Order of processing Question (USG flex 500)

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Emerald
Emerald Posts: 36  Freshman Member
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Hi,
From a course way back with the zywall 50 i thinking that Firewall happens first then the NAT.
Ie if your port translating 444 to 443 you firewall 444 because firewall processes first then nat.

Is this true and where does IDP come in ?

reason i ask :
I have a geo block on all Russian IP addresses, but when i look in IPS logs i see
"SSI:N [type:Sig(130014)] Remote Desktop Protocol brute force attempt"
from a Russian IP address.
I was not expecting to see this as i have a geo block on russia quite high up.
so does IPS happen before my geographic deny rule?

All Replies

  • mMontana
    mMontana Posts: 1,342  Guru Member
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    Take a look on Maintenance -> Packet Flow Explore.
    Maybe the pictures in routing status and SNAT status could be what you're looking for.
  • Emerald
    Emerald Posts: 36  Freshman Member
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    HI thankyou yes i see this but it does not mention IPS in the chain?
  • Zyxel_Cooldia
    Zyxel_Cooldia Posts: 1,462  Zyxel Employee
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    Hi @Emerald,
    Please help to check if the IP is exactly from Russia in GeoIP database.
    You can look up at "Object  > Address/Geo IP > GeoIP".

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