diff --git a/riot-config.sh b/riot-config.sh
new file mode 100644
index 0000000..b0bc063
--- /dev/null
+++ b/riot-config.sh
@@ -0,0 +1,38 @@
+#!/bin/false
+
+# remotes
+j.remote() {
+    remote=sir0.ibd.ink
+    RET_PORT=${RET_PORT:-36122}
+    RET_USERNAME=${RET_USERNAME:-root}
+    RET_TRUST_SERVER=1
+}
+
+# domains
+i.domain() {
+    RET_HOSTNAME=$host.ibd.ink
+    RET_PORT=${RET_PORT:-12022}
+    RET_USERNAME=${RET_USERNAME:-root}
+    RET_TRUST_SERVER=1
+}
+
+x.domain() {
+    RET_HOSTNAME=ssh.beardic.cn
+    local tmp=$(sha256sum <<< "$host" | tr -cd "[:digit:]")
+    tmp=${tmp:0:4}
+    RET_PORT=$((10#$tmp+36000))
+    RET_USERNAME=root
+    RET_TRUST_SERVER=1
+}
+
+nasp.domain() {
+    RET_HOSTNAME=$host
+    RET_PORT=${RET_PORT:-12022}
+    RET_USERNAME=${RET_USERNAME:-dictxiong}
+    RET_JUMP_SERVER="ssh@nasp.ob.ac.cn:36022"
+    RET_TRUST_SERVER=1
+}
+
+default.domain() {
+    i.domain
+}
diff --git a/scripts/riot b/scripts/riot
index c0720f7..10c7561 100755
--- a/scripts/riot
+++ b/scripts/riot
@@ -4,9 +4,20 @@ THIS_DIR=$( cd "$( dirname "${BASH_SOURCE[0]:-${(%):-%x}}" )" && pwd )
 source "$THIS_DIR/../tools/common.sh"
 RIOT_TRUST_CLIENT=${RIOT_TRUST_CLIENT:-${DFS_TRUST:-0}}
 RIOT_TRUST_SERVER=${RIOT_TRUST_SERVER:-0}
-RIOT_CONFIG_DIR="$THIS_DIR/riot.d"
 RIOT_EXTRA_OPTIONS=""
 
+# config
+RIOT_CONFIG_FILES=(
+    "$DOTFILES/riot-config.sh"
+    "$HOME/.config/riot-config.sh"
+    "riot-config.sh"
+)
+for file in "${RIOT_CONFIG_FILES[@]}"; do
+    if [[ -f "$file" ]]; then
+        source "$file"
+    fi
+done
+
 # check if port number valid
 check_port() {
     ( echo $1 | grep -qxE "[1-9][0-9]{0,4}" ) || return 1
@@ -44,9 +55,9 @@ get_server_meta() {
         check_port $RET_PORT || fmt_fatal invalid port number \"$RET_PORT\"
     fi
     # presets -- match remote
-    local remote_config="$RIOT_CONFIG_DIR/$remote.remote"
-    if [[ -f "$remote_config" ]]; then
-        source "$remote_config"
+    local remote_func="$remote.remote"
+    if is_function "$remote_func"; then
+        "$remote_func"
     fi
     # presets -- match domain
     RET_HOSTNAME=${remote}
@@ -56,13 +67,12 @@ get_server_meta() {
     if [[ "$host" == "$domain" && "$host" != "["*"]" ]]; then
         domain="default"
     fi
-    local root_domain_config="$RIOT_CONFIG_DIR/.domain"
-    if [[ -f "$root_domain_config" ]]; then
-        source "$root_domain_config"
+    if is_function ".domain"; then
+        ".domain"
     fi
-    local domain_config="$RIOT_CONFIG_DIR/$domain.domain"
-    if [[ -n "$$domain" && -f "$domain_config" ]]; then
-        source "$domain_config"
+    local domain_func="$domain.domain"
+    if [[ -n "$domain" ]] && is_function "$domain_func"; then
+        "$domain_func"
     fi
 }
 
diff --git a/scripts/riot.d/default.domain b/scripts/riot.d/default.domain
deleted file mode 120000
index 04cc35d..0000000
--- a/scripts/riot.d/default.domain
+++ /dev/null
@@ -1 +0,0 @@
-./i.domain
\ No newline at end of file
diff --git a/scripts/riot.d/i.domain b/scripts/riot.d/i.domain
deleted file mode 100644
index 6315e28..0000000
--- a/scripts/riot.d/i.domain
+++ /dev/null
@@ -1,4 +0,0 @@
-RET_HOSTNAME=$host.ibd.ink
-RET_PORT=${RET_PORT:-12022}
-RET_USERNAME=${RET_USERNAME:-root}
-RET_TRUST_SERVER=1
\ No newline at end of file
diff --git a/scripts/riot.d/j.remote b/scripts/riot.d/j.remote
deleted file mode 100644
index eb2a647..0000000
--- a/scripts/riot.d/j.remote
+++ /dev/null
@@ -1,4 +0,0 @@
-remote=sir0.ibd.ink
-RET_PORT=${RET_PORT:-36122}
-RET_USERNAME=${RET_USERNAME:-root}
-RET_TRUST_SERVER=1
\ No newline at end of file
diff --git a/scripts/riot.d/nasp.domain b/scripts/riot.d/nasp.domain
deleted file mode 100644
index d33036a..0000000
--- a/scripts/riot.d/nasp.domain
+++ /dev/null
@@ -1,5 +0,0 @@
-RET_HOSTNAME=$host
-RET_PORT=${RET_PORT:-12022}
-RET_USERNAME=${RET_USERNAME:-dictxiong}
-RET_JUMP_SERVER="ssh@nasp.ob.ac.cn:36022"
-RET_TRUST_SERVER=1
\ No newline at end of file
diff --git a/scripts/riot.d/x.domain b/scripts/riot.d/x.domain
deleted file mode 100644
index 8389866..0000000
--- a/scripts/riot.d/x.domain
+++ /dev/null
@@ -1,6 +0,0 @@
-RET_HOSTNAME=ssh.beardic.cn
-local tmp=$(sha256sum <<< "$host" | tr -cd "[:digit:]")
-tmp=${tmp:0:4}
-RET_PORT=$((10#$tmp+36000))
-RET_USERNAME=root
-RET_TRUST_SERVER=1
\ No newline at end of file
diff --git a/tools/common.sh b/tools/common.sh
index ddae15f..2705aca 100755
--- a/tools/common.sh
+++ b/tools/common.sh
@@ -258,6 +258,10 @@ get_free_port() {
     echo $port
 }
 
+is_function() {
+    test "$(type -t "$1")" = "function"
+}
+
 # if bash-ed, else source-d
 if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
     $1 "${@:2}"