diff --git a/cmd/yggdrasil/main.go b/cmd/yggdrasil/main.go
index 3ec6414c7..b3cbecf03 100644
--- a/cmd/yggdrasil/main.go
+++ b/cmd/yggdrasil/main.go
@@ -14,6 +14,8 @@ import (
 	"strings"
 	"syscall"
 
+	"suah.dev/protect"
+
 	"github.com/gologme/log"
 	gsyslog "github.com/hashicorp/go-syslog"
 	"github.com/hjson/hjson-go/v4"
@@ -39,6 +41,20 @@ type node struct {
 
 // The main function is responsible for configuring and starting Yggdrasil.
 func main() {
+	// Not all operations are coverable with pledge(2), so immediately
+	// limit file system access with unveil(2), effectively preventing
+	// "proc exec" promises right from the start:
+	//
+	// - read arbitrary config file
+	// - create/write arbitrary log file
+	// - read/write/chmod/remove admin socket, if at all
+	if err := protect.Unveil("/", "rwc"); err != nil {
+		panic(fmt.Sprintf("unveil: / rwc: %v", err))
+	}
+	if err := protect.UnveilBlock(); err != nil {
+		panic(fmt.Sprintf("unveil: %v", err))
+	}
+
 	genconf := flag.Bool("genconf", false, "print a new config to stdout")
 	useconf := flag.Bool("useconf", false, "read HJSON/JSON config from stdin")
 	useconffile := flag.String("useconffile", "", "read HJSON/JSON config from specified file path")
diff --git a/go.mod b/go.mod
index a29090186..5608f5880 100644
--- a/go.mod
+++ b/go.mod
@@ -45,4 +45,5 @@ require (
 	github.com/mattn/go-runewidth v0.0.15 // indirect
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/vishvananda/netns v0.0.4 // indirect
+	suah.dev/protect v1.2.4
 )
diff --git a/go.sum b/go.sum
index d62e2ddbd..061a07691 100644
--- a/go.sum
+++ b/go.sum
@@ -112,3 +112,5 @@ gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gvisor.dev/gvisor v0.0.0-20230927004350-cbd86285d259 h1:TbRPT0HtzFP3Cno1zZo7yPzEEnfu8EjLfl6IU9VfqkQ=
 gvisor.dev/gvisor v0.0.0-20230927004350-cbd86285d259/go.mod h1:AVgIgHMwK63XvmAzWG9vLQ41YnVHN0du0tEC46fI7yY=
+suah.dev/protect v1.2.4 h1:iVZG/zQB63FKNpITDYM/cXoAeCTIjCiXHuFVByJFDzg=
+suah.dev/protect v1.2.4/go.mod h1:vVrquYO3u1Ep9Ez2z8x+6N6/czm+TBmWKZfiXU2tb54=