Solved: Initial TCP Sequence Predictable

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Tazz1

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Nov 6, 2011
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I am having a problem passing our security scan. The initial TCP sequence number is predictible (CVE-199-0077). I am using a Zyxel G4100 v2 router. I am guessing that I need to go with a different router since this one will not address the issue and there is no update to resolve it. I have my Hotspot and 3 desktop computers set up on it so I need a router that has 6 ports available. Is there a certain brand that does randomize the TCP sequence numbers?
 
Joined
Sep 21, 2007
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What security scanner are you using ?

I'm no networking genious, but doesn't the initial sequence number gets generated by Windows, or whatever OS you are using? I assume the router just passes them onwards without modifying them? Try hooking up your scanner inside the network and see.
 

Tazz1

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Joined
Nov 6, 2011
Messages
3
Security Metrics is the scan used. NMAP is where I am failing the scan. I have talked with numerous people and I am totally confused. I have the router with DHCP on. I have Access Points connected to the router that is my Hotspot. I was told that my router is assigning the numbers. If I bypass all my WIFI equipment, have the ISP take me out of Bridge Mode and wire Desktop straight into the modem then I pass the scan. This is totally an inconvenience since I don't know when the scans will be ran. It is random. I need a permanent solution.
 
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