Nmap Development mailing list archives

More Linux routing problems


From: David Fifield <david () bamsoftware com>
Date: Mon, 23 Feb 2009 11:14:27 -0700

I was sent this message with an error message similar to the one
described at

http://seclists.org/nmap-dev/2009/q1/0434.html

which was caused by /proc/net/route being empty.

This case looks to be caused by some misconfiguration. See near the
bottom where there is
        /proc/net/route: Permission denied
        INET (IPv4) not configured in this system.

Were these commands run as root? The --privileged option will fail
unless you are root. Can you read /proc/net/route as root?

David Fifield

----- Forwarded message from PGNet <pgnet.trash+nmap () gmail com> -----

I'll impose once again, and just reply to you ... if in your judgement
it's at all relevant to your comment, please fee free to inject any
subsequent reply into the thread.  That should do it ...

i'm seeing some similar symptons, namely the problems with missing
routes -- i'm not at all clear that the cases are actually related.

i've built/installed nmap in my local dirs, on a shared (Debian) host.

        which nmap
                /home/pgnet/bin/nmap
        nmap --version
                Nmap version 4.85BETA3 ( http://nmap.org )

this works,

        nmap -d9 -PN host.domain.com
                Starting Nmap 4.85BETA3 ( http://nmap.org ) at 2009-02-22 19:22 PST
                ...
                Nmap done: 1 IP address (1 host up) scanned in 11.28 seconds

but this,

        nmap -d9 -vvvvvvvv -PN -p42000-42100 --send-eth --privileged -sU
host.domain.com
        
                Starting Nmap 4.85BETA3 ( http://nmap.org ) at 2009-02-22 19:17 PST
                Fetchfile found /home/pgnet/share/nmap/nmap-services
                The max # of sockets we are using is: 0
                --------------- Timing report ---------------
                  hostgroups: min 1, max 100000
                  rtt-timeouts: init 1000, min 100, max 10000
                  max-scan-delay: TCP 1000, UDP 1000
                  parallelism: min 0, max 0
                  max-retries: 10, host-timeout: 0
                  min-rate: 0, max-rate: 0
                ---------------------------------------------
                nexthost: failed to determine route to aa.bb.cc.dd
                QUITTING!

adding the add'l info requested in the thread,

nmap --iflist

        Starting Nmap 4.85BETA3 ( http://nmap.org ) at 2009-02-22 19:17 PST
        ************************INTERFACES************************
        DEV      (SHORT) IP/MASK           TYPE     UP MAC
        lo       (lo)    127.0.0.1/8       loopback up
        eth0     (eth0)  10.174.10.142/22  ethernet up 01:26:35:C2:73:6C
        eth0:0   (eth0)  10.174.9.0/22     ethernet up 01:26:35:C2:73:6C
        eth1     (eth1)  xx.205.29.53/22   ethernet up 01:26:35:C2:73:6D
        eth1:0   (eth1)  xx.119.206.196/22 ethernet up 01:26:35:C2:73:6D
        eth1:102 (eth1)  xx.205.43.251/22  ethernet up 01:26:35:C2:73:6D
        eth1:112 (eth1)  xx.205.7.203/22   ethernet up 01:26:35:C2:73:6D
        eth1:15  (eth1)  xx.205.47.5/22    ethernet up 01:26:35:C2:73:6D
        eth1:2   (eth1)  xx.119.219.62/22  ethernet up 01:26:35:C2:73:6D
        eth1:51  (eth1)  xx.119.214.106/22 ethernet up 01:26:35:C2:73:6D
        eth1:54  (eth1)  xx.205.51.46/22   ethernet up 01:26:35:C2:73:6D
        eth1:67  (eth1)  xx.205.37.255/22  ethernet up 01:26:35:C2:73:6D
        eth1:1   (eth1)  xx.205.30.169/22  ethernet up 01:26:35:C2:73:6D
        eth1:10  (eth1)  xx.205.30.50/22   ethernet up 01:26:35:C2:73:6D
        eth1:100 (eth1)  xx.205.30.237/22  ethernet up 01:26:35:C2:73:6D
        eth1:101 (eth1)  xx.205.31.184/22  ethernet up 01:26:35:C2:73:6D
        eth1:103 (eth1)  xx.205.29.76/22   ethernet up 01:26:35:C2:73:6D
        eth1:104 (eth1)  xx.205.28.70/22   ethernet up 01:26:35:C2:73:6D
        eth1:105 (eth1)  xx.205.30.161/22  ethernet up 01:26:35:C2:73:6D
        eth1:106 (eth1)  xx.205.41.146/22  ethernet up 01:26:35:C2:73:6D
        eth1:107 (eth1)  xx.205.30.216/22  ethernet up 01:26:35:C2:73:6D
        eth1:108 (eth1)  xx.205.28.242/22  ethernet up 01:26:35:C2:73:6D
        eth1:109 (eth1)  xx.205.29.45/22   ethernet up 01:26:35:C2:73:6D
        eth1:11  (eth1)  xx.205.30.173/22  ethernet up 01:26:35:C2:73:6D
        eth1:110 (eth1)  xx.205.30.81/22   ethernet up 01:26:35:C2:73:6D
        eth1:111 (eth1)  xx.205.29.87/22   ethernet up 01:26:35:C2:73:6D
        eth1:113 (eth1)  xx.205.4.132/22   ethernet up 01:26:35:C2:73:6D
        eth1:114 (eth1)  xx.205.30.65/22   ethernet up 01:26:35:C2:73:6D
        eth1:115 (eth1)  xx.205.30.23/22   ethernet up 01:26:35:C2:73:6D
        eth1:116 (eth1)  xx.205.30.82/22   ethernet up 01:26:35:C2:73:6D
        eth1:117 (eth1)  xx.205.4.165/22   ethernet up 01:26:35:C2:73:6D
        eth1:118 (eth1)  xx.205.30.68/22   ethernet up 01:26:35:C2:73:6D
        eth1:119 (eth1)  xx.205.30.113/22  ethernet up 01:26:35:C2:73:6D
        eth1:12  (eth1)  xx.205.31.13/22   ethernet up 01:26:35:C2:73:6D
        eth1:120 (eth1)  xx.205.29.71/22   ethernet up 01:26:35:C2:73:6D
        eth1:121 (eth1)  xx.205.30.55/22   ethernet up 01:26:35:C2:73:6D
        eth1:122 (eth1)  xx.205.7.47/22    ethernet up 01:26:35:C2:73:6D
        eth1:123 (eth1)  xx.205.30.110/22  ethernet up 01:26:35:C2:73:6D
        eth1:124 (eth1)  xx.205.30.73/22   ethernet up 01:26:35:C2:73:6D
        eth1:125 (eth1)  xx.205.31.213/22  ethernet up 01:26:35:C2:73:6D
        eth1:126 (eth1)  xx.205.7.227/22   ethernet up 01:26:35:C2:73:6D
        eth1:127 (eth1)  xx.205.29.210/22  ethernet up 01:26:35:C2:73:6D
        eth1:128 (eth1)  xx.205.30.240/22  ethernet up 01:26:35:C2:73:6D
        eth1:129 (eth1)  xx.205.28.233/22  ethernet up 01:26:35:C2:73:6D
        eth1:13  (eth1)  xx.205.31.25/22   ethernet up 01:26:35:C2:73:6D
        eth1:14  (eth1)  xx.205.4.209/22   ethernet up 01:26:35:C2:73:6D
        eth1:16  (eth1)  xx.205.30.203/22  ethernet up 01:26:35:C2:73:6D
        eth1:17  (eth1)  xx.205.31.162/22  ethernet up 01:26:35:C2:73:6D
        eth1:18  (eth1)  xx.205.31.163/22  ethernet up 01:26:35:C2:73:6D
        eth1:19  (eth1)  xx.205.31.210/22  ethernet up 01:26:35:C2:73:6D
        eth1:20  (eth1)  xx.205.7.155/22   ethernet up 01:26:35:C2:73:6D
        eth1:21  (eth1)  xx.205.47.191/22  ethernet up 01:26:35:C2:73:6D
        eth1:22  (eth1)  xx.205.30.20/22   ethernet up 01:26:35:C2:73:6D
        eth1:23  (eth1)  xx.205.29.208/22  ethernet up 01:26:35:C2:73:6D
        eth1:24  (eth1)  xx.205.31.28/22   ethernet up 01:26:35:C2:73:6D
        eth1:25  (eth1)  xx.205.29.218/22  ethernet up 01:26:35:C2:73:6D
        eth1:26  (eth1)  xx.205.4.115/22   ethernet up 01:26:35:C2:73:6D
        eth1:27  (eth1)  xx.119.218.141/22 ethernet up 01:26:35:C2:73:6D
        eth1:28  (eth1)  xx.205.30.67/22   ethernet up 01:26:35:C2:73:6D
        eth1:29  (eth1)  xx.205.30.152/22  ethernet up 01:26:35:C2:73:6D
        eth1:3   (eth1)  xx.205.5.183/22   ethernet up 01:26:35:C2:73:6D
        eth1:30  (eth1)  xx.205.28.75/22   ethernet up 01:26:35:C2:73:6D
        eth1:31  (eth1)  xx.205.31.12/22   ethernet up 01:26:35:C2:73:6D
        eth1:32  (eth1)  xx.205.29.51/22   ethernet up 01:26:35:C2:73:6D
        eth1:33  (eth1)  xx.205.31.169/22  ethernet up 01:26:35:C2:73:6D
        eth1:34  (eth1)  xx.205.4.145/22   ethernet up 01:26:35:C2:73:6D
        eth1:35  (eth1)  xx.205.28.55/22   ethernet up 01:26:35:C2:73:6D
        eth1:36  (eth1)  xx.205.29.222/22  ethernet up 01:26:35:C2:73:6D
        eth1:37  (eth1)  xx.205.31.24/22   ethernet up 01:26:35:C2:73:6D
        eth1:38  (eth1)  xx.205.30.2/22    ethernet up 01:26:35:C2:73:6D
        eth1:39  (eth1)  xx.205.5.164/22   ethernet up 01:26:35:C2:73:6D
        eth1:4   (eth1)  xx.205.7.246/22   ethernet up 01:26:35:C2:73:6D
        eth1:40  (eth1)  xx.205.29.49/22   ethernet up 01:26:35:C2:73:6D
        eth1:41  (eth1)  xx.205.31.135/22  ethernet up 01:26:35:C2:73:6D
        eth1:42  (eth1)  xx.205.29.217/22  ethernet up 01:26:35:C2:73:6D
        eth1:43  (eth1)  xx.205.30.163/22  ethernet up 01:26:35:C2:73:6D
        eth1:44  (eth1)  xx.205.31.187/22  ethernet up 01:26:35:C2:73:6D
        eth1:45  (eth1)  xx.205.31.160/22  ethernet up 01:26:35:C2:73:6D
        eth1:46  (eth1)  xx.205.4.116/22   ethernet up 01:26:35:C2:73:6D
        eth1:47  (eth1)  xx.205.5.179/22   ethernet up 01:26:35:C2:73:6D
        eth1:48  (eth1)  xx.205.30.209/22  ethernet up 01:26:35:C2:73:6D
        eth1:49  (eth1)  xx.205.28.106/22  ethernet up 01:26:35:C2:73:6D
        eth1:5   (eth1)  xx.205.31.168/22  ethernet up 01:26:35:C2:73:6D
        eth1:50  (eth1)  xx.205.31.229/22  ethernet up 01:26:35:C2:73:6D
        eth1:52  (eth1)  xx.205.30.220/22  ethernet up 01:26:35:C2:73:6D
        eth1:53  (eth1)  xx.205.31.183/22  ethernet up 01:26:35:C2:73:6D
        eth1:55  (eth1)  xx.205.29.202/22  ethernet up 01:26:35:C2:73:6D
        eth1:56  (eth1)  xx.205.31.252/22  ethernet up 01:26:35:C2:73:6D
        eth1:57  (eth1)  xx.205.30.201/22  ethernet up 01:26:35:C2:73:6D
        eth1:58  (eth1)  xx.205.30.143/22  ethernet up 01:26:35:C2:73:6D
        eth1:59  (eth1)  xx.205.30.36/22   ethernet up 01:26:35:C2:73:6D
        eth1:6   (eth1)  xx.205.29.254/22  ethernet up 01:26:35:C2:73:6D
        eth1:60  (eth1)  xx.205.31.69/22   ethernet up 01:26:35:C2:73:6D
        eth1:61  (eth1)  xx.205.30.219/22  ethernet up 01:26:35:C2:73:6D
        eth1:62  (eth1)  xx.205.31.208/22  ethernet up 01:26:35:C2:73:6D
        eth1:63  (eth1)  xx.205.30.34/22   ethernet up 01:26:35:C2:73:6D
        eth1:64  (eth1)  xx.119.218.90/22  ethernet up 01:26:35:C2:73:6D
        eth1:65  (eth1)  xx.205.30.135/22  ethernet up 01:26:35:C2:73:6D
        eth1:66  (eth1)  xx.205.30.21/22   ethernet up 01:26:35:C2:73:6D
        eth1:68  (eth1)  xx.205.31.124/22  ethernet up 01:26:35:C2:73:6D
        eth1:69  (eth1)  xx.119.218.174/22 ethernet up 01:26:35:C2:73:6D
        eth1:7   (eth1)  xx.205.31.36/22   ethernet up 01:26:35:C2:73:6D
        eth1:70  (eth1)  xx.205.7.91/22    ethernet up 01:26:35:C2:73:6D
        eth1:71  (eth1)  xx.119.218.86/22  ethernet up 01:26:35:C2:73:6D
        eth1:72  (eth1)  xx.205.30.33/22   ethernet up 01:26:35:C2:73:6D
        eth1:73  (eth1)  xx.205.5.71/22    ethernet up 01:26:35:C2:73:6D
        eth1:74  (eth1)  xx.205.28.8/22    ethernet up 01:26:35:C2:73:6D
        eth1:75  (eth1)  xx.119.205.164/22 ethernet up 01:26:35:C2:73:6D
        eth1:76  (eth1)  xx.205.30.27/22   ethernet up 01:26:35:C2:73:6D
        eth1:77  (eth1)  xx.205.6.30/22    ethernet up 01:26:35:C2:73:6D
        eth1:78  (eth1)  xx.205.5.88/22    ethernet up 01:26:35:C2:73:6D
        eth1:79  (eth1)  xx.205.31.119/22  ethernet up 01:26:35:C2:73:6D
        eth1:8   (eth1)  xx.205.5.248/22   ethernet up 01:26:35:C2:73:6D
        eth1:80  (eth1)  xx.205.49.227/22  ethernet up 01:26:35:C2:73:6D
        eth1:81  (eth1)  xx.205.29.47/22   ethernet up 01:26:35:C2:73:6D
        eth1:82  (eth1)  xx.205.7.251/22   ethernet up 01:26:35:C2:73:6D
        eth1:83  (eth1)  xx.205.31.202/22  ethernet up 01:26:35:C2:73:6D
        eth1:84  (eth1)  xx.205.30.126/22  ethernet up 01:26:35:C2:73:6D
        eth1:85  (eth1)  xx.205.4.199/22   ethernet up 01:26:35:C2:73:6D
        eth1:86  (eth1)  xx.205.29.35/22   ethernet up 01:26:35:C2:73:6D
        eth1:87  (eth1)  xx.205.29.93/22   ethernet up 01:26:35:C2:73:6D
        eth1:88  (eth1)  xx.205.4.30/22    ethernet up 01:26:35:C2:73:6D
        eth1:89  (eth1)  xx.205.47.27/22   ethernet up 01:26:35:C2:73:6D
        eth1:9   (eth1)  xx.205.30.69/22   ethernet up 01:26:35:C2:73:6D
        eth1:90  (eth1)  xx.205.31.126/22  ethernet up 01:26:35:C2:73:6D
        eth1:91  (eth1)  xx.205.30.127/22  ethernet up 01:26:35:C2:73:6D
        eth1:92  (eth1)  xx.205.30.17/22   ethernet up 01:26:35:C2:73:6D
        eth1:93  (eth1)  xx.205.29.32/22   ethernet up 01:26:35:C2:73:6D
        eth1:94  (eth1)  xx.205.30.180/22  ethernet up 01:26:35:C2:73:6D
        eth1:95  (eth1)  xx.205.4.69/22    ethernet up 01:26:35:C2:73:6D
        eth1:96  (eth1)  xx.205.29.203/22  ethernet up 01:26:35:C2:73:6D
        eth1:97  (eth1)  xx.205.30.249/22  ethernet up 01:26:35:C2:73:6D
        eth1:98  (eth1)  xx.205.29.54/22   ethernet up 01:26:35:C2:73:6D
        eth1:99  (eth1)  xx.205.30.18/22   ethernet up 01:26:35:C2:73:6D

ROUTES: NONE FOUND(!)

route -n
        /proc/net/route: Permission denied
        INET (IPv4) not configured in this system.

cat /proc/net/route
        cat: /proc/net/route: Permission denied

----- End forwarded message -----

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