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TMG "maximum connections rate for a single client host was exceeded"

Posted on 2013-02-07
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Medium Priority
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2,755 Views
Last Modified: 2013-10-14
Hi Experts,

I got a user that have a random problem, sometimes his internet wirks fine, sometimes not..

Logging on TMG i got:

Denied Connection  2/7/2013 10:41:29 AM
Log type: Firewall service
Status: A connection was rejected because the maximum connections rate for a single client host was exceeded.  
Rule: None - see Result Code

Anyone can help me fix it?
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Question by:DELAGIO
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8 Comments
 
LVL 23

Expert Comment

by:Suliman Abu Kharroub
ID: 38864408
His/her machine could be infected, first of all scan it for malwares.

If it is clean, check this:

http://www.isaserver.org/tutorials/TMG-Firewall-Flood-Mitigation-Part1.html
0
 

Author Comment

by:DELAGIO
ID: 38864428
I already did that.

I increased max connections from 600 top 750 and this user stil have problems.
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LVL 23

Accepted Solution

by:
Suliman Abu Kharroub earned 2000 total points
ID: 38864461
Give it 1200 instead of 750.
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Author Comment

by:DELAGIO
ID: 38864467
but is it safe to set a high value like that?
0
 
LVL 23

Expert Comment

by:Suliman Abu Kharroub
ID: 38864497
Thats why I asked to scan the client mahcine first.
0
 

Author Comment

by:DELAGIO
ID: 38913537
Hi, sorry i took so long to respond.

Updated to 1200, scanned for pc virus and its all ok on the client pc, but tmg keeps rejecting its ip after some time.

What we do now?
0
 

Author Comment

by:DELAGIO
ID: 39571838
I ended putting the problematic IP address in the exclusions list.
0
 

Author Closing Comment

by:DELAGIO
ID: 39571840
ok
0

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