![](/images/new-backgrounds/1168983/168983227x1.webp)
Prestige 642R Series ADSL Router
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| Press [SPACE BAR] to choose | |
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| Menu 21.3.1 - TCP/IP Filter Rule |
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| this filter rule type. The first | ||||||
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| Filter #: 3,1 |
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| filter rule type determines all | ||
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| Filter Type= TCP/IP Filter Rule |
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| subsequent filter types within a | ||||
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| Active= Yes |
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| IP Protocol= 6 | IP Source Route= No |
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| set. | ||||
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| Destination: IP Addr= 0.0.0.0 |
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| IP Mask= 0.0.0.0 |
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| Port #= 23 |
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| Port # Comp= Equal |
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| Select Yes to make the rule | ||||
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| Source: IP Addr= 0.0.0.0 |
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| active. | ||||
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| IP Mask= 0.0.0.0 |
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| Port #= |
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| Port # Comp= None |
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| TCP Estab= No |
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| 6 is the TCP protocol. | ||
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| More= No | Log= None |
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| Action Matched= Drop |
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| Action Not Matched= Forward |
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| Press ENTER to Confirm or ESC to Cancel: |
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| Press Space Bar to Toggle. |
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| The port number for the telnet | ||||
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| service (TCP protocol) is 23. | |
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| See RFC 1060 for port numbers | |||
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| Select Equal |
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| more rules to |
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| of | |||||
| check. |
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| here as we are |
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| looking for |
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| packets going to |
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| Select Drop here so that |
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| port 23 only. |
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| the packet will be |
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| dropped if its destination |
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| is the telnet port. |
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| Select Forward here so that |
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| the packet will be forwarded |
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| if its destination is not the |
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| telnet port. |
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Figure 8-14 Example Filter - Menu 21.3.1
When you press [ENTER] to confirm, you will see the following screen. Note that there is only one filter rule in this set.
Filter Configuration |