OSEC

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ICMP TYPE 3

From: gr00vy (groovy2600yahoo.com.ar)
Date: Fri Sep 12 2003 - 23:00:26 CDT


While I was doing some researching work I ping a broadcast ip address
and for my surprise i recieve an extrange response:

FIRST RESPONSE:

Internet Protocol, Src Addr: 200-70-xxx-164.rse.com.ar (200.70.xxx.164),
Dst Addr: 200-70-xxx-121.rse.com.ar (200.70.xxx.121)
Internet Control Message Protocol
    Type: 0 (Echo (ping) reply)
    Code: 0

SECOND RESPONSE:

Internet Protocol, Src Addr: 172.xxx.230.242 (172.xxx.230.242), Dst
Addr: 200-70-xxx-121.rse.com.ar (200.70.xxx.121)
Internet Control Message Protocol
    Type: 3 (Destination unreachable)
    Code: 13 (Communication administratively filtered) <<< Weird!

The OS's seems to be (xprobe):

First ROUTER
[+] Host 200.70.xxx.164 Running OS: "HP JetDirect ROM G.07.02 EEPROM
G.07.20" (Guess probability: 87%)

Second ROUTER
[+] Host 172.xxx.230.242 Running OS: "Cisco IOS 12.2" (Guess
probability: 71%)

My question is, what is it? an ACL? why do i get a response of a machine
i did not ping??? maybe it is a extrange behavior from Cisco ios.
This might help to fingerprint Os's who knows ????

Bye
--
gr00vy <groovy2600yahoo.com.ar>
Linux User -- ZenCracking.com.ar

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