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The Graveyard - Products No Longer Supported => D-Link NetDefend Firewalls => Topic started by: flbjhb on January 22, 2010, 09:04:45 AM

Title: Problem with DFL-1600
Post by: flbjhb on January 22, 2010, 09:04:45 AM

Hi

I have a few web servers behind a DFL-1600 and noticed that as of approximately 08 January certain users are blocked from accessing the server when trying to post from certain browsers/user agents.
We have changed nothing on the servers or the firewall so are thinking something changed automatically on the firewall.
Does anybody know what can cause a DFL1600 to block certain user-agents for 30-60 seconds (before posting, ping to server works, but as soon as the users in question post their pings time out for 30-60 seconds).

Title: Re: Problem with DFL-1600
Post by: chechito on January 22, 2010, 02:01:02 PM

have some IDP rule active???

ALG appliedto the connections??

Appear some ip on the blacklist ??