Re: [gentoo-user] Configuring hostapd

[Fernando Rodriguez]

On Thursday, August 06, 2015 7:04:27 AM Cor Legemaat wrote:
> On Wed, 2015-08-05 at 01:00 -0400, Fernando Rodriguez wrote:
> > On Tuesday, August 04, 2015 8:18:43 PM Cor Legemaat wrote:
> > > On Sun, 2015-08-02 at 19:56 -0400, Fernando Rodriguez wrote:
> > > > On Sunday, August 02, 2015 11:12:07 PM Mick wrote:
> > > > > On Sunday 02 Aug 2015 22:04:41 Fernando Rodriguez wrote:
> > > > > > On Sunday, August 02, 2015 1:29:50 PM Mick wrote:
> > > > > > > On Sunday 02 Aug 2015 01:50:21 Fernando Rodriguez wrote:
> > > > > > > > Hello,
> > > > > > > >
> > > > > > > > After installing hostapd I can successfully connect to
> > > > > > > > the
> > > > > > > > AP, I can
> > > > > > > > get DHCP from it, but I cannot access the network
> > > > > > > > through it
> > > > > > > > (neither
> > > > > > > > lan or internet).
> > > > > > >
> > > > > > > This sounds like a (network) routing problem, rather than a
> > > > > > > hostapd
> > > > > > > issue.
> > > > > >
> > > > > > It looks like that, but if I stop iptables completely on the
> > > > > > router all
> > > > > > unicast traffic still works in the lan (both wired and
> > > > > > through
> > > > > > an external
> > > > > > AP), so if I connect to the hostapd AP with iptables off,
> > > > > > shouldn't I at
> > > > > > the very least be able to ping the wireless interface on the
> > > > > > router?
> > > > > >
> > > > > > I also tried with only the following rule which enables
> > > > > > internet
> > > > > > access to
> > > > > > all wired workstations and through external AP:
> > > > > >
> > > > > > iptables -t nat -A POSTROUTING -o enp0s8 -j MASQUERADE
> > > > >
> > > > > You should probably specify the local subnet, so that multicast
> > > > > packets are
> > > > > not sent out to the Internet, e.g.:
> > > > >
> > > > > iptables -t nat -A POSTROUTING -o enp0s8 -s 192.168.1.0/24 ! -d
> > > > 192.168.1.0/24
> > > > > -j MASQUERADE
> > > > >
> > > > > (Change 192.168.1.0/24 to suit your LAN subnet)
> > > >
> > > > I'm not actually using that rule except as a minimal setup for
> > > > troubleshooting
> > > > this issue. My actual rules do specify the subnet.
> > > >
> > > > > Also have you enabled ip forwarding in your kernel:
> > > > >
> > > > > sysctl -w net.ipv4.ip_forward=1
> > > >
> > > > Yes, it is an existing router that works perfectly except for the
> > > > hostapd AP.
> > > > My current setup is as follows:
> > > >
> > > > Internet -> Gentoo Router -> Switch -> AP
> > > >
> > > > Where AP is a wifi router with routing features disabled. Never
> > > > had
> > > > problems
> > > > with it. Now I installed hostapd on "Gentoo Router" and
> > > > everything
> > > > else still
> > > > works fine except when I connect to the hostapd AP. Even with
> > > > only
> > > > that minimal
> > > > iptable rule or no rules at all.
> > > >
> > > > Thanks,
> > > >
> > > Probably /dev/random depleated, try enable your hardware rng or
> > > sys-
> > > apps/haveged test with `cat /proc/sys/kernel/random/entropy_avail`
> > >
> > > Regards:
> > > Cor
> >
> > Thanks. II did get an error about depleted entropy at some point
> > when starting
> > hostapd but I went ahead and installed haveged and it still doesn't
> > work. It
> > doesn't even work when configured as an open AP. I checked the
> > kernel config and
> > I had VLAN support disabled. I've rebuilt it but can't reboot right
> > now. Maybe
> > it's required even though I'm not using VLANs?
> >
> Is there an IP configured on the interface or the bridge of that
> interface?

Yes

> Can you ping your gateway?

No...I can ping it locally or remotely when I connect through the external AP 
but not through hostapd.

> If I'm correct dhcp uses
> broadcast but you need a valid gateway IP switchable on mac layer.
>
> Does it stay connected?

Yes

> I have a problem with a link between hostapd
> and a mikrotik device on 802.11a where I needed to patch hostapd to
> get it to stay connected. But that should show in hostapd debug logs.
> Mine is still running on hostapd-2.3 because if I update and screw it
> my internet is broken, if that's your problem I will search for my
> notes and mail it.

Tried hostapd-2.3 too, same thing.
I will try it on a laptop with a more recent adapter tomorrow to rule that 
out.

> Regards:
> Cor

-- 
Fernando Rodriguez