Gentoo Archives: gentoo-user

From: Samuraiii <samurai.no.dojo@×××××.com>
To: gentoo-user <gentoo-user@l.g.o>
Subject: [gentoo-user] Re: VPN vs LAN address hostname resolution
Date: Fri, 31 May 2013 16:05:02
Message-Id: 51A8CA14.6030506@gmail.com
In Reply to: [gentoo-user] VPN vs LAN address hostname resolution by Samuraiii
1 If someone is intrested here is second (undebugged) incarnation of my
2 hostnames updater script:
3
4 #!/bin/sh
5 #verze 2.0.0_2013-05-31
6 lock=/var/run/hostnames-updater.pid
7 shmm="/dev/shm/hosts"
8
9 clean () {
10 rm $lock
11 rm $shmm
12 }
13 trap clean SIGHUP SIGINT SIGTERM
14
15 /bin/echo $$ > $lock
16 while /bin/true
17 tst(){
18 x=0
19 if $3 = $(/usr/bin/ssh-keyscan -p $2 $5 2>/dev/null|/bin/sed 's/.*\
20 ssh-.*\ //g'|/usr/bin/whirpooldeep)
21 then
22 x=$5
23 elif /usr/bin/test $1 -gt 2
24 then
25 if $3 = $(/usr/bin/ssh-keyscan -p $2 $6 2>/dev/null|/bin/sed
26 's/.*\ ssh-.*\ //g'|/usr/bin/whirlpooldeep)
27 then
28 x=$6
29 else
30 x=$4
31 fi
32 else
33 x=$4
34 fi
35 }
36
37 #host testing line is as folows
38 #tst <number of addresses to try - some hosts do have wl and eth
39 interface)> \
40 #<output of ssh-keyscan -p <port> <address> 2>/dev/null|/bin/sed 's/.*\
41 ssh-.*\ //g'|/usr/bin/whirlpooldeep> \
42 #<fallback address - eg. vpn one> <address 2> <address n>
43
44 ####################host 1
45 tst <address count n> <port> <hash> <address 1 > ... <address n> 2>&1
46 >/dev/null
47 host1=$x
48
49
50 #lets create hosts file
51 /bin/echo "# /etc/hosts: Local Host Database
52 #
53 # This file describes a number of aliases-to-address mappings for the for
54 # local hosts that share this file.
55 #
56 # In the presence of the domain name service or NIS, this file may not be
57 # consulted at all; see /etc/host.conf for the resolution order.
58 #
59
60 # IPv4 and IPv6 localhost aliases
61 127.0.0.1 $(hostname).local $(hostname) localhost
62 ::1 localhost
63
64 #
65 # Imaginary network.
66 $host1 host1
67 # Last update $(date --rfc-3339)
68
69 #
70 #
71 # According to RFC 1918, you can use the following IP networks for private
72 # nets which will never be connected to the Internet:
73 #
74 # 10.0.0.0 - 10.255.255.255
75 # 172.16.0.0 - 172.31.255.255
76 # 192.168.0.0 - 192.168.255.255
77 #
78 # In case you want to be able to connect directly to the Internet (i.e. not
79 # behind a NAT, ADSL router, etc...), you need real official assigned
80 # numbers. Do not try to invent your own network numbers but instead
81 get one
82 # from your network provider (if any) or from your regional registry (ARIN,
83 # APNIC, LACNIC, RIPE NCC, or AfriNIC.)
84 #
85 " > $shmm
86 /bin/mv $shmm /etc/hosts
87 /usr/bin/sleep 300
88 done
89
90
91 I hope I helps someone
92 S

Replies

Subject Author
[gentoo-user] Re: VPN vs LAN address hostname resolution Samuraiii <samurai.no.dojo@×××××.com>