WinGate 6.0.4を使っているとofficeのWindowsUpdateに失敗する

パソコン

WinGate 6.0.4を利用しているとofficeのWindowsUpdateが失敗する。ログを見るとホスト名が引けてない。

Requested:	http://download.microsoft.com/download/4/b/c/4bc80d89-0548-40d8-a8ef-8528cf341664/officexp-KB944423-FullFile-JPN.exe
Debug:	WWW Session sending server request in thread 210
Error:	Caught socket exception in CWWWSession::HTTPProcessRequest() Host name lookup for 'download.microsoft.com' failed - terminating

だが、nslookupだと引ける。DNSサーバはWinGateと同じマシン。

c:\>nslookup
Default Server:  wingate.server.co.jp
Address:  192.168.10.2

> download.microsoft.com
Server:  wingate.server.co.jp
Address:  192.168.10.2

Non-authoritative answer:
Name:    a767.ms.akamai.net
Addresses:  203.179.83.13, 203.179.83.12
Aliases:  download.microsoft.com, download.microsoft.com.nsatc.net
          main.dl.ms.akadns.net, intl.dl.ms.akadns.net, dl.ms.d4p.net
          dl.ms.georedirector.akadns.net

ぐぐって見ても解決策がわからない。
それならとWinGateのリゾルバのログをみる。

02/19/08 15:24:23	Request:	request [02cfd640] A lookup "download.microsoft.com."
02/19/08 15:24:23	Request:	request [01f6b008] A lookup "dl.ms.georedirector.akadns.net."
02/19/08 15:24:23	Debug:	selected 192.168.10.2 <IP helper> for request [01f6b008]<1> (best looking)
02/19/08 15:24:23	Debug:	request [01f6b008](ID 6046) sent to 192.168.10.2 <IP helper> (48 bytes)
02/19/08 15:24:23	Request:	request [01f62620] A lookup "dl.ms.d4p.net."
02/19/08 15:24:23	Debug:	selected 192.168.10.2 <IP helper> for request [01f62620]<1> (best looking)
02/19/08 15:24:23	Debug:	request [01f62620](ID 6047) sent to 192.168.10.2 <IP helper> (31 bytes)
02/19/08 15:24:23	Request:	request [0209d390] A lookup "intl.dl.ms.akadns.net."
02/19/08 15:24:23	Debug:	selected 192.168.10.2 <IP helper> for request [0209d390]<1> (best looking)
02/19/08 15:24:23	Debug:	request [0209d390](ID 6048) sent to 192.168.10.2 <IP helper> (39 bytes)
02/19/08 15:24:23	Request:	request [0200e5d0] A lookup "main.dl.ms.akadns.net."
02/19/08 15:24:23	Debug:	selected 192.168.10.2 <IP helper> for request [0200e5d0]<1> (best looking)
02/19/08 15:24:23	Debug:	request [0200e5d0](ID 6049) sent to 192.168.10.2 <IP helper> (39 bytes)
02/19/08 15:24:23	Request:	request [01f56a40] A lookup "download.microsoft.com.nsatc.net."
02/19/08 15:24:23	Debug:	selected 192.168.10.2 <IP helper> for request [01f56a40]<1> (best looking)
02/19/08 15:24:23	Debug:	request [01f56a40](ID 6050) sent to 192.168.10.2 <IP helper> (50 bytes)
02/19/08 15:24:23	Debug:	received block [133] (server 192.168.10.2, port 53)
02/19/08 15:24:23	Debug:	useful response [01f62620](ID 6047) (0.00s)
02/19/08 15:24:23	Debug:	received block [109] (server 192.168.10.2, port 53)
02/19/08 15:24:23	Debug:	useful response [01f6b008](ID 6046) (0.00s)
02/19/08 15:24:23	Debug:	received block [158] (server 192.168.10.2, port 53)
02/19/08 15:24:23	Debug:	useful response [0209d390](ID 6048) (0.00s)
02/19/08 15:24:23	Debug:	received block [177] (server 192.168.10.2, port 53)
02/19/08 15:24:23	Debug:	useful response [0200e5d0](ID 6049) (0.00s)
02/19/08 15:24:23	Debug:	received block [220] (server 192.168.10.2, port 53)
02/19/08 15:24:23	Debug:	useful response [01f56a40](ID 6050) (0.00s)

うーん、なんかわざわざAliasesを引きに行ってなんか失敗してるのかな。いや、失敗もしてないっぽいんだが。
そして最終的にブラウザにWinGateが404を返す。うーん、プロクシってこんな動作だったっけ･･･