[ILUG] Followup 2: Naive ADSL/WiFi questions [ almost no response
from the unit in a local test!? ]
blf at utvinternet.ie
Mon Sep 3 22:43:26 IST 2007
slightly over two months ago, I asked a set of naïve
questions about switching from a 56K dialout straw to
ADSL for my SUSE 9.1 system. about two weeks ago I
asked several follow-up questions. many thanks for
all the helpful suggestions and answers. now for a
the ADSL kit has arrived. it is a Hitach AH4021 (also
known as a Tecom AH4021), a WiFi router with two wired
ethernet connections, NAT, &tc:
general searching finds no obviously significant issues
with this unit, which also seems to be quite commonly
used here in France (and a lot of what I found is en
Français). the unit apparently runs Linux and netfilter.
at the moment, I've no idea if the line has been enabled
(or whatever the term is) for ADSL or not. pending some
information on the status, and needing to get cable(s?)
of the appropriate lengths, I decided to leave the line
not-connected and just try a local test: connect the
AH4021 to the switch via the wired ethernet (and that's
_all_ the unit is connected to!). in theory the unit's
at its factory+ISP default settings (whatever they are!).
eth0, a printer, and the AH4021 are all connected to a
switch. eth0 is (currently) configured as an internal
LAN, and so there _should_ not be any firewalling &tc to
get in the way. the printer is working just fine; I can
print, and I can access its embedded web server via http.
eth0 Link encap:Ethernet HWaddr 00:E0:xx:xx:xx:xx
inet addr:192.168.yy.yy Bcast:192.168.255.255 Mask:255.255.0.0
inet6 addr: [ ... ] Scope:Link
UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1
RX packets:14555 errors:0 dropped:0 overruns:0 frame:0
TX packets:57110 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:3102187 (2.9 Mb) TX bytes:36181737 (34.5 Mb)
Interrupt:10 Base address:0x8f00
[ ... ]
Address HWtype HWaddress Flags Mask Iface
192.168.128.93 ether 00:18:xx:xx:xx:xx C eth0
192.168.1.1 ether 00:19:xx:xx:xx:xx C eth0
192.168.128.93 (00:18:...) is definitely the printer.
192.168.1.1 (00:19:...) should be the AH4021.
unfortunately, the above is as far as I get!
there is no other response: ping(8), nmap(1), telnet(1),
and http://192.168.1.1 (documented as the embedded web
server) all fail to obtain any response at all:
$ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
[... no output, interrupted ...]
--- 192.168.1.1 ping statistics ---
9 packets transmitted, 0 received, 100% packet loss, time 7999ms
$ nmap -v -P0 192.168.1.1
Starting nmap 3.50 ( http://www.insecure.org/nmap/ ) at 2007-09-03 22:31 CEST
Host 192.168.1.1 appears to be up ... good.
Initiating Connect() Scan against 192.168.1.1 at 22:31
The Connect() Scan took 1357 seconds to scan 1659 ports.
All 1659 scanned ports on 192.168.1.1 are: filtered
Nmap run completed -- 1 IP address (1 host up) scanned in 1357.278 seconds
watching eth0 with tcpdump(1) confirms that whilst packets
are going out, nothing is coming back.
the LEDs are broadly what I expect: the switch seems happy,
and the AH4021 has green LAN1 and PWR lit, albeit it has an
orange ATM lit (eh?).
any ideas? tests I should try? I'm disinclined to think
there's a problem with the cable or switch, since it does
seem to be showing up in the ARP table (above); hence, I
haven't (yet?) tried the other wired ethernet (LAN2), or
swapping cables and/or switch connections around, &tc.
▶ ▶ I AM CURRENTLY LOOKING FOR A JOB! ◀ ◀ | Brian Foster
Experienced (>25 yrs) software engineer: | Montpellier, FRANCE
• Unix, Linux, embedded, design-for-test; | Stop E$$o (ExxonMobile)!
• Software/hardware co-design, debugging; | http:/www.stopesso.com
• Kernels, drivers, filesystems, &tc; Résumé (CV) & contact details:
• IDL, automated testing, process, &tc. http://www.blf.utvinternet.ie
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