A P P E N D I X D
Common Port Assignments
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| Table | Currently Assigned TCP and UDP Port Numbers | |||||||
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0 | — |
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| Reserved | ||||||
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| Unassigned | |||||
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5 | RJE |
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| Remote job entry | ||||||
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7 | ECHO |
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| Echo | ||||||
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9 | DISCARD |
| Discard | |||||||
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11 | USERS |
| Active users | |||||||
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13 | DAYTIME |
| Daytime | |||||||
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15 | NETSTAT |
| Who is up or NETSTAT | |||||||
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17 | QUOTE |
| Quote of the day | |||||||
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19 | CHARGEN |
| Character generator | |||||||
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20 |
| File Transfer Protocol (data) | ||||||||
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21 | FTP |
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| File Transfer Protocol | ||||||
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23 | TELNET |
| Terminal connection | |||||||
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25 | SMTP |
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| Simple Mail Transport Protocol | ||||||
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37 | TIME |
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| Time | ||||||
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39 | RLP |
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| Resource Location Protocol | ||||||
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42 | NAMESERVER |
| Hostname server | |||||||
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43 | NICNAME |
| Who is | |||||||
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49 | LOGIN |
| Login Host Protocol | |||||||
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53 | DOMAIN |
| Domain name server | |||||||
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67 | BOOTPS |
| Bootstrap Protocol Server | |||||||
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68 | BOOTPC |
| Bootstrap Protocol Client | |||||||
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69 | TFTP |
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| Trivial File Transfer Protocol | ||||||
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75 | — |
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| Any private | ||||||
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| Cisco 819 Integrated Services Routers Software Configuration Guide |
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