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I am trying to use nmap to scan a /119 IPv6 network. (512 addresses). Before I do this I want to generate a file that will populate all of the ip addresses in that range. The network info is as follows:
network 2607:f4a0:3:0:250:56ff:feac:3c00
Prefix length 119
network range 2607:f4a0:0003:0000:0250:56ff:feac:3c00-
2607:f4a0:0003:0000:0250:56ff:feac:3dff
So I set my script up like this:
[root@ns1 ~]# for i in {1..512}; do printf "2607:f4a0:3:0:250:56ff:feac:3c00%xn" $i >> ipv6.txt; done
What I expect to see in the file are 512 addresses that are within the range above. However what I see instead is this:
2607:f4a0:3:0:250:56ff:feac:3c001 2607:f4a0:3:0:250:56ff:feac:3c002 2607:f4a0:3:0:250:56ff:feac:3c003 2607:f4a0:3:0:250:56ff:feac:3c004 2607:f4a0:3:0:250:56ff:feac:3c005 2607:f4a0:3:0:250:56ff:feac:3c006 2607:f4a0:3:0:250:56ff:feac:3c007 2607:f4a0:3:0:250:56ff:feac:3c008 2607:f4a0:3:0:250:56ff:feac:3c009 2607:f4a0:3:0:250:56ff:feac:3c00a 2607:f4a0:3:0:250:56ff:feac:3c00b 2607:f4a0:3:0:250:56ff:feac:3c00c 2607:f4a0:3:0:250:56ff:feac:3c00d 2607:f4a0:3:0:250:56ff:feac:3c00e 2607:f4a0:3:0:250:56ff:feac:3c00f 2607:f4a0:3:0:250:56ff:feac:3c0010 2607:f4a0:3:0:250:56ff:feac:3c0011 2607:f4a0:3:0:250:56ff:feac:3c0012 2607:f4a0:3:0:250:56ff:feac:3c0013 2607:f4a0:3:0:250:56ff:feac:3c0014 2607:f4a0:3:0:250:56ff:feac:3c0015 2607:f4a0:3:0:250:56ff:feac:3c0016 2607:f4a0:3:0:250:56ff:feac:3c0017 2607:f4a0:3:0:250:56ff:feac:3c0018 2607:f4a0:3:0:250:56ff:feac:3c0019 2607:f4a0:3:0:250:56ff:feac:3c001a 2607:f4a0:3:0:250:56ff:feac:3c001b 2607:f4a0:3:0:250:56ff:feac:3c001c
When I go to run nmap I get errors:
nmap -Pn -sT -p 22 -6 -iL ipv6.txt > ipv6up
Errors:
Failed to resolve given IPv6 hostname/IP: 2607:f4a0:3:0:250:56ff:feac:3c00200. Note that you can't use '/mask' or '[1-4,7,100-]' style ranges for IPv6.
How can I fix this?
Answer
for i in {15360..15871}; do printf "2607:f4a0:3:0:250:56ff:feac:%.4xn" $i; done
Output:
2607:f4a0:3:0:250:56ff:feac:3c00 2607:f4a0:3:0:250:56ff:feac:3c01 2607:f4a0:3:0:250:56ff:feac:3c02 2607:f4a0:3:0:250:56ff:feac:3c03 . . . 2607:f4a0:3:0:250:56ff:feac:3dfd 2607:f4a0:3:0:250:56ff:feac:3dfe 2607:f4a0:3:0:250:56ff:feac:3dff
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