Apple Mac OS X Server (Administrator’s Guide) Uživatelský manuál Strana 543

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Firewall Service 543
Solving Problems
This section reviews some common Firewall service issues and provides possible solutions.
You Can’t Access the Server Over TCP/IP
m Check the filters in the filter list. If you started Firewall service, but have not added any
additional filters, all TCP access to your server is denied by default.
m Stop Firewall service. Add new filters to your filter list that allow access to computers that
have the IP addresses you specify. Then restart Firewall service.
You Can’t Locate a Specific Filter
m Use the Find button in the IP Filter List window to locate specific filters by IP address,
port, or access type.
Where to Find More Information
Request for Comments (RFC) documents provide an overview of a protocol or service and
details about how the protocol should behave. If you are a novice server administrator, you’ll
probably find some of the background information in an RFC helpful. If you are an
experienced server administrator, you can find all the technical details about a protocol in its
RFC document. You can search for RFC documents by number at this Web site:
www.faqs.org/rfcs
m See RFC 792 for information on ICMP.
m IGMP is documented in Appendix I of RFC 1112.
m Important multicast addresses are documented in the most recent Assigned Numbers
RFC, currently RFC 1700.
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