Blocking SSH - Firewall Rule Troubles - SOLVED
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Recursive – I can ask you for any domain on the planet..
; <<>> DiG 9.9.5-W1 <<>> @64.141.125.254 www.google.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37163
;; flags: qr rd ra; QUERY: 1, ANSWER: 16, AUTHORITY: 0, ADDITIONAL: 1;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.google.com. IN A;; ANSWER SECTION:
www.google.com. 135 IN A 207.34.103.20
www.google.com. 135 IN A 207.34.103.54
www.google.com. 135 IN A 207.34.103.29
www.google.com. 135 IN A 207.34.103.30
www.google.com. 135 IN A 207.34.103.59
www.google.com. 135 IN A 207.34.103.39
www.google.com. 135 IN A 207.34.103.50
www.google.com. 135 IN A 207.34.103.40
www.google.com. 135 IN A 207.34.103.35
www.google.com. 135 IN A 207.34.103.55
www.google.com. 135 IN A 207.34.103.45
www.google.com. 135 IN A 207.34.103.34
www.google.com. 135 IN A 207.34.103.49
www.google.com. 135 IN A 207.34.103.44
www.google.com. 135 IN A 207.34.103.24
www.google.com. 135 IN A 207.34.103.25;; Query time: 69 msec
;; SERVER: 64.141.125.254#53(64.141.125.254)
;; WHEN: Tue Feb 10 16:18:15 Central Standard Time 2015
;; MSG SIZE rcvd: 299You then go look it up for me.. This is can be used for HUGE amplification attacks.. Do you not read the news? ;)
Normally with a transit network, so pfsense interface is not exposed to the any any rule with a downstream router. My point to the any any, is doing so normally exposes stuff that might not of thought of.. Like your web gui to your firewall, ssh, dns, etc.
If you want to continue to use the any any - then create a specific block rule containing all the stuff you don't want to expose for pfsense interface in that segment, and then make sure its applied on the appropriate interfaces where that traffic comes in.
Or make the any any specific to the IPs the customer is using and not true any any.. so like 64.141.125.1 to 249 for example..
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For blocking the services to all of my router interfaces, can I just change the alias you made to include the WAN addresses as well? And any others that I need?
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Sure I read the news, but I get all caught up with all the Kardashian stuff. It's super duper fascinating.
Okay, so I'm working on creating rules right now. For the recursive, just block DNS on the WAN interfaces?
And thanks again. You're a huge life saver here. I really appreciate your time and help.
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Sure you can create an alias to include IPs and ports.. But you could also just change the any any rule you have to not be the full network, make it say 64.141.125.1 to .249.. Now this allows all there stuff to be open.. But the default deny would block access to the IPs you would use on pfsense for say carp, etc. etc.
That is the way I would do it so I was sure not to miss a service or bring up a new services and forget to update the blocking rule.. Always better to have deny deny and anything that is allowed have to have a rule, then to allow a rule that is any any, and now new services are open when they you didn't want them to be.
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Regardless of any FW rules - do you need DNS listening on WAN? If not, then just do not bind it to WAN interfaces.
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Okay, I think your way sounds much better (obviously). How can I make the rule for a range like that? I'm looking…
And no, we don't need to listen for DNS on the WAN - only outbound requests. Although, I don't have DNS Resolver turned on. Or am I missing it somewhere else?
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Alrighty then, I created an alias for those Public IPs that need full access (64.141.125.21-.249), and changed the permit any any rule to the alias as the destination.
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And and a quick test shows can not get to the web gui, and can not query dns. Much better setup
C:>dig @64.141.125.254
; <<>> DiG 9.10-P2 <<>> @64.141.125.254
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached -
Thanks for your help. You rock!!!
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Here to help dude, sometimes I get cranky and rambunctious with some of my wording.. But just here to help people enjoy their pfsense setup as much as I do. Never take anything I say personal, quite often its the beer or bourbon talking as well ;) heheeh
It can get frustrating sometime with same questions over and over and over again with people unwilling to do their own learning and reading. Nice to have a problem other than people with ftp and unbound questions ;)
