diff --git a/private/server/fastopen_freebsd.go b/private/server/fastopen_freebsd.go
new file mode 100644
index 000000000..1949397aa
--- /dev/null
+++ b/private/server/fastopen_freebsd.go
@@ -0,0 +1,51 @@
+// Copyright (C) 2023 Storj Labs, Inc.
+// See LICENSE for copying information.
+
+package server
+
+import (
+	"os/exec"
+	"strconv"
+	"strings"
+	"sync"
+	"syscall"
+
+	"go.uber.org/zap"
+)
+
+const tcpFastOpen = 1025
+
+func setTCPFastOpen(fd uintptr, _queue int) error {
+	return syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, tcpFastOpen, 1)
+}
+
+var tryInitFastOpenOnce sync.Once
+var initFastOpenPossiblyEnabled bool
+
+// tryInitFastOpen returns true if fastopen support is possibly enabled.
+func tryInitFastOpen(log *zap.Logger) bool {
+	tryInitFastOpenOnce.Do(func() {
+		initFastOpenPossiblyEnabled = true
+		output, err := exec.Command("sysctl", "-n", "net.inet.tcp.fastopen.server_enable").Output()
+		if err != nil {
+			log.Sugar().Infof("kernel support for tcp fast open unknown")
+			initFastOpenPossiblyEnabled = true
+			return
+		}
+		enabled, err := strconv.ParseBool(strings.TrimSpace(string(output)))
+		if err != nil {
+			log.Sugar().Infof("kernel support for tcp fast open unparsable")
+			initFastOpenPossiblyEnabled = true
+			return
+		}
+		if enabled {
+			log.Sugar().Infof("kernel support for server-side tcp fast open enabled.")
+		} else {
+			log.Sugar().Infof("kernel support for server-side tcp fast open not enabled.")
+			log.Sugar().Infof("enable with: sysctl net.inet.tcp.fastopen.server_enable=1")
+			log.Sugar().Infof("enable on-boot by setting net.inet.tcp.fastopen.server_enable=1 in /etc/sysctl.conf")
+		}
+		initFastOpenPossiblyEnabled = enabled
+	})
+	return initFastOpenPossiblyEnabled
+}
diff --git a/private/server/fastopen_other.go b/private/server/fastopen_other.go
index edeb5af07..72a9c3018 100644
--- a/private/server/fastopen_other.go
+++ b/private/server/fastopen_other.go
@@ -1,8 +1,8 @@
 // Copyright (C) 2023 Storj Labs, Inc.
 // See LICENSE for copying information.
 
-//go:build !linux && !windows
-// +build !linux,!windows
+//go:build !linux && !windows && !freebsd
+// +build !linux,!windows,!freebsd
 
 package server