| 1 | # $Id: masks,v 1.5 2001-05-23 06:23:35 jweiss Exp $ |
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| 2 | |
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| 3 | # This file specifies the netmasks for each network supported by the |
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| 4 | # Athena environment. The format for lines in the file is: |
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| 5 | # |
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| 6 | # address significant-bits netmask-bits [gateway] |
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| 7 | # |
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| 8 | # The number of netmask bits for a given IP address is the value of |
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| 9 | # <netmask-bits> on the first line for which <address> matches the |
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| 10 | # first <significant-bits> bits of the given address. If a gateway |
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| 11 | # is not given, the gateway is assumed to be one greater than the |
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| 12 | # network address. |
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| 13 | # |
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| 14 | # The contents of this file are maintained by Athena release |
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| 15 | # engineering. If you edit this file on your workstation, it will be |
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| 16 | # replaced at the next update and your changes will be lost. If you |
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| 17 | # have local changes to make, create or add to |
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| 18 | # /etc/athena/masks.local, which has the same file format as this |
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| 19 | # file. Entries in /etc/athena/masks.local take precedence over |
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| 20 | # entries in this file. |
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| 21 | # |
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| 22 | # The shell script /etc/athena/netparams uses this file to compute the |
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| 23 | # network, broadcast, and gateway address for a given IP address. See |
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| 24 | # the comments at the top of that file for usage information. |
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| 25 | |
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| 26 | # Most MITnet addresses begin with "18" and have a 16-bit netmask. |
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| 27 | # 18.7 is being used in IS machine rooms with a 24-bit netmask. |
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| 28 | # At least parts of 18.7.1 are being used as /30s for servers that |
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| 29 | # don't like to have their IP address changed. |
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| 30 | # Bits of LCS also have a 24-bit netmask, according to |
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| 31 | # wollman@lcs.mit.edu, 1/12/98. |
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| 32 | # 18.101 is being used for IS internal experiments, with a 28 bit netmask. |
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| 33 | 18.7.1.0 24 30 |
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| 34 | 18.7.0.0 16 24 |
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| 35 | 18.24.0.0 16 24 |
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| 36 | 18.26.0.0 16 24 |
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| 37 | 18.101.0.0 16 28 |
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| 38 | 18.0.0.0 8 16 |
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| 39 | |
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| 40 | # WHOI has a class B subnetted to 22 bits. 128.128.16 has a funny |
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| 41 | # gateway address. |
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| 42 | 128.128.16.0 22 22 128.128.16.7 |
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| 43 | 128.128.0.0 16 22 |
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| 44 | |
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| 45 | # AI lab configuration, from bruce@ai.mit.edu, 1/12/98 |
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| 46 | 128.52.32.0 24 24 128.52.32.10 |
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| 47 | 128.52.37.0 24 24 128.52.37.10 |
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| 48 | 128.52.38.0 24 24 128.52.38.10 |
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| 49 | 128.52.39.0 24 24 128.52.39.10 |
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| 50 | 128.52.54.0 24 24 128.52.54.10 |
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