diff --git a/recipes-bsp/linux/files/sysmobts-2050/defconfig b/recipes-bsp/linux/files/sysmobts-2050/defconfig
index 6d8712c..672a4d2 100644
--- a/recipes-bsp/linux/files/sysmobts-2050/defconfig
+++ b/recipes-bsp/linux/files/sysmobts-2050/defconfig
@@ -503,6 +503,19 @@ CONFIG_NF_CONNTRACK_FTP=m
 CONFIG_NF_CONNTRACK_SIP=m
 # CONFIG_NF_CONNTRACK_TFTP is not set
 CONFIG_NF_CT_NETLINK=m
+CONFIG_NF_NAT=m
+CONFIG_NF_NAT_IPV4=m
+CONFIG_IP_NF_TARGET_MASQUERADE=m
+CONFIG_IP_NF_TARGET_NETMAP=m
+CONFIG_IP_NF_TARGET_REDIRECT=m
+CONFIG_NF_NAT_PROTO_DCCP=m
+CONFIG_NF_NAT_PROTO_UDPLITE=m
+CONFIG_NF_NAT_PROTO_SCTP=m
+# CONFIG_NF_NAT_AMANDA is not set
+CONFIG_NF_NAT_FTP=m
+# CONFIG_NF_NAT_IRC is not set
+CONFIG_NF_NAT_SIP=m
+# CONFIG_NF_NAT_TFTP is not set
 # CONFIG_NETFILTER_TPROXY is not set
 CONFIG_NETFILTER_XTABLES=m
 
diff --git a/recipes-bsp/linux/files/sysmobts-v1/defconfig b/recipes-bsp/linux/files/sysmobts-v1/defconfig
index c632b7c..444cec4 100644
--- a/recipes-bsp/linux/files/sysmobts-v1/defconfig
+++ b/recipes-bsp/linux/files/sysmobts-v1/defconfig
@@ -511,6 +511,19 @@ CONFIG_NF_CONNTRACK_FTP=m
 CONFIG_NF_CONNTRACK_SIP=m
 # CONFIG_NF_CONNTRACK_TFTP is not set
 CONFIG_NF_CT_NETLINK=m
+CONFIG_NF_NAT=m
+CONFIG_NF_NAT_IPV4=m
+CONFIG_IP_NF_TARGET_MASQUERADE=m
+CONFIG_IP_NF_TARGET_NETMAP=m
+CONFIG_IP_NF_TARGET_REDIRECT=m
+CONFIG_NF_NAT_PROTO_DCCP=m
+CONFIG_NF_NAT_PROTO_UDPLITE=m
+CONFIG_NF_NAT_PROTO_SCTP=m
+# CONFIG_NF_NAT_AMANDA is not set
+CONFIG_NF_NAT_FTP=m
+# CONFIG_NF_NAT_IRC is not set
+CONFIG_NF_NAT_SIP=m
+# CONFIG_NF_NAT_TFTP is not set
 # CONFIG_NETFILTER_TPROXY is not set
 CONFIG_NETFILTER_XTABLES=m
 
diff --git a/recipes-bsp/linux/files/sysmobts-v2/defconfig b/recipes-bsp/linux/files/sysmobts-v2/defconfig
index a4109aa..436f3d2 100644
--- a/recipes-bsp/linux/files/sysmobts-v2/defconfig
+++ b/recipes-bsp/linux/files/sysmobts-v2/defconfig
@@ -516,6 +516,19 @@ CONFIG_NF_CONNTRACK_FTP=m
 CONFIG_NF_CONNTRACK_SIP=m
 # CONFIG_NF_CONNTRACK_TFTP is not set
 CONFIG_NF_CT_NETLINK=m
+CONFIG_NF_NAT=m
+CONFIG_NF_NAT_IPV4=m
+CONFIG_IP_NF_TARGET_MASQUERADE=m
+CONFIG_IP_NF_TARGET_NETMAP=m
+CONFIG_IP_NF_TARGET_REDIRECT=m
+CONFIG_NF_NAT_PROTO_DCCP=m
+CONFIG_NF_NAT_PROTO_UDPLITE=m
+CONFIG_NF_NAT_PROTO_SCTP=m
+# CONFIG_NF_NAT_AMANDA is not set
+CONFIG_NF_NAT_FTP=m
+# CONFIG_NF_NAT_IRC is not set
+CONFIG_NF_NAT_SIP=m
+# CONFIG_NF_NAT_TFTP is not set
 # CONFIG_NETFILTER_TPROXY is not set
 CONFIG_NETFILTER_XTABLES=m
 
diff --git a/recipes-bsp/linux/linux-sysmocom_git.bb b/recipes-bsp/linux/linux-sysmocom_git.bb
index beb4d20..dc5ed16 100644
--- a/recipes-bsp/linux/linux-sysmocom_git.bb
+++ b/recipes-bsp/linux/linux-sysmocom_git.bb
@@ -14,7 +14,7 @@ BTS_FIRMWARE_NAME_sysmobts-2050 = "sysmobts-v2"
 
 SRCREV = "ad70d9a96e62bcdbc184512ae375d5d9b5d318d4"
 
-PR = "r31.3"
+PR = "r31.4"
 PV = "${LINUX_VERSION}+git${SRCPV}"
 
 SRC_URI = "git://git.sysmocom.de/sysmo-bts/linux.git;protocol=git;branch=v3.10 \