Arp error on pfsense



  • Hello
    I don't know in what section I have to post this question, so I posted here, if you need to move it, no probleme.

    I setup a pfsense.
    I'v computer, with motherboard don't handle vt, with 3700+ and 2go ram
    under debian squeeze.

    I'v installed Virtualbox, and install pfsense. I'v 3 network card, two for virtualbox, in direct bridge and the third is for the host (my debian squeeze) and it's not connected for the moment.
    When pfsense boot, it's take control of my two network card, one for the wan, another for the lan.

    I'v livebox (french) to go over internet.

    I sync with git mainline, to resolv tap issue.

    I use openvpn to connect to vpntunnel.se

    I use DE sever and it's fine, yesterday, all goes fine, but this monrning, I'v issue with ARP.

    My network, is simple, it's test network

    WAN -> 192.169.1.199 for psfsense em0
    LAN -> 192.168.1.210 -> em1 (correponding of virtualbox acces)
    gw -> 192.168.1.1

    Wan is use with gw, i connect to pfsense with my computer 192.168.1.219 (static ip)
    No dhcp server on pfsense, just forward dns

    I use two rules to forward ports, and that's it.

    This morning openvnp is down, no way to access internet and in the log

    arpresolve: can't allocate llinfo for 192.168.1.1                                                                                                                                                         
    arpresolve: can't allocate llinfo for 192.168.1.1                                                                                                                                                         
    arpresolve: can't allocate llinfo for 192.168.1.1                                                                                                                                                         
    arp: 7c:03:4c:63:d1:4f attempts to modify permanent entry for 192.168.1.1 on em1                                                                                                                         
    arp: 7c:03:4c:63:d1:4f attempts to modify permanent entry for 192.168.1.1 on em1                                                                                                                         
    arp: 7c:03:4c:63:d1:4f attempts to modify permanent entry for 192.168.1.1 on em1                                                                                                                         
    arpresolve: can't allocate llinfo for 192.168.1.1                                                                                                                                                         
    arpresolve: can't allocate llinfo for 192.168.1.1                                                                                                                                                         
    arpresolve: can't allocate llinfo for 192.168.1.1                                                                                                                                                         
    arpresolve: can't allocate llinfo for 192.168.1.1                                                                                                                                                         
    arpresolve: can't allocate llinfo for 192.168.1.1                                                                                                                                                         
    arpresolve: can't allocate llinfo for 192.168.1.1

    HAve you an idea ?

    Thanks (i'v another two question about my pfsense, but, I know how to post, and want to have on topic for each question)



  • You probably have an invalid configuration: Your pfSense WAN and LAN interfaces need to be on distinct IP subnetworks. You didn't specify network masks so I can't tell for certain.



  • I use 192.168.199 for the wan and .210 for the lan, with 255.255.255.0

    You tell I need to have different subnetwork for lan and wan, why ?

    Something like :

    WAN 192.168.1.199/24
    LAN 192.168.0.210/24

    ?

    Wan have to be in the same subnetwork than the GW, if my gateway is on 192.168.1.1, i need wan on 192.168.0.0 subnetworks ?

    it is correct ?

    ps: thank you ;) I use pfsense no for longer, and my network skill need to be improved ;)



  • It's ok this morning, thank you, I change wan and lan for differents subnetworks

    no arp problem

    If someone can tell my why it's important, for the knowledge ^^

    thanks



  • When deciding which interface to use to send an IP packet, IP software will send the packet on the interface belong to the subnet of the destination (either the ultimate destination or a router which will forward the packet closer to its destination). If you have multiple interfaces belong to the same subnet then it is not well defined which interface will get used (if any).

    There is a Wikipedia article on IP routing which you may find informative.


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