Voir la liste des ports ouverts sur Windows

Avril 2013

Les ports sont utilisés pour pouvoir gérer plusieurs connexions sur un même ordinateur. On pourrait comparer les ports d'une interface réseau aux quais d'une gare.

Pour savoir quels sont les ports ouverts sur un windows, on peut utiliser cette ligne de commande (dans cmd.exe) :

netstat -ano

Vous obtiendrez alors la liste des ports utilisés, avec le pid du processus concerné sur la dernière colonne :

C:\Users\Vincent>netstat -ano

Connexions actives

  Proto  Adresse locale         Adresse distante       État
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       5100
  TCP    0.0.0.0:135            0.0.0.0:0              LISTENING       768
  TCP    0.0.0.0:49157          0.0.0.0:0              LISTENING       520
  TCP    0.0.0.0:49160          0.0.0.0:0              LISTENING       3024
  TCP    127.0.0.1:63098        127.0.0.1:63099        ESTABLISHED     5772
  TCP    127.0.0.1:63099        127.0.0.1:63098        ESTABLISHED     5772
  TCP    192.168.1.30:139       0.0.0.0:0              LISTENING       4
  TCP    192.168.1.30:51385     198.252.206.25:80      ESTABLISHED     5772
  TCP    192.168.1.30:51541     67.228.168.221:80      ESTABLISHED     5772
  TCP    192.168.1.30:51710     193.104.215.61:80      CLOSE_WAIT      2460
  TCP    192.168.72.1:139       0.0.0.0:0              LISTENING       4
  TCP    192.168.241.1:139      0.0.0.0:0              LISTENING       4
  TCP    [::]:135               [::]:0                 LISTENING       768
  TCP    [::]:49160             [::]:0                 LISTENING       3024
  UDP    0.0.0.0:500            *:*                                    1000
  UDP    0.0.0.0:3702           *:*                                    972
  UDP    0.0.0.0:3702           *:*                                    1800
  UDP    0.0.0.0:64750          *:*                                    972
  UDP    127.0.0.1:1900         *:*                                    1800
  UDP    127.0.0.1:57592        *:*                                    1800
  UDP    192.168.1.30:137       *:*                                    4
  UDP    192.168.241.1:138      *:*                                    4
  UDP    192.168.241.1:1900     *:*                                    1800
  UDP    192.168.241.1:57590    *:*                                    1800

Pour connaître le nom du processus correspondant à un PID, utilisez le gestionnaire de tâches (Ctrl + Alt + Suppr), onglet Processus.

CurrPorts : un logiciel pour voir les ports ouverts

La ligne de commande c'est pas très pratique à utiliser, si vous ne souhaitez pas l'utiliser, vous pouvez télécharger un logiciel qui fait la même chose que la commande netstat, mais avec une interface graphique :

Télécharger Cports (Nirsoft)

Allez donc jeter un oeil sur cette page : supprimer un lien hypertexte cliquable dans excel.

CurrPorts : liste des ports utilisés

On peut même filtrer les résultats sur le protocole (TCP ou UDP), et en fonction du processus rattaché :

  • exclude:both:udp : exclure l'UDP
  • exclude:process:System : exclure les processus du système d'exploitation

Allez donc jeter un oeil sur cette page : dessiner un gâteau.

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