Problem with --traceroute option with 6.00 and 6.25

[Jorge García - Bardok <bardok () gmail com>]

Hi,

I've just updated the nmap version I use with my students at school in
order to have all prepared for next year (sec. school, we teach them what a
network topology is using zenmap). Since this new version only two hosts
appear in traceroute.

This is the output with 6.25 (zenmap quick traceroute, both Windows and
Linux, also tried with 6.00 from the Ubuntu repo and a compiled 6.25):

------------------------------------------
Starting Nmap 6.25 ( http://nmap.org ) at 2013-07-04 09:04 Hora de verano
romance
Nmap scan report for www.google.com (173.194.40.148)
Host is up (0.0020s latency).
Other addresses for www.google.com (not scanned): 173.194.40.146
173.194.40.145 173.194.40.147 173.194.40.144
rDNS record for 173.194.40.148: par10s10-in-f20.1e100.net

TRACEROUTE (using port 80/tcp)
HOP RTT     ADDRESS
1   2.00 ms 192.168.1.3
2   1.00 ms par10s10-in-f20.1e100.net (173.194.40.148)

Nmap done: 1 IP address (1 host up) scanned in 0.30 seconds
------------------------------------------

This one is the output from a computer with 5.51 installed (using the same
network connection):

------------------------------------------
Starting Nmap 5.51 ( http://nmap.org ) at 2013-07-04 09:02 Hora de verano
romance
Nmap scan report for www.google.com (173.194.40.146)
Host is up (0.038s latency).
Other addresses for www.google.com (not scanned): 173.194.40.145
173.194.40.147 173.194.40.144 173.194.40.148
rDNS record for 173.194.40.146: par10s10-in-f18.1e100.net

TRACEROUTE (using proto 1/icmp)
HOP RTT      ADDRESS
1   1.00 ms  192.168.1.3
2   1.00 ms  10.0.0.1
3   9.00 ms  12.212-142-129.static.clientes.euskaltel.es (212.142.129.12)
4   11.00 ms 172.19.18.21
5   20.00 ms 80.157.128.22
6   25.00 ms te0-6-0-0.mpd22.par01.atlas.cogentco.com (154.54.63.94)
7   41.00 ms 209.85.240.189
8   33.00 ms te0-7-0-31.ccr22.lon01.atlas.cogentco.com (154.54.57.162)
9   38.00 ms 209.85.243.47
10  39.00 ms 149.14.8.50
11  71.00 ms 209.85.255.76
12  39.00 ms par10s10-in-f18.1e100.net (173.194.40.146)

Nmap done: 1 IP address (1 host up) scanned in 1.66 seconds
------------------------------------------

I've been searching the web, looking for the same problem, but have found
nothing. Any help would be appreciated.

Best regards:

--
Jorge García (aka Bardok)
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