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Internet Core Protocols: The Definitive Guide
book

Internet Core Protocols: The Definitive Guide

by Eric Hall
February 2000
Intermediate to advanced content levelIntermediate to advanced
464 pages
15h 57m
English
O'Reilly Media, Inc.
Content preview from Internet Core Protocols: The Definitive Guide

Firewalls Blocking UDP Messages

Many network managers block all UDP traffic, with the exception of a few critical ports (such as DNS). If you are experiencing problems connecting to remote UDP applications, then you should investigate whether or not a remote firewall is blocking UDP traffic. Note that the problem could also be reversed, with your firewall blocking the return UDP traffic. In this case, your UDP traffic may be leaving the network just fine, but the packets coming back from the remote system may be getting discarded by your own firewall.

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Publisher Resources

ISBN: 1565925726Supplemental ContentErrata Page