troubleshooting Question

Forefront TMG Slow Upload Speeds

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rsweezie asked on
Microsoft Forefront ISA Server
16 Comments2 Solutions3868 ViewsLast Modified:
We have several forefront tmg servers connected to a 100mbit v-ethernet fibre connection from our ISP.   Download speeds are always good (25-50mbit), but for some reason, upload speeds from computers behind the TMG firewalls are always much slower (1-5mbit).

The setup is pretty simple - a cisco router manages the connection and is connected to an unmanaged gibabit switch.   The TMG servers also have their external interfaces connected to that switch.   If I plug a notebook into this switch (assigning a public address and bypassing TMG) I get the upload speeds I would expect.    

I've tried manually setting connection speeds, duplex, etc, on the TMG external nics but it hasn't made a difference.  

Also, the tmg servers are from diferent vendors / network cards and all exhibit the same symptom, so it seems like it must be something within TMG.

Any thoughts would be greatly appreciated.

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