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NO PING after stopping ISA Firewall Services

Last Modified: 2013-12-04
hi folks

i got a strange problem. i thought i could PING NLB-enabled ISA servers after stopping their FWSRV service, but actually not.

basic system information of the ISA servers:

W2K3R2 Standard in Hyper-V
4 NICs with 4 dedicated IPs (1 x external facing, 3 x internal facing)
NLB enabled on all NICs on IGMP multicast mode
additional 17 VIPs assigned to the 4 NICs (10 + 1 + 3 + 3)
ISA 2006 Enterprise with SP1 and Supportability Update
Back Firewall template with Block All
outgoing DNS/HTTP/HTTPS/NTP/PING traffic is allowed

NOTE: ISA Integrated NLB is not used as it does not support NLB on all adapters with IGMP multicast, WLBS used instead.

the network connection is OK as i can use ARP -A to see their MAC addresses though i could not PING the IPs

any clues? many thanks for any input.

kind regards,
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