Configuration Files for Specialized Router for Work

I thought that I would record the configuration files that I used for the Specialized Router here, so that I would have something to reference in the future.  The setup here assumes that I have a common SSID that I connect to both at home and at work.  At home, I have a separate SSID that I have set up on my primary router and on the WAP that I have downstairs.  The channel number is not the same in both places, but the RPi software looks for the SSID and does the connection.  At work, I use a DIR-505L router which is set to wifi hotspot mode with the same SSID but is connected to the guest wifi SSID at work.  Assuming that hostapd and isc-dhcp-server are installed, the configuration files are as follows:

(1) /etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
    ssid="CairParavelClone"
        psk="p19dsndgyxhrh$AM"
        proto=WPA
    key_mgmt=WPA-PSK
        pairwise=TKIP
    auth_alg=OPEN
}

(2) /etc/default/isc-dhcp-server

# Path to dhcpd's config file (default: /etc/dhcp/dhcpd.conf).
DHCPD_CONF=/etc/dhcp/dhcpd_test.conf

# Path to dhcpd's PID file (default: /var/run/dhcpd.pid).
DHCPD_PID=/var/run/dhcpd_test.pid

# Additional options to start dhcpd with.
#    Don't use options -cf or -pf here; use DHCPD_CONF/ DHCPD_PID instead
#OPTIONS=""

# On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
#    Separate multiple interfaces with spaces, e.g. "eth0 eth1".
INTERFACES="wlan1"

(3) /etc/network/interfaces

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
#iface default inet dhcp

allow-hotplug wlan1
#auto wlan1
iface wlan1 inet static
   address 192.168.42.1
   netmask 255.255.255.0
   network 192.168.42.0

up iptables-restore < /etc/iptables.ipv4.nat

(4) /etc/hostapd/hostapd.conf

interface=wlan1
ssid=Pi_AP
hw_mode=g
channel=9
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=Raspberry
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP

(5) /etc/dhcp/dhcpd_test.conf

ddns-update-style none;

default-lease-time 600;
max-lease-time 7200;

authoritative;

subnet 192.168.42.0 netmask 255.255.255.0 {
range 192.168.42.100 192.168.42.120;
option broadcast-address 192.168.42.255;
option routers 192.168.42.1;
default-lease-time 600;
max-lease-time 7200;
option domain-name "local";
option domain-name-servers 8.8.8.8, 8.8.4.4;
}

(6) /etc/iptables.ipv4.nat

# Generated by iptables-save v1.4.14 on Sat Jan 24 16:37:01 2015
*nat
:PREROUTING ACCEPT [217:54744]
:INPUT ACCEPT [4:751]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -o wlan0 -j MASQUERADE
COMMIT
# Completed on Sat Jan 24 16:37:01 2015
# Generated by iptables-save v1.4.14 on Sat Jan 24 16:37:01 2015
*filter
:INPUT ACCEPT [256:19656]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [136:13904]
-A FORWARD -i wlan0 -o wlan1 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i wlan1 -o wlan0 -j ACCEPT
COMMIT
# Completed on Sat Jan 24 16:37:01 2015

That is about it for right now.  Updates to follow when I get the Netgear G54/N150 nano adapters to be more stable.