Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    Pfsense blocking all but pings to IP addresses

    Scheduled Pinned Locked Moved Problems Installing or Upgrading pfSense Software
    27 Posts 8 Posters 5.4k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • KOMK Offline
      KOM
      last edited by

      Resolver is the default in 2.3, not Forwarder.  Resolver can also work as a forwarder if you check its checkbox.

      1 Reply Last reply Reply Quote 0
      • D Offline
        d4t4str34m
        last edited by

        Here are some notes that I took while poking around trying to figure something out:

        Interface status on WAN
        In out error 0/39
        Collisions 2499

        Pinging by name from firewall diagnostic but not from laptop.

        What is the best way to get the lan and firewall rules configurations off the firewall and uploaded here?

        1 Reply Last reply Reply Quote 0
        • johnpozJ Online
          johnpoz LAYER 8 Global Moderator
          last edited by

          simple screenshot..

          example

          lanrules.jpg
          lanrules.jpg_thumb

          An intelligent man is sometimes forced to be drunk to spend time with his fools
          If you get confused: Listen to the Music Play
          Please don't Chat/PM me for help, unless mod related
          SG-4860 25.07.1 | Lab VMs 2.8, 25.07.1

          1 Reply Last reply Reply Quote 0
          • D Offline
            d4t4str34m
            last edited by

            Lol, easy enough. Should be attached below.

            lan-config.PNG
            lan-config.PNG_thumb
            lan-rules.PNG
            lan-rules.PNG_thumb

            1 Reply Last reply Reply Quote 0
            • KOMK Offline
              KOM
              last edited by

              Those 5 rules you added are useless since all traffic is handled by the Default Allow LAN to Any rules at the bottom.  Nothing in your rules should be interfering with LAN traffic since they're all allow rules.  A default install of pfSense blocks all from WAN and blocks nothing from LAN, so your LAN clients should literally be able to do anything.  Can you post a screen of System - General Setup?

              1 Reply Last reply Reply Quote 0
              • D Offline
                d4t4str34m
                last edited by

                I want to lock it down so I will disable the default allow rule. I want to get it working first though before I mess around with that.

                general.PNG
                general.PNG_thumb

                1 Reply Last reply Reply Quote 0
                • KOMK Offline
                  KOM
                  last edited by

                  I want to lock it down so I will disable the default allow rule. I want to get it working first though before I mess around with that.

                  That's actually the opposite of how you should work on this.  Keep the default Allow All on LAN rules.  Get rid of your custom rules.  Get everything working that you need to get working, then start locking down if that's what you need to do.  Unless you're living with criminals, locking down LAN can be a real exercise in pain.

                  When I try those DNS servers you have listed, they both fail to resolve anything for me but this might be a security issue.  What happens if you replace them with 8.8.8.8, 8.8.4.4?  Are you using the pfSense DNS Resolver or Forwarder?

                  1 Reply Last reply Reply Quote 0
                  • D Offline
                    deajan
                    last edited by

                    Yep, google dns (8.8.8.4 & 8.8.4.4) or opendns (208.67.222.123 & 208.67.220.123).
                    Also, affect those DNS to a gateway.

                    Connect to your pfSense box via ssh and try

                    
nslookup www.google.com

                    What's the output ?

                    NetPOWER.fr - some opensource stuff for IT people

                    1 Reply Last reply Reply Quote 0
                    • D Offline
                      d4t4str34m
                      last edited by

                      I have tried with DNS forwarder enabled and disabled. Results from nslookup using both sets of DNS numbers is below. I also used the ping utility on pfsense and that is below as well. It hits outside IP addresses fine but the only name it hit was google.com. Wouldn't get a reply from cnn.com. I have also attached a screenshot of some of my firewall log.

                      Server: 207.28.65.6
                      Address: 207.28.65.6#53

                      Non-authoritative answer:
                      Name: www.google.com
                      Address: 209.56.124.176
                      Name: www.google.com
                      Address: 209.56.124.166
                      Name: www.google.com
                      Address: 209.56.124.154
                      Name: www.google.com
                      Address: 209.56.124.177
                      Name: www.google.com
                      Address: 209.56.124.163
                      Name: www.google.com
                      Address: 209.56.124.170
                      Name: www.google.com
                      Address: 209.56.124.165
                      Name: www.google.com
                      Address: 209.56.124.144
                      Name: www.google.com
                      Address: 209.56.124.181
                      Name: www.google.com
                      Address: 209.56.124.148
                      Name: www.google.com
                      Address: 209.56.124.185
                      Name: www.google.com
                      Address: 209.56.124.152
                      Name: www.google.com
                      Address: 209.56.124.174
                      Name: www.google.com
                      Address: 209.56.124.187
                      Name: www.google.com
                      Address: 209.56.124.159
                      Name: www.google.com
                      Address: 209.56.124.155

                      Server: 8.8.8.8
                      Address: 8.8.8.8#53

                      Non-authoritative answer:
                      Name: www.google.com
                      Address: 209.56.124.185
                      Name: www.google.com
                      Address: 209.56.124.155
                      Name: www.google.com
                      Address: 209.56.124.166
                      Name: www.google.com
                      Address: 209.56.124.165
                      Name: www.google.com
                      Address: 209.56.124.170
                      Name: www.google.com
                      Address: 209.56.124.177
                      Name: www.google.com
                      Address: 209.56.124.144
                      Name: www.google.com
                      Address: 209.56.124.148
                      Name: www.google.com
                      Address: 209.56.124.187
                      Name: www.google.com
                      Address: 209.56.124.174
                      Name: www.google.com
                      Address: 209.56.124.176
                      Name: www.google.com
                      Address: 209.56.124.159
                      Name: www.google.com
                      Address: 209.56.124.163
                      Name: www.google.com
                      Address: 209.56.124.154
                      Name: www.google.com
                      Address: 209.56.124.152
                      Name: www.google.com
                      Address: 209.56.124.181

                      PING google.com (209.56.124.159): 56 data bytes
                      64 bytes from 209.56.124.159: icmp_seq=0 ttl=61 time=8.028 ms
                      64 bytes from 209.56.124.159: icmp_seq=1 ttl=61 time=7.957 ms
                      64 bytes from 209.56.124.159: icmp_seq=2 ttl=61 time=8.001 ms

                      –- google.com ping statistics ---
                      3 packets transmitted, 3 packets received, 0.0% packet loss
                      round-trip min/avg/max/stddev = 7.957/7.995/8.028/0.029 ms

                      PING cnn.com (157.166.226.26): 56 data bytes

                      --- cnn.com ping statistics ---
                      3 packets transmitted, 0 packets received, 100.0% packet loss

                      firewall-log.png
                      firewall-log.png_thumb

                      1 Reply Last reply Reply Quote 0
                      • KOMK Offline
                        KOM
                        last edited by

                        I was asking if you could replace your DNS servers in System - General Setup with the Google ones.

                        I have tried with DNS forwarder enabled and disabled.

                        pfSense has two built-in DNS services.  I was asking which one you are using.  You shouldn't use both simultaneously.  If you are using DNS Forwarder only and you turn it off then you have no DNS at all.

                        Here is what I would do:

                        • Disable DNS Forwarder.

                        • Enable DNS Resolver.

                        • Check the DNS Query Forwarding checkbox under Services - DNS Resolver - General settings.

                        • Replace your DNS servers under System - General Setup - DNS Server Settings with Google 8.8.8.8 and 8.8.4.4.

                        • Save & test.

                        1 Reply Last reply Reply Quote 0
                        • johnpozJ Online
                          johnpoz LAYER 8 Global Moderator
                          last edited by

                          is this pfsense virtual?

                          Your blocks are OUT of state blocks.. not blocking of syn packets..  Do you have asymmetrical routing issue.  How are you clients connect to pfsense.. And they use pfsense as their only gateway right??

                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                          If you get confused: Listen to the Music Play
                          Please don't Chat/PM me for help, unless mod related
                          SG-4860 25.07.1 | Lab VMs 2.8, 25.07.1

                          1 Reply Last reply Reply Quote 0
                          • D Offline
                            d4t4str34m
                            last edited by

                            Here is what I would do:
                            Disable DNS Forwarder.
                            Enable DNS Resolver.
                            Check the DNS Query Forwarding checkbox under Services - DNS Resolver - General settings.
                            Replace your DNS servers under System - General Setup - DNS Server Settings with Google 8.8.8.8 and 8.8.4.4.
                            Save & test.

                            Tried the DNS resolver and it didn't work. I have changed the dns numbers in the general setup and that didn't work.

                            is this pfsense virtual?

                            Your blocks are OUT of state blocks.. not blocking of syn packets..  Do you have asymmetrical routing issue.  How are you clients connect to pfsense.. And they use pfsense as their only gateway right??

                            It is the pfsense appliance. It is not virtual. The pfsense box is the only gateway. As soon as I unplug pfsense and hook up the old cipa firewall everything works. It has the dns numbers in it that I have given you.

                            1 Reply Last reply Reply Quote 0
                            • D Offline
                              d4t4str34m
                              last edited by

                              For some reason when I plug my pfsense box in, it is doing something to my dns server. I have to manually put a dns address into client machine settings to get dns working and get them on the internet. Machines are getting ip settings properly from my dhcp server but the dns is not working. The dhcp and dns reside on the same server.

                              I just noticed that pfsense works as a dns fine if I put that in my dhcp server to hand out.

                              1 Reply Last reply Reply Quote 0
                              • P Offline
                                phil.davis
                                last edited by

                                I just noticed that pfsense works as a dns fine if I put that in my dhcp server to hand out

                                Well then, pfSense is good.
                                If you have an internal DNS server, and the gateway address of your pfSense LAN side is not the same as the LAN side gateway address of the previous router, then you will have to tell that internal DNS server what is the new way to get to the internet (and thus to resolve external DNS). Once that is working, then your internal DHCP server should be able to give out the internal DNS server IP, and the internal DNS server will successfully lookup all names.

                                (I am guessing a bit about what exactly you have on your internal network and how it all talked before putting pfSense in place)

                                As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
                                If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

                                1 Reply Last reply Reply Quote 0
                                • D Offline
                                  d4t4str34m
                                  last edited by

                                  If you have an internal DNS server, and the gateway address of your pfSense LAN side is not the same as the LAN side gateway address of the previous router, then you will have to tell that internal DNS server what is the new way to get to the internet (and thus to resolve external DNS).

                                  I have it all set up with the same addresses as the last firewall so nothing should have changed. I had a rule for tcp/udp port 53 open for all and I figured that would allow my internal DNS to get DNS info from the net. I disabled all my rules to try and figure out what the issue was. I will start re-enabling them tomorrow and see if I can figure out what is causing the problem.

                                  1 Reply Last reply Reply Quote 0
                                  • D Offline
                                    d4t4str34m
                                    last edited by

                                    So now the issue is my internal DNS server is not getting out. I can ping the IP of the firewall, LAN IP and WAN IP. I cannot ping the WAN gateway IP. I can from the other machines on the network. I cannot figure out why the Mac OD servers are having so many issues.

                                    1 Reply Last reply Reply Quote 0
                                    • T Offline
                                      tim.mcmanus
                                      last edited by

                                      @d4t4str34m:

                                      So now the issue is my internal DNS server is not getting out. I can ping the IP of the firewall, LAN IP and WAN IP. I cannot ping the WAN gateway IP. I can from the other machines on the network. I cannot figure out why the Mac OD servers are having so many issues.

                                      Are you running MacOS X Server and using that as a DNS server?

                                      1 Reply Last reply Reply Quote 0
                                      • D Offline
                                        d4t4str34m
                                        last edited by

                                        Are you running MacOS X Server and using that as a DNS server?

                                        Yes. I ended up adding those machines into the host over ride in the DNS Resolver of pfsense. Now my machines can find the OD server for their accounts while on the network. I am still trying to figure out why it can't get out on the internet.

                                        1 Reply Last reply Reply Quote 0
                                        • T Offline
                                          tim.mcmanus
                                          last edited by

                                          @d4t4str34m:

                                          Are you running MacOS X Server and using that as a DNS server?

                                          Yes. I ended up adding those machines into the host over ride in the DNS Resolver of pfsense. Now my machines can find the OD server for their accounts while on the network. I am still trying to figure out why it can't get out on the internet.

                                          I have a lot of experience with Mac OS X Server.  What's probably happening is that it's making IPv6 DNS queries.  I've complained to Apple engineers that it should do both IPv4 and IPv6, preferably using IPv4 as a default.  But they told me that's the way it's supposed to work.

                                          Check your DNS logs on Mac OS X Server and you should see a lot of these:

                                          24-Jun-2016 00:12:32.030 error (host unreachable) resolving 'ns-1272.awsdns-31.org/A/IN': 2001:500:40::1#53
24-Jun-2016 00:12:32.030 error (host unreachable) resolving 'ns-1272.awsdns-31.org/AAAA/IN': 2001:500:40::1#53
24-Jun-2016 00:12:32.030 error (host unreachable) resolving 'ns-1272.awsdns-31.org/A/IN': 2001:500:f::1#53
24-Jun-2016 00:12:32.030 error (host unreachable) resolving 'ns-1272.awsdns-31.org/AAAA/IN': 2001:500:f::1#53

                                          That's OS X Server trying to do IPv6 lookups and failing.  My ISP doesn't use IPv6, so I had to force OS X Server to do IPv4 lookups, which resolved the issue.

                                          1 Reply Last reply Reply Quote 0
                                          • D Offline
                                            d4t4str34m
                                            last edited by

                                            I don't think that is it. For some reason I can ping all the way through pfsense (LAN and WAN) by ip address from those apple servers but I can't ping the gateway for my WAN. If I plug in the old firewall everything works fine. If I run a traceroute from the apple server to the WAN gateway IP of pfsense, I get a hop from my LAN gateway number and then it stops. It seems to get hung up in the firewall.

                                            1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post
                                            Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.