Hello:
First, Sorry about my English.
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See this firewall rule
ipchains -s 192.168.0.0/24 1024:65535 \
-d www.microsoft.com/32 80 \
-p tcp -J DENY
See DNS query:
# nslookup
Default Server:
Address: 192.168.0.1
> set type=A
> www.microsoft.com
Server: lucas.linux.net
Address: 192.168.0.1
Name: microsoft.com
Addresses: 207.46.131.15, 207.46.131.137, 207.46.130.14,
207.46.130.149
207.46.130.150, 207.46.131.13
Aliases: www.microsoft.com
> microsoft.com
Server: lucas.linux.net
Address: 192.168.0.1
Non-authoritative answer:
Name: microsoft.com
Addresses: 207.46.131.137, 207.46.130.14, 207.46.130.149,
207.46.130.150
207.46.131.13, 207.46.131.15
>
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Which is the behaviour of the firewall?
The first time that the packet croos the firewall the destination IP
is
207.46.131.15 but the second time the destination IP is
207.46.131.137.
Which is the behaviour of the firewall? the firewall filters all the
ips
(207.46.131.137, 207.46.130.14, 207.46.130.149, 207.46.130.150, etc)
or only
one.
SALUDE3.
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