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Serveur OpenVPN qui n'arrive pas a revenir

    20 mai 2024 à 19:24:28

    Bonjour,

    j'ai un serveur avec deux cartes réseau :

    ens192:
    IP public 164.x.x.x

    ens224:
    192.168.100.6/24

    Openvpn est installé sur le serveur.

    Le serveur distribue des IPs via l'interface Tun0 dans le réseau 172.16.1.0/24.

    j'arrive bien à me connecter au VPN et avoir une IP du réseau 172.16.1.0/24.

    Le probleme est que j'ai des PCs sur le réseau 192.168.100.0/24 et aucun n'est joignable depuis le VPN.

    Example : Si je me connecte au VPN, depuis l'ip 172.16.1.5 , la requête arrive bien au PC connecté en 192.168.100.10 mais ca bloque sur le retour, le retour n'arrive jamais au PC connecté à mon VPN qui possede l'ip 172.16.1.5

    Pouvez vous m'aider ? 

    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host noprefixroute
           valid_lft forever preferred_lft forever
    2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
        link/ether 00:50:56:0c:53:57 brd ff:ff:ff:ff:ff:ff
        altname enp11s0
        inet 164.x.x.137/24 brd 164.x.x.255 scope global ens192
           valid_lft forever preferred_lft forever
        inet6 fe80::250:56ff:fe0c:5357/64 scope link
           valid_lft forever preferred_lft forever
    3: ens224: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
        link/ether 00:0c:29:ba:5c:0b brd ff:ff:ff:ff:ff:ff
        altname enp19s0
        inet 192.168.100.6/24 brd 192.168.100.255 scope global ens224
           valid_lft forever preferred_lft forever
        inet6 fe80::20c:29ff:feba:5c0b/64 scope link
           valid_lft forever preferred_lft forever
    4: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 500
        link/none
        inet 172.16.1.1 peer 172.16.1.2/32 scope global tun0
           valid_lft forever preferred_lft forever
        inet6 fe80::a427:b941:be:3991/64 scope link stable-privacy
           valid_lft forever preferred_lft forever
    # Which local IP address should OpenVPN
    # listen on? (optional)
    ;local a.b.c.d
    
    # Which TCP/UDP port should OpenVPN listen on?
    # If you want to run multiple OpenVPN instances
    # on the same machine, use a different port
    # number for each one.  You will need to
    # open up this port on your firewall.
    port 1194
    
    # TCP or UDP server?
    ;proto tcp
    proto udp
    
    # "dev tun" will create a routed IP tunnel,
    # "dev tap" will create an ethernet tunnel.
    # Use "dev tap0" if you are ethernet bridging
    # and have precreated a tap0 virtual interface
    # and bridged it with your ethernet interface.
    # If you want to control access policies
    # over the VPN, you must create firewall
    # rules for the the TUN/TAP interface.
    # On non-Windows systems, you can give
    # an explicit unit number, such as tun0.
    # On Windows, use "dev-node" for this.
    # On most systems, the VPN will not function
    # unless you partially or fully disable
    # the firewall for the TUN/TAP interface.
    ;dev tap
    dev tun
    
    # Windows needs the TAP-Win32 adapter name
    # from the Network Connections panel if you
    # have more than one.  On XP SP2 or higher,
    # you may need to selectively disable the
    # Windows firewall for the TAP adapter.
    # Non-Windows systems usually don't need this.
    ;dev-node MyTap
    
    # SSL/TLS root certificate (ca), certificate
    # (cert), and private key (key).  Each client
    # and the server must have their own cert and
    # key file.  The server and all clients will
    # use the same ca file.
    #
    # See the "easy-rsa" directory for a series
    # of scripts for generating RSA certificates
    # and private keys.  Remember to use
    # a unique Common Name for the server
    # and each of the client certificates.
    #
    # Any X509 key management system can be used.
    # OpenVPN can also use a PKCS #12 formatted key file
    # (see "pkcs12" directive in man page).
    ca ca.crt
    cert issued/server1.crt
    key private/server1.key  # This file should be kept secret
    
    # Diffie hellman parameters.
    # Generate your own with:
    #   openssl dhparam -out dh2048.pem 2048
    dh dh.pem
    
    # Network topology
    # Should be subnet (addressing via IP)
    # unless Windows clients v2.0.9 and lower have to
    # be supported (then net30, i.e. a /30 per client)
    # Defaults to net30 (not recommended)
    ;topology subnet
    
    # Configure server mode and supply a VPN subnet
    # for OpenVPN to draw client addresses from.
    # The server will take 10.8.0.1 for itself,
    # the rest will be made available to clients.
    # Each client will be able to reach the server
    # on 10.8.0.1. Comment this line out if you are
    # ethernet bridging. See the man page for more info.
    server 172.16.1.0 255.255.255.0
    
    # Maintain a record of client <-> virtual IP address
    # associations in this file.  If OpenVPN goes down or
    # is restarted, reconnecting clients can be assigned
    # the same virtual IP address from the pool that was
    # previously assigned.
    ifconfig-pool-persist /var/log/openvpn/ipp.txt
    
    # Configure server mode for ethernet bridging.
    # You must first use your OS's bridging capability
    # to bridge the TAP interface with the ethernet
    # NIC interface.  Then you must manually set the
    # IP/netmask on the bridge interface, here we
    # assume 10.8.0.4/255.255.255.0.  Finally we
    # must set aside an IP range in this subnet
    # (start=10.8.0.50 end=10.8.0.100) to allocate
    # to connecting clients.  Leave this line commented
    # out unless you are ethernet bridging.
    ;server-bridge 10.8.0.4 255.255.255.0 10.8.0.50 10.8.0.100
    
    # Configure server mode for ethernet bridging
    # using a DHCP-proxy, where clients talk
    # to the OpenVPN server-side DHCP server
    # to receive their IP address allocation
    # and DNS server addresses.  You must first use
    # your OS's bridging capability to bridge the TAP
    # interface with the ethernet NIC interface.
    # Note: this mode only works on clients (such as
    # Windows), where the client-side TAP adapter is
    # bound to a DHCP client.
    ;server-bridge
    
    # Push routes to the client to allow it
    # to reach other private subnets behind
    # the server.  Remember that these
    # private subnets will also need
    # to know to route the OpenVPN client
    # address pool (10.8.0.0/255.255.255.0)
    # back to the OpenVPN server.
    ;push "route 192.168.10.0 255.255.255.0"
    push "route 192.168.100.0 255.255.255.0"
    
    # To assign specific IP addresses to specific
    # clients or if a connecting client has a private
    # subnet behind it that should also have VPN access,
    # use the subdirectory "ccd" for client-specific
    # configuration files (see man page for more info).
    
    # EXAMPLE: Suppose the client
    # having the certificate common name "Thelonious"
    # also has a small subnet behind his connecting
    # machine, such as 192.168.40.128/255.255.255.248.
    # First, uncomment out these lines:
    ;client-config-dir ccd
    ;route 192.168.40.128 255.255.255.248
    # Then create a file ccd/Thelonious with this line:
    #   iroute 192.168.40.128 255.255.255.248
    # This will allow Thelonious' private subnet to
    # access the VPN.  This example will only work
    # if you are routing, not bridging, i.e. you are
    # using "dev tun" and "server" directives.
    
    # EXAMPLE: Suppose you want to give
    # Thelonious a fixed VPN IP address of 10.9.0.1.
    # First uncomment out these lines:
    ;client-config-dir ccd
    ;route 10.9.0.0 255.255.255.252
    # Then add this line to ccd/Thelonious:
    #   ifconfig-push 10.9.0.1 10.9.0.2
    
    # Suppose that you want to enable different
    # firewall access policies for different groups
    # of clients.  There are two methods:
    # (1) Run multiple OpenVPN daemons, one for each
    #     group, and firewall the TUN/TAP interface
    #     for each group/daemon appropriately.
    # (2) (Advanced) Create a script to dynamically
    #     modify the firewall in response to access
    #     from different clients.  See man
    #     page for more info on learn-address script.
    ;learn-address ./script
    
    # If enabled, this directive will configure
    # all clients to redirect their default
    # network gateway through the VPN, causing
    # all IP traffic such as web browsing and
    # and DNS lookups to go through the VPN
    # (The OpenVPN server machine may need to NAT
    # or bridge the TUN/TAP interface to the internet
    # in order for this to work properly).
    ;push "redirect-gateway def1 bypass-dhcp"
    
    # Certain Windows-specific network settings
    # can be pushed to clients, such as DNS
    # or WINS server addresses.  CAVEAT:
    # http://openvpn.net/faq.html#dhcpcaveats
    # The addresses below refer to the public
    # DNS servers provided by opendns.com.
    ;push "dhcp-option DNS 208.67.222.222"
    ;push "dhcp-option DNS 208.67.220.220"
    
    # Uncomment this directive to allow different
    # clients to be able to "see" each other.
    # By default, clients will only see the server.
    # To force clients to only see the server, you
    # will also need to appropriately firewall the
    # server's TUN/TAP interface.
    ;client-to-client
    
    # Uncomment this directive if multiple clients
    # might connect with the same certificate/key
    # files or common names.  This is recommended
    # only for testing purposes.  For production use,
    # each client should have its own certificate/key
    # pair.
    #
    # IF YOU HAVE NOT GENERATED INDIVIDUAL
    # CERTIFICATE/KEY PAIRS FOR EACH CLIENT,
    # EACH HAVING ITS OWN UNIQUE "COMMON NAME",
    # UNCOMMENT THIS LINE OUT.
    ;duplicate-cn
    
    # The keepalive directive causes ping-like
    # messages to be sent back and forth over
    # the link so that each side knows when
    # the other side has gone down.
    # Ping every 10 seconds, assume that remote
    # peer is down if no ping received during
    # a 120 second time period.
    keepalive 10 120
    
    # For extra security beyond that provided
    # by SSL/TLS, create an "HMAC firewall"
    # to help block DoS attacks and UDP port flooding.
    #
    # Generate with:
    #   openvpn --genkey tls-auth ta.key
    #
    # The server and each client must have
    # a copy of this key.
    # The second parameter should be '0'
    # on the server and '1' on the clients.
    tls-auth ta.key 0 # This file is secret
    
    # Select a cryptographic cipher.
    # This config item must be copied to
    # the client config file as well.
    # Note that v2.4 client/server will automatically
    # negotiate AES-256-GCM in TLS mode.
    # See also the ncp-cipher option in the manpage
    cipher AES-256-CBC
    
    # Enable compression on the VPN link and push the
    # option to the client (v2.4+ only, for earlier
    # versions see below)
    ;compress lz4-v2
    ;push "compress lz4-v2"
    
    # For compression compatible with older clients use comp-lzo
    # If you enable it here, you must also
    # enable it in the client config file.
    comp-lzo
    
    # The maximum number of concurrently connected
    # clients we want to allow.
    ;max-clients 100
    
    # It's a good idea to reduce the OpenVPN
    # daemon's privileges after initialization.
    #
    # You can uncomment this on non-Windows
    # systems after creating a dedicated user.
    ;user openvpn
    ;group openvpn
    
    # The persist options will try to avoid
    # accessing certain resources on restart
    # that may no longer be accessible because
    # of the privilege downgrade.
    persist-key
    persist-tun
    
    # Output a short status file showing
    # current connections, truncated
    # and rewritten every minute.
    status /var/log/openvpn/openvpn-status.log
    
    # By default, log messages will go to the syslog (or
    # on Windows, if running as a service, they will go to
    # the "\Program Files\OpenVPN\log" directory).
    # Use log or log-append to override this default.
    # "log" will truncate the log file on OpenVPN startup,
    # while "log-append" will append to it.  Use one
    # or the other (but not both).
    ;log         /var/log/openvpn/openvpn.log
    ;log-append  /var/log/openvpn/openvpn.log
    
    # Set the appropriate level of log
    # file verbosity.
    #
    # 0 is silent, except for fatal errors
    # 4 is reasonable for general usage
    # 5 and 6 can help to debug connection problems
    # 9 is extremely verbose
    verb 3
    
    # Silence repeating messages.  At most 20
    # sequential messages of the same message
    # category will be output to the log.
    ;mute 20
    
    # Notify the client that when the server restarts so it
    # can automatically reconnect.
    explicit-exit-notify 1




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    On estime à environ 550 millions le nombre d'armes à feu actuellement en circulation. Autrement dit il y a un homme sur douze qui est armé sur cette planète. La seule question c'est … comment armer les onze autres ?

    Serveur OpenVPN qui n'arrive pas a revenir

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