ARP only, no ICMP packets?
Gary Aitken
vagabond at blackfoot.net
Sun Nov 9 02:41:26 UTC 2014
On 11/08/14 14:24, Michael Ross wrote:
> On Sat, 08 Nov 2014 21:33:44 +0100, Gary Aitken <vagabond at blackfoot.net>
wrote:
> > After reconfiguring my internal network to private ip addrs,
> > I'm trying to reconfigure a DLink wireless access point.
> > At first I tried using the old IP addrs and configuring my
> > workstation with an alias on the old network. That didn't
> > work, so I've reset the wap. The manual says default addr is
> > 192.168.0.50 netmask 255.255.255.0
> > The box I'm trying to access it from has an ip of 192.168.151.122/24.
> > I've added an alias to the interface for the 192.168.0 subnet:
> > Routing tables
> > Internet:
> > Destination Gateway Flags Refs Use Netif
Expire
> > default 192.168.151.101 UGS 0 0 re0
> > 127.0.0.1 link#10 UH 0 59752 lo0
> > 192.168.0.0/24 link#1 U 0 121 re0
> > 192.168.0.122 link#1 UHS 0 0 lo0
> > 192.168.151.0/24 link#1 U 0 54 re0
> > 192.168.151.122 link#1 UHS 0 0 lo0
> > When I attempt to access the WAP, I see only ARP requests,
> > and it appears not to answer:
> > $ arp -n -a
> > ? (192.168.151.122) at f4:6d:04:78:70:62 on re0 permanent [ethernet]
> > ? (192.168.0.122) at f4:6d:04:78:70:62 on re0 permanent [ethernet]
> > ? (192.168.151.101) at 00:01:02:c2:a1:a8 on re0 expires in 339 seconds
[ethernet]
> > # tcpdump -flnt -i re0 | grep 192.168.0.50
> > tcpdump: verbose output suppressed, use -v or -vv for full protocol
decode
> > listening on re0, link-type EN10MB (Ethernet), capture size 65535 bytes
> > ARP, Request who-has 192.168.0.50 tell 192.168.0.122, length 28
> No ARP reply...
>
> > I have difficulty believing the wap unit is defective, as
> > "it worked before I changed all the addresses..."
>
> Maybe not defective as such, but some DLinks ( mine for example )
> ignore everything not originating from their own /24,
> so unless packets come from 192.168.0.x, they will be silently
> discarded.
In this case, they are originating from 192.168.0.122, so should be ok there.
(see ARP request above)
On 11/08/14 16:34, Jon Radel wrote:
> Have you swept the /24 on the off chance that the manual is fibbing about
> 192.168.0.50 but not about it being some address in 192.168.0.0/24? If
> that fails, try 192.168.1.0/24. Other addresses D-Link seems to favor as
> the default:
> 192.168.0.1
> 192.168.0.30
> 192.168.1.1
Thanks.
Yes, I swept all of 192.168.0.* and .1.*
nada.
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