ISA on Win 2003 SBS crashed

I have ISA 2004 installed on a SBS 2003 SP1 which is also running Exchange, MS SQL and Active Directory.
This has affected OWA and the link [url]http://mail.xxx.com:8080/exchange is not working. It gives a blank page without any error report.
I have restored severally array configurations without success. I have also done Directory services restore but cannot get it work. OWA on the network works but not from outside the firewall - Cisco firewall.
I am wondering if its possible to 'repair ISA'
Furthermore https pages appear when blank - no error also. All solutions av found on google haven't solved the problem.
If I completely remove ISA, what are the implications on my network?
The server was setup by a previous admin who left.

Thank you all

tnai9

Any error messages from the client/server side?
Did you made any tracerts?
Did you tried nslookup to verfiy DNS is working problably?

Could also be a routing issue.
Did you checked any static routes?
Is RRAS enabled on the server?

Make otherwise a DCdiag and a Netdiag and post it back.

This is a notepad document of the ISA configuration and monitoring. Sorry I wasnt able to organize it nicely.

Name Description Server Event
Alert action failure The action associated with this alert failed. ANDYSVR Alert action failure
Cache container initialization error The cache container initialization failed and the initialization was ignored. ANDYSVR Cache container initialization error
Cache container recovery complete Recovery of a single cache container was completed. ANDYSVR Cache container recovery complete
Cache file resize failure The operation to reduce the size of the cache file failed. ANDYSVR Cache file resize failure
Cache initialization failure The Web cache proxy was disabled because of a global failure. ANDYSVR Cache initialization failure
Cache restoration completed The cache content restoration was completed. ANDYSVR Cache restoration completed
Cache write error There was a failure in writing content to the cache. ANDYSVR Cache write error
Cached object discarded During cache recovery, an object with conflicting information was detected. The conflicting object was discarded. ANDYSVR Cached object ignored
Component load failure Failed to load an extension component. ANDYSVR Component load failure
Configuration error An error occurred while reading configuration information. ANDYSVR Configuration error
Dial-on-demand failure Failed to create a dial-on-demand connection, either because there is no answer or the line is busy. ANDYSVR Dial-on-demand failure
DNS intrusion A host name overflow, length overflow, zone high port, or zone transfer attack occurred. ANDYSVR DNS intrusion
Event log failure An attempt to log the event information to the system event log failed. ANDYSVR Event log failure
Firewall communication failure There is a failure in communication between the Firewall client and the ISA Server Firewall service. ANDYSVR Client/server communication failure
Intrusion detected An intrusion was attempted by an external user. ANDYSVR Intrusion detected
Invalid dial-on-demand credentials Dial-on-demand credentials are invalid. ANDYSVR Invalid dial-on-demand credentials
Invalid ODBC log credentials. The specified user name or password for this ODBC database is invalid. ANDYSVR Invalid ODBC log credentials
IP packet dropped IP packet was dropped according to specified policy. ANDYSVR IP packet dropped
IP Protocol violation A packet with invalid IP options was detected and the packet dropped. ANDYSVR IP Protocol violation
IP spoofing The IP packet source address is not valid. ANDYSVR IP spoofing
Log failure One of the service logs failed. ANDYSVR Log failure
Missing installation component A component that was configured for the array is missing on this server. ANDYSVR Missing installation component
Network configuration changed A network configuration change that affects ISA Server was detected. ANDYSVR Network configuration changed
No available ports Failed to create a network socket because there are no available ports ANDYSVR No available ports
OS component conflict There is a conflict with one of the operating system components: NAT editor, ICS, or RRAS. ANDYSVR Operating system component conflict
Oversized UDP packet ISA Server dropped a UDP packet because it exceeded the maximum UDP packet size, as specified in the registry key. ANDYSVR Oversize UDP packet
POP Intrusion POP buffer overflow detected ANDYSVR POP Intrusion
Report Summary Generation Failure An error occurred while generating a report summary from log files ANDYSVR Report Summary Generation Failure
Resource allocation failure A resource allocation failure has occurred. For example, insufficient memory resources. ANDYSVR Resource allocation failure
Routing (chaining) failure The ISA Server failed to route the request to an upstream server. ANDYSVR Routing (chaining) failure
Routing (chaining) recovery The ISA Server resumed routing to an upstream server. ANDYSVR Routing (chaining) recovery
RPC Filter - connectivity changed The connectivity to the publishing RPC service changed ANDYSVR RPC Filter - connectivity changed
Server Publishing Failure The server publishing rule is configured incorrectly. ANDYSVR Server Publishing Failure
Server publishing is not applicable. The server publishing rule cannot be applied. ANDYSVR Server Publishing Failure
Server Publishing Recovery The server publishing rule can now be applied. ANDYSVR Server Publishing Recovery
Service Initialization failure The service failed to initialize. ANDYSVR Service Initialization failure
Service not responding An ISA Server service terminated or stopped functioning unexpectedly. ANDYSVR Service not responding
Service shutdown The service was stopped gracefully. ANDYSVR Service shutdown
Service started Service started. ANDYSVR Service started
SMTP Filter event An SMTP command rule was violated ANDYSVR SMTP Filter event
SOCKS configuration failure The port specified in SOCKS properties is in use by another protocol. ANDYSVR SOCKS configuration failure
The server is not in the array's site All members of the array must be in the same site. This server is in a different site. ANDYSVR The server is not in the array's site
Unregistered event An unregistered event occurred. ANDYSVR Unregistered event
Upstream chaining credentials Upstream chaining credentials are invalid. ANDYSVR Upstream chaining credentials
WMT live stream splitting failure The streaming application filter encounter an error during WMT live stream splitting ANDYSVR WMT live stream splitting failure


Tracert is working well also. No issues. the browsers have been autoconfigured to connect directly when ISA is unavailable.