]
 WantedBy=multi-user.target
diff --git a/configs/os/sysctl.conf b/configs/os/sysctl.conf
index 71db0efc..7cfe43b0 100644
--- a/configs/os/sysctl.conf
+++ b/configs/os/sysctl.conf
@@ -1,3 +1,9 @@
 # https://github.com/raspberrypi/linux/issues/1753
 vm.dirty_background_bytes = 5
 vm.dirty_writeback_centisecs = 25
+
+# https://groups.google.com/g/meetecho-janus/c/xoWIQfaoJm8
+net.core.rmem_default = 500000
+net.core.wmem_default = 500000
+net.core.rmem_max = 1000000
+net.core.wmem_max = 1000000