Ping time outs on servers behind brigde

  • Hi Guys,

    I have a problem. I have installed pfsense 2.1 amd64 and now i386 to make sure my problem is not software related.

    The situation is : I have a WAN bridged to my DMZ ( because the WAN ip is in the same range of all my servers behind the DMZ)

    When i put one server behind the DMZ all works fine, but when i put serveral servers behind the dmz time outs occur like ping . SO it looks like the more traffic through the pfsense firewall the more problems.

    The bandwith avalailable is 100MB the pfsense uses 2 or 3.

    It looks like if i get over 10000 states the error occurs … in the firewall settings is see this:

    Note: Leave this blank for the default. On your system the default size is: 326000 so that should be oke... ( i tried to change this to 100.000 etc no result)

    Fact is that the more traffic over the pfsense FW the more time out and problems i have....

    Oke what i did;

    reinstalled pfsense 2.1 now with version i386 in stead of amd64.

    After install a added NO Packages.

    I did a WAN -> DMZ setting and i did a LAN setting (3x NIC)

    A added all 3 GitHub rules ( like mentioned before)

    So Setup 1 non busy server behind DMZ looks oke , seconds one (non busy server looks oke) Then a third server with some more traffic and ping loss. more down then up. (load pfsense fw is 0.2)

    If i put only the busier server behind the pfsense all is fine...

    So the busier server behind the SOnicwall again and all goes smootly.

    I did these changes Like steve mentioned in a other topic. :


    and then:

    Have you done this?:


  • Netgate Administrator

    Ok, so just to be sure you did add:


    to /boot/loader.conf.local?


  • yes that is correct… i did that

  • i did that in the new file l/boot/loader.conf.local and these 2 lines are in that


  • @stephenw10 the settings i do with bridge is oke?

    WAN and servers behind the DMZ are in the same range so i have bridged WAN with DMZ. All servers should be available for hosting services.

    WAN cable in WAN connection PFSENSE box (bridge)–> DMZ cable to switch where servers are behind

  • This is the situation now

  • Netgate Administrator

    So that's 3 separate firewalls all configured similarly only one of which is pfSense?
    Are you using static IPs?


  • Correct

    Static ips and several firewall all wan to dmz bridge and only one is pfsense.

    When you setup a bridge in pfsense do you need advanced options setup or somerhing ?

  • Netgate Administrator

    No nothing special.
    You can change where bridge filtering is applied in your case I don't think that would be neccessary. I assume you have WAN set as DHCP, DMZ set as none and bridge0 not assigned?


  • Can the STP setting help when i put that obn WAN and DMZ and give WAN a lower priority?

    No Wan is static ip (for example ) then DMZ is none with Bridge0 and all servers behind them are in the range (also static 20.20.20.x)

    ifconfig looks like this: (changed ip to em0(wan)  em1(dmz) em2 not used em3(lokal ipadres for backup inlog)

    em0: flags=8943 <up,broadcast,running,promisc,simplex,multicast>metric 0 mtu 1500
            options=4209b <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_magic,vlan_hwtso>ether f4:6d:04:9e:36:d0
            inet netmask 0xffff0000 broadcast
            inet6 fe80::f66d:4ff:fe9e:36d0%em0 prefixlen 64 scopeid 0x1
            nd6 options=1 <performnud>media: Ethernet autoselect (100baseTX <full-duplex>)
            status: active
    em1: flags=8943 <up,broadcast,running,promisc,simplex,multicast>metric 0 mtu 1500
            options=4209b <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_magic,vlan_hwtso>ether f4:6d:04:9e:36:d1
            inet6 fe80::f66d:4ff:fe9e:36d1%em1 prefixlen 64 scopeid 0x2
            nd6 options=1 <performnud>media: Ethernet autoselect (100baseTX <full-duplex>)
            status: active
    em2: flags=8c02 <broadcast,oactive,simplex,multicast>metric 0 mtu 1500
            options=4219b <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,tso4,wol_magic,vlan_hwtso>ether f4:6d:04:9e:36:d2
            media: Ethernet autoselect
            status: no carrier
    em3: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
            options=4209b <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_magic,vlan_hwtso>ether f4:6d:04:9e:36:d3
            inet netmask 0xffffff00 broadcast
            inet6 fe80::f66d:4ff:fe9e:36d3%em3 prefixlen 64 scopeid 0x4
            nd6 options=1 <performnud>media: Ethernet autoselect (10baseT/UTP <full-duplex>)
            status: active
    plip0: flags=8810 <pointopoint,simplex,multicast>metric 0 mtu 1500
    enc0: flags=0<> metric 0 mtu 1536
    pflog0: flags=100 <promisc>metric 0 mtu 33192
    lo0: flags=8049 <up,loopback,running,multicast>metric 0 mtu 16384
            options=3 <rxcsum,txcsum>inet netmask 0xff000000
            inet6 ::1 prefixlen 128
            inet6 fe80::1%lo0 prefixlen 64 scopeid 0x8
            nd6 options=3 <performnud,accept_rtadv>pfsync0: flags=0<> metric 0 mtu 1460
            syncpeer: maxupd: 128 syncok: 1
    bridge0: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
            ether 02:7c:9a:3a:65:00
            id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15
            maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200
            root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0
            member: em1 flags=143 <learning,discover,autoedge,autoptp>ifmaxaddr 0 port 2 priority 128 path cost 2000000
            member: em0 flags=143 <learning,discover,autoedge,autoptp>ifmaxaddr 0 port 1 priority 128 path cost 2000000</learning,discover,autoedge,autoptp></learning,discover,autoedge,autoptp></up,broadcast,running,simplex,multicast></performnud,accept_rtadv></rxcsum,txcsum></up,loopback,running,multicast></promisc></pointopoint,simplex,multicast></full-duplex></performnud></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_magic,vlan_hwtso></up,broadcast,running,simplex,multicast></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,tso4,wol_magic,vlan_hwtso></broadcast,oactive,simplex,multicast></full-duplex></performnud></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_magic,vlan_hwtso></up,broadcast,running,promisc,simplex,multicast></full-duplex></performnud></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_magic,vlan_hwtso></up,broadcast,running,promisc,simplex,multicast>

  • Okay,

    i went back to the orginal rc.newwanip

    did only this:

    and added boot/loader.conf.local and these 2 lines are in that



    Under Firewall/ NAT i checked:

    Static route filtering Bypass firewall rules for traffic on the same interfac
    IP Do-Not-Fragment compatibility Clear invalid DF bits instead of dropping the packets

    The servers are timing out a lot less now.

    Maybe once in 30 pings sometimes 2 pings in a row…

    What is see in the logs at that times are tcp:fa / tcp:a from DMZ packages , has that anything to do with that?

    for example:

    Jan 16 14:14:03 DMZ serverip:80   ipadres:50155 TCP:A

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