diff --git a/server-ltt.sh b/server-ltt.sh
index d1bb885..5e8a568 100755
--- a/server-ltt.sh
+++ b/server-ltt.sh
@@ -60,6 +60,8 @@ if [ -z "${xuser}" ]; then
     exit 1
 fi
 
+if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo "Port number must be numeric"; exit 1; fi
+
 XCONF=$xconf
 cat $XCONF |jq --arg port "${port}" '.inbounds +=[{"port":($port|tonumber), "protocol":"vless", "settings":{"clients":[]}}]' |sponge $XCONF
 
diff --git a/server-lttg.sh b/server-lttg.sh
index d930cd7..b88ee9b 100755
--- a/server-lttg.sh
+++ b/server-lttg.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 usage() {
-    echo "Usage: server-gttn <xconf=xray-config-file>,<certpath=cert-path-root>,<port=443>,<domain=mydomain.com>,<user=xxx-xxx[:0[:a@mail.com]]>,<service=svcname>,<gport=65443>"
+    echo "Usage: server-lttg <xconf=xray-config-file>,<certpath=cert-path-root>,<port=443>,<domain=mydomain.com>,<user=xxx-xxx[:0[:a@mail.com]]>,<service=svcname>,<gport=65443>"
 }
 
 options=(`echo $1 |tr ',' ' '`)
@@ -69,6 +69,9 @@ if [ -z "${xuser}" ]; then
     exit 1
 fi
 
+if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo "Port number must be numeric"; exit 1; fi
+if ! [ "${gport}" -eq "${gport}" ] 2>/dev/null; then >&2 echo "Gport number must be numeric"; exit 1; fi
+
 XCONF=$xconf
 cat $XCONF |jq --arg gport "${gport}" '.inbounds +=[{"port":($gport|tonumber), "protocol":"vless", "settings":{"clients":[]}}]' |sponge $XCONF
 
diff --git a/server-lttw.sh b/server-lttw.sh
index 1df759a..125ad47 100755
--- a/server-lttw.sh
+++ b/server-lttw.sh
@@ -69,6 +69,8 @@ if [ -z "${wspath}" ]; then
     exit 1
 fi
 
+if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo "Port number must be numeric"; exit 1; fi
+
 XCONF=$xconf
 cat $XCONF |jq --arg port "${port}" '.inbounds +=[{"port":($port|tonumber), "protocol":"vless", "settings":{"clients":[]}}]' |sponge $XCONF
 
diff --git a/server-ltx.sh b/server-ltx.sh
index 2b61104..30e8927 100755
--- a/server-ltx.sh
+++ b/server-ltx.sh
@@ -60,6 +60,8 @@ if [ -z "${xuser}" ]; then
     exit 1
 fi
 
+if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo "Port number must be numeric"; exit 1; fi
+
 XCONF=$xconf
 cat $XCONF |jq --arg port "${port}" '.inbounds +=[{"port":($port|tonumber), "protocol":"vless", "settings":{"clients":[]}}]' |sponge $XCONF
 
diff --git a/server-mtt.sh b/server-mtt.sh
index 6b8aa10..4ccbe78 100755
--- a/server-mtt.sh
+++ b/server-mtt.sh
@@ -60,6 +60,8 @@ if [ -z "${xuser}" ]; then
     exit 1
 fi
 
+if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo "Port number must be numeric"; exit 1; fi
+
 XCONF=$xconf
 cat $XCONF |jq --arg port "${port}" '.inbounds +=[{"port":($port|tonumber), "protocol":"vmess", "settings":{"clients":[]}}]' |sponge $XCONF
 
diff --git a/server-mttw.sh b/server-mttw.sh
index 5a6e6ba..bf4f9f0 100755
--- a/server-mttw.sh
+++ b/server-mttw.sh
@@ -69,6 +69,8 @@ if [ -z "${wspath}" ]; then
     exit 1
 fi
 
+if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo "Port number must be numeric"; exit 1; fi
+
 XCONF=$xconf
 cat $XCONF |jq --arg port "${port}" '.inbounds +=[{"port":($port|tonumber), "protocol":"vmess", "settings":{"clients":[]}}]' |sponge $XCONF
 
diff --git a/server-ttt.sh b/server-ttt.sh
index ce9bdc0..27ecd1e 100755
--- a/server-ttt.sh
+++ b/server-ttt.sh
@@ -60,6 +60,8 @@ if [ -z "${xuser}" ]; then
     exit 1
 fi
 
+if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo "Port number must be numeric"; exit 1; fi
+
 XCONF=$xconf
 cat $XCONF |jq --arg port "${port}" '.inbounds +=[{"port":($port|tonumber), "protocol":"trojan", "settings":{"clients":[]}}]' |sponge $XCONF
 
diff --git a/server-tttw.sh b/server-tttw.sh
index 9ebbf17..e649370 100755
--- a/server-tttw.sh
+++ b/server-tttw.sh
@@ -69,6 +69,8 @@ if [ -z "${wspath}" ]; then
     exit 1
 fi
 
+if ! [ "${port}" -eq "${port}" ] 2>/dev/null; then >&2 echo "Port number must be numeric"; exit 1; fi
+
 XCONF=$xconf
 cat $XCONF |jq --arg port "${port}" '.inbounds +=[{"port":($port|tonumber), "protocol":"trojan", "settings":{"clients":[]}}]' |sponge $XCONF