Cannot upload files or do upload tests



  • Hi all,

    I have pfsense behind an asus dsl wifi router running as my internet gateway for all my wifi devices.
    I am having an issue where I Cannot upload any files or conduct any upload tests, but all other traffic seems to work fine.

    My setup is as follows (see attached)

    WAN router (asus).
    Public: 123.x.x.x
    Lan: 192.168.1.1
    DHCP Subnet: 192.168.1.0/24 (pool .2 - .254)
    DHCP Gateway: 192.168.1.2 (pfsense)

    PfSense
    WAN: 192.168.1.2
    LAN: 192.168.1.202

    I only have 1 firewall rule on my LAN interface
    Allow Any/Any

    A few details:

    • The end game is to use PFsense as a VPN endpoint and firewall for wireless devices
    • Web traffic appears to work, but I cannot upload images, files or run an upload speed test. (download test works fine).
    • ASUS wan router is my modem too.
      **- Very small files WILL upload approx up to 50-64kb
    • If I disable packet filtering on pfsense, everything works.**
    • I have tried disabling outbound NAT

    Can any one help me solve this? I dont know what else to try :)
    Thank you!






  • I'd venture to guess it probably has something to do with having both the wan and lan on the same subnet.
    Also you really should put the asus modem/router into bridge mode and avoid that double nat.



  • asymmetric routing. You have your WAN and LAN on the same subnet. The response packets never go through the router and pfSense drop the state after never seeing a reply. The reason it does after 64KiB is that's the TCP send window before the state dies.



  • @Harvy66:

    asymmetric routing. You have your WAN and LAN on the same subnet. The response packets never go through the router and pfSense drop the state after never seeing a reply. The reason it does after 64KiB is that's the TCP send window before the state dies.

    Thanks for the replies. So this sounds right… Anyway I can avoid this?
    My only concern is if I create a new subnet on the pfsense for the lan interface, I will not be able to pass my wifi traffic to it?

    Do i need a bridge interface between pfsense and the wifi router perhaps?



  • You should never have more than one subnet per broadcast domain and each interface should be a different subnet.


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