Isp block incoming port.

Discussion in 'Networking Issues' started by alf5683, Jul 31, 2018.

  1. alf5683

    alf5683 Reformed Router Member


    my ISP block incoming ports so I can't use my nextcloud server when I'm not at home...
    I wondering if I use my personel VPN server (hosted in other place) for connecting my tomato router to my external VPN and use the IP adresse of the VPN to connect nextcloud ?
    If yes, I think I have lot of iptables rules to write on my OpenvPn server ?

    Any idees or advise ?

  2. Sean B.

    Sean B. LI Guru Member

    Sense blocking all incoming ports would make it rather hard for an internet service provider to provide any service, does nextcloud have the option to change the port # it uses?
  3. alf5683

    alf5683 Reformed Router Member

    Yes I can change the port on nextcloud.
    How can I find an open port ? NMAP ?
  4. Sean B.

    Sean B. LI Guru Member

    In the routers web interface under Tools->System Commands running:

    netstat -a
    Will show all port activity. Pick a port that is not currently, or likely to be, used by a service run on the router ( IE, don't use any ports that show up using the command I stated above ). Ports 1 - 1023 are restricted to programs/services there are running as or started by root. 1024 - 65535 are general use allowed. Pick a number in the higher range, and google it if you want to check for any services that commonly use that port. If none, use it.

    Is any of this "nextcloud" setup you use running on the router itself? Or is the client or server simply behind the router? If not running on router itself, don't forget to add port forward rules to direct the chosen incoming port to the device behind the router.
    Last edited: Aug 1, 2018
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