Thread Info
  • State Not Answered
  • Locked Locked
  • Replies 53 replies
  • Subscribers 2 subscribers
  • Views 48498 views
  • Users 0 members are here
Options
Suggested
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Firewall fails to block an established UDP connection...

GreatByte
Hello Guys,

I am have a weird situation here. I have a PC communicating with a server, both connected to my Sophos Firewall (Firmware: 9.100-16 - not an appliance).

I have a Rule that allows this connection, and it works. Without that Rule, the connection cannot be established. So far so good.
Once established, however, the communication continues even if I disable that rule, or add a rule above it to block that connection. [:S]
It just keeps on working and there doesnt seem to be a way to block it if I wanted to...

I tried it using a PC connected via the Internet and I can even disable the DNat Rule and the connection still continues. Only new connections are being blocked. Is this an expected behavior? Doesnt seem right to me.

Greatbyte


This thread was automatically locked due to age.
Parents
  • 0
    Hmm... Didnt find that thread prior to posting. But I didnt think it would be a timeout thing.

    I change the Rules to block something, and it doesnt - I dont see why it would wait for a timeout before enforcing the Rules. Why would there be a timeout if packets keep on coming in the first place?

    I definitly waited for more than 30 seconds.. A couple of minutes for sure...

    Greatbyte
Reply
  • 0
    Hmm... Didnt find that thread prior to posting. But I didnt think it would be a timeout thing.

    I change the Rules to block something, and it doesnt - I dont see why it would wait for a timeout before enforcing the Rules. Why would there be a timeout if packets keep on coming in the first place?

    I definitly waited for more than 30 seconds.. A couple of minutes for sure...

    Greatbyte
Children
No Data
Unfiltered HTML