My effective download speed off most websites is 52+ KB/sec, which is acceptable. However, my VPV connection effective download speed is 5-7 KB/sec. with my firewall and antivirus software shut off. All other users, all using Win XP and braodband, have download speeds of 50+KB/Sec., some as high as 135 KB/Sec.
My connection config is:
Win 2k Client ->Cisco VPN Client v 4.0.03(F)->Westell 2100 WireSpeed Dual Connect Modem->Verizon DSL(ISP)->T1 connection (2Mb/sec -no up/down split)->Cisco PIX 501 firewall with VPN firmware v 6.3(3)
I made the following registry changes that did not help:
HKEY_LOCAL_MACHINE/system/currentcontrolset/control/class/ Cisco Systems VPN Adapter:
DriverDesc, VAMaxMTU = 1000 (it was 1500)
MaxFrameSize of type DWORD = 1000