diff --git a/lib/completion.d/nutools b/lib/completion.d/nutools
index 527d07d..5cdc084 100644
--- a/lib/completion.d/nutools
+++ b/lib/completion.d/nutools
@@ -11,7 +11,7 @@ complete -F __nutools_host_completion -o default uinst ruinst runs rruns
 
 if __bash_completion_module_enabled ssh; then
     shopt -u hostcomplete
-    complete -F _ssh ussh cssh
+    complete -F _ssh ussh cssh mssh
 fi
 
 if __bash_completion_module_enabled umount; then
diff --git a/lib/default/mssh b/lib/default/mssh
new file mode 100644
index 0000000..84ca909
--- /dev/null
+++ b/lib/default/mssh
@@ -0,0 +1,22 @@
+# -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
+
+# Réseaux
+NETWORKS=(
+    ur   # université de la réunion
+    ksct # ks.jclain.fr
+)
+
+ur_INCLUDES=(10/8)
+ur_EXCLUDES=(10.42/16)
+ur_DOMAINS=(univ.run univ-reunion.fr)
+
+ksct_INCLUDES=(192.168.97/24)
+ksct_EXCLUDES=()
+ksct_DOMAINS=(ct)
+
+# Règles de la forme FROM:TO:SSH
+RULES=(
+    :ksct:kssh
+    ur::ssh
+    :ur:fssh
+)
diff --git a/lib/profile.d/git-ssh.userconf b/lib/profile.d/git-ssh.userconf
new file mode 100644
index 0000000..d887ff2
--- /dev/null
+++ b/lib/profile.d/git-ssh.userconf
@@ -0,0 +1,4 @@
+# -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
+
+# Spécifier le client SSH à utiliser pour git
+export GIT_SSH=mssh
diff --git a/mssh b/mssh
new file mode 100755
index 0000000..cd301e2
--- /dev/null
+++ b/mssh
@@ -0,0 +1,107 @@
+#!/bin/bash
+# -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
+source "$(dirname "$0")/lib/ulib/ulib"
+urequire DEFAULTS ipcalc
+
+if [ $# -eq 1 -a "$1" == "--help" ]; then
+    exit_with uecho "$scriptname: Faire une connexion ssh en utilisant l'exécutable approprié au réseau source et destination
+
+USAGE
+    $scriptname [user@]host"
+fi
+
+# fonctions de support
+function match_network() {
+    local ip="$1" network="$2"
+    local -a includes excludes domains
+    local spec
+    array_copy includes "${network}_INCLUDES"
+    array_copy excludes "${network}_EXCLUDES"
+    array_copy domains "${network}_DOMAINS"
+    
+    if ipcalc_checkip "$ip" >/dev/null; then
+        for spec in "${excludes[@]}"; do
+            if ipcalc_match "$ip" "$spec"; then
+                return 1
+            fi
+        done
+        for spec in "${includes[@]}"; do
+            if ipcalc_match "$ip" "$spec"; then
+                return 0
+            fi
+        done
+    else
+        for spec in "${domains[@]}"; do
+            [[ "$ip" == *."$spec" ]] && return 0
+        done
+    fi
+    return 1
+}
+
+# paramètres de l'environnement
+DO=
+if [ "$1" == --debug ]; then
+    # Activer le mode DEBUG
+    shift
+    set_verbosity -D
+elif [ "$1" == --trace ]; then
+    # Activer le mode DEBUG
+    shift
+    set_verbosity -D
+    TRACE=1
+    DO=qvals
+fi
+
+NETWORKS=()
+RULES=()
+set_defaults mssh
+
+# déterminer d'où l'on vient
+from=
+array_from_lines myips "$(ip addr | awk '$1 == "inet" { gsub(/\/.*/, "", $2); print $2 }')"
+for network in "${NETWORKS[@]}"; do
+    for myip in "${myips[@]}"; do
+        if match_network "$myip" "$network"; then
+            from="$network"
+            break
+        fi
+    done
+    [ -n "$from" ] && break
+done
+edebug "FROM: ${from:-ANY} (${myips[*]})"
+
+# analyser la ligne de commande
+vars="$("$scriptdir/ussh" --parse "$@")" || exit 1
+
+[ -n "$TRACE" ] && echo "$vars"
+eval "$vars"
+
+for userhost in "${hosts[@]}"; do
+    # déterminer où l'on veut aller
+    splituserhost "$userhost" user host
+
+    to=
+    for network in "${NETWORKS[@]}"; do
+        if match_network "$host" "$network"; then
+            to="$network"
+            break
+        fi
+    done
+    edebug "TO: ${to:-ANY} ($host)"
+
+    # Sélectionner la commande ssh à utiliser
+    found=
+    for rule in "${RULES[@]}"; do
+        splitfsep "$rule" : rfrom rule2
+        splitfsep "$rule2" : rto rssh
+        if [ \( -z "$rfrom" -o "$from" == "$rfrom" \) -a \
+             \( -z "$rto"   -o "$to" == "$rto" \) ]; then
+            found=1
+            $DO ${exec:+exec} "$rssh" "${options[@]}" "$userhost" "${args[@]}"
+            break
+        fi
+    done
+    if [ -z "$found" ]; then
+        $DO ${exec:+exec} "$ssh" "${options[@]}" "$userhost" "${args[@]}"
+    fi
+done