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Unable to block HTTPS sites in InterScan Web Security Virtual Appliance (IWSVA) even if HTTPS Decryption is enabled

    • Updated:
    • 28 May 2015
    • Product/Version:
    • InterScan Web Security Virtual Appliance 6.0
    • InterScan Web Security Virtual Appliance 6.5
    • Platform:
    • Bare Metal N/A
Summary

Users cannot block HTTPs sites. For example, when browsing Facebook via http://www.facebook.com, the page is blocked, however, when browsing via https://www.facebook.com, the page loads.

The HTTPS logs confirmed that https://www.facebook.com is not blocked:

15:12:27.305 <DBG><127:7433:7466> <C:2484> (postconnect) m_fullURI is https://www.facebook.com:443/ @<ProcessRequestURI> @@<IWSSHttpProxyProtocol.cpp:10473>
15:12:27.305 <DBG><127:7433:7466> <C:2484> DoPreScan: msgtype is 1 @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7163>
15:12:27.305 <DBG><127:7433:7466> <C:2484> pState->m_RequestedHost: www.facebook.com, pState->m_RequestedPort: 443, pState->m_RequestedPath: /, pState->m_fullURI: https://www.facebook.com:443/, pState->m_SSLState: 2, pState->m_State: 0 @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7187>
15:12:27.305 <DBG><127:7433:7466> <C:2484> HTTPS: will check Iwss Host name 192.168.115.10:9091 and the url www.facebook.com:443 @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7379>
15:12:27.305 <DBG><127:7433:7466> <C:2484> Get the IP info from cache. IP(31.13.91.2) @<ResolveFromDNSCache> @@<IWSSHttpProxyProtocol.cpp:9706>
15:12:27.305 <DBG><127:7433:7466> <C:2484> From Cache: Host resolution: www.facebook.com = 31.13.91.2 @<ResolveFromDNSCache> @@<IWSSHttpProxyProtocol.cpp:9717>
15:12:27.305 <DBG><127:7433:7466> <C:2484> The hit from Cache is 28496674 the total access is (29157737) @<ResolveFromDNSCache> @@<IWSSHttpProxyProtocol.cpp:9721>
15:12:27.305 <DBG><127:7433:7466> <C:2484> is_connect_method: 1, pCCache->isTransparent: 0,pState->m_bSkingHttpsScanRequestIsIwssServer: 0 @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7443>
15:12:27.305 <DBG><127:7433:7466> <C:2484> HTTPS:Check server port ACL for www.facebook.com port 443 @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7493>
15:12:27.305 <DBG><127:7433:7466> <C:2484> DCS is disabled @<isIpExistsInSpywareIpList> @@<ScanContextImpl.cpp:2795>
15:12:27.305 <DBG><127:7433:7466> <C:2484> isIpExistsInSpywareIpList return result: 1 @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7740>
15:12:27.305 <DBG><127:7433:7466> <C:2484> before DoPreScan: msgtype: 5, URI: https://www.facebook.com:443/ @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7789>
15:12:27.305 <DBG><127:7433:7466> <C:2484> PreScanState: TmScanState::PS_START @<DoPreScan> @@<ScanContextImpl.cpp:869>
15:12:27.305 <DBG><127:7433:7466> <C:2484> PreScanState: TmScanState::PS_TRANSACTION_LOG @<DoPreScan> @@<ScanContextImpl.cpp:873>
15:12:27.305 <DBG><127:7433:7466> <C:2484> PreScanState: TmScanState::PS_ACCESS_QUOTA_INFO @<DoPreScan> @@<ScanContextImpl.cpp:885>
15:12:27.305 <DBG><127:7433:7466> <C:2484> PreScanState: TmScanState::PS_URL_LISTS @<DoPreScan> @@<ScanContextImpl.cpp:949>
15:12:27.305 <DBG><127:7433:7466> <C:2484> DoPreScanCheckServerIPWhitelist: bGotAddr = 1, category = 5, addr = 31.13.91.2:0 @<DoPreScanCheckServerIPWhitelist> @@<ScanContextImpl.cpp:1467>
15:12:27.306 <DBG><127:7433:7466> <C:2484> HTTPS: Striped 443 port from URL[www.facebook.com]  @<DoPreScan> @@<ScanContextImpl.cpp:996>
15:12:27.306 <DBG><127:7433:7466> <C:2484> Check the https tunnel domain: www.facebook.com @<DoPreScan> @@<ScanContextImpl.cpp:1020>
15:12:27.306 <DBG><127:7433:7466> <C:2484> PreScan result [13], m_State [0], m_SSLState [2] @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7801>
15:12:27.306 <DBG><127:7433:7466> <C:2484> [https] Prescan returned tunnel: Pxy mode @<DoProcessing> @@<IWSSHttpProxyProtocol.cpp:7958>
15:12:27.306 <DBG><127:7433:7466> <C:2484> nextStageIfPossible: mState is RECV_REQUEST @<nextStageIfPossible> @@<IWSSHttpProxyProtocol.cpp:2188>
15:12:27.309 <DBG><127:7433:7466> <C:2484> pCCache->isTransparent: 0, m_bSkingHttpsScanRequestIsIwssServer: 0 @<connectToServerIfNecessary> @@<IWSSHttpProxyProtocol.cpp:1091>
15:12:27.309 <DBG><127:7433:7466> <C:2484> Check server port ACL for www.facebook.com port 443 @<connectToServerIfNecessary> @@<IWSSHttpProxyProtocol.cpp:1097>
15:12:27.309 <DBG><127:7433:7466> <C:2484> Set Read [2484] to 0 @<setReadMode> @@<WorkQueue_platform.cpp:192>
15:12:27.309 <DBG><127:7433:7466> <C:2484> Try to connect to [www.facebook.com:443] @<doConnect> @@<IWSSHttpProxyProtocol.cpp:1426>
15:12:27.309 <DBG><127:7433:7466> <C:2484> [HttpConnLIB] si_family: 2, local_addr: , is_listen: 0, socket [2487] created @<createTcpSocket> @@<TmSocket.cpp:3755>
15:12:27.309 <DBG><127:7433:7466> <C:2484><S:2487> Set Write [2487] to 1 @<setWriteMode> @@<WorkQueue_platform.cpp:217>

The HTTPS Decryption is enabled, however, the issue remains.

Details
Public

The issue occurs because facebook.com is in the Tunneled Domain List.

Remove the site from the said list to be able to successfully block HTTPS sites:

  1. Go to the IWSVA web console.
  2. Click HTTP > HTTPS Decryption > Tunneling > Failed HTTP Access.
  3. Uncheck Enable Auto Tunneling for Fatal Failures and then click Save.
  4. Go to Domain Tunneling, remove facebook.com again.

HTTPS sites should now be blocked by IWSVA.

Premium
Internal
Rating:
Category:
Troubleshoot
Solution Id:
1107847
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