Date: Sat, 8 Nov 2014 19:41:23 -0700 From: "Gary Aitken" <vagabond@blackfoot.net> To: "Freebsd Questions" <questions@freebsd.org>, "Freebsd Questions" <questions@freebsd.org> Cc: gmx@ross.cx, jon@radel.com Subject: Re: ARP only, no ICMP packets? Message-ID: <b62bfb80fceac3f7a4748f15825edf67.squirrel@webmail.blackfoot.net>
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On 11/08/14 14:24, Michael Ross wrote: > On Sat, 08 Nov 2014 21:33:44 +0100, Gary Aitken <vagabond@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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