Re: nmap from net a to net B, don't work, but ping yes

Chris Davies wrote:

RicK_Murphy

<rmarfisiDA_QUI_NO_SPAM_LEVA_TOGLI_TUTTO_QUELLO@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote:
I have 4 pc

pc1 10.10.10.100
pc2 10.10.1.101

What's pc2's other IP address (on the 10.10.10.0/24 network)?

eth1 of pc2: 10.10.10.101


pc3 10.10.1.102
pc4 10.10.1.103

pc2 have this routing table:
10.10.1.0 0.0.0.0 255.255.255.0 U 0 0 0
eth0
10.10.10.0 0.0.0.0 255.255.255.0 U 0 0 0
eth1
0.0.0.0 10.10.10.1 0.0.0.0 UG 0 0 0
eth1

it'is a router between 10.10.1.0/24 and 10.10.10.0/24
i do in pc2: sysctl -w net.ipv4.ip_forward=1

when i ping from pc1 to pc3 it works fine

but if i do from pc1 to 10.10.1.0/24
nmap -sS -A 10.10.1.0/24

it find only pc2 (router) because it have eth1 in the same network of pc1

What are the routing tables on pc1, pc3, and pc4? It looks like you may
have forgotten routes to pc2 for the "other" network.

in pc1:
10.10.1.0 10.10.10.101 255.255.255.0 UG 0 0 0 eth1
10.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 eth1
0.0.0.0 10.10.10.1 0.0.0.0 UG 0 0 0 eth1

in pc3, pc4:
10.10.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
0.0.0.0 10.10.1.101 0.0.0.0 UG 0 0 0 eth0

observe that ping works fine


Chris
thanks
--
Riccardo (http://termitano.myminicity.com, visitate e se volete partecipate
sul http://www.iltermitano.it/)

A computer is like an air conditioner,
it stops working when you open Windows.
Registered Linux user #457776
.

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