unable to ping my server host computer from any outside computer

Hi

I have the latest version of Ubuntu Feisty. I am unable to ping my host computer (the computer my Samba server is running on) from an outside computer (I have tried 4 different computers). I am also having trouble pinging websites such as google or yahoo from my host computer; however, I have internet connectivity. I am operating behind a linksys wireless router acting as a dhcp server (firewall disabled). I've pasted the smb.conf file and some ping statistics below. Any help would be appreciated

eth0 Link encap:Ethernet HWaddr 00:30:1B:3A:EB:F4
          UP BROADCAST MULTICAST MTU:1500 Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
          Interrupt:11 Base address:0xe000

lo Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:227 errors:0 dropped:0 overruns:0 frame:0
          TX packets:227 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:19039 (18.5 KiB) TX bytes:19039 (18.5 KiB)

rausb1 Link encap:Ethernet HWaddr 00:12:17:8F:E3:DE
          inet addr:192.168.1.107 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::212:17ff:fe8f:e3de/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:24107 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24407 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:18417373 (17.5 MiB) TX bytes:3366998 (3.2 MiB)

here is the smb.conf

[global]
netbios name = abode
server string =
workgroup = OfficetoHome
hosts allow =
printcap name = /etc/printcap
load printers = yes
printing = cups
cups options = raw
guest account =
log file = /var/log/samba/samba.log
max log size = 1000
security = user
username level = 8
password level = 8
username map = /etc/samba/smbusers
add user script = /usr/sbin/useradd -d /dev/null -g sambamachines -c 'Samba Machine Account' -s /dev/null -M '%u'
smb passwd file = /etc/samba/smbpasswd
encrypt passwords = yes
unix password sync = yes
passwd program = /usr/bin/passwd '%u'
passwd chat = *New*UNIX*password* %n\n *ReType*new*UNIX*password* %n\n *passwd:*all*authentication*tokens*updated*successfully*\n
null passwords = no
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
interfaces =
local master = no
os level = 33
domain master = no
preferred master = no
time server = no
domain logons = no
logon drive = m:
logon home = \\%L\homes\%u
logon path = \\%L\profiles\%u
logon script = %G.bat
name resolve order = wins lmhosts bcast
wins support = no
wins server =
wins proxy = no
dns proxy = no
preserve case = no
winbind use default domain = yes
idmap uid = 16777216-33554431
idmap gid = 16777216-33554431
template shell = /dev/null

[netlogon]
comment = Network Logon Service
path = /home/netlogon
read only = no
available = yes
browseable = yes
writable = no
guest ok = no
public = no
printable = no
share modes = no
locking = no

[profiles]
comment = User Profiles
path = /home/profiles
read only = no
available = yes
browseable = no
writable = yes
guest ok = no
public = no
printable = no
locking = no
create mode = 0600
directory mask = 0700

[printers]
comment = All Printers
path = /var/spool/samba
browseable = yes
writable = no
guest ok = no
public = no
printable = yes
share modes = no
locking = no

[pdf-documents]
path = /home/pdf-documents
comment = Converted PDF Documents
available = yes
browseable = yes
writeable = yes
guest ok = yes

[pdf-printer]
path = /tmp
comment = PDF Printer Service
printable = yes
guest ok = yes
use client driver = yes
printing = bsd
print command = /usr/bin/gsambadpdf %s %u
lpq command =
lprm command =

[home]
path = /home
comment = Need to have access to home before you can access anything else
valid users = davidkarapetyan
write list =
admin users =
read only = no
available = yes
browseable = yes
writable = no
guest ok = no
public = no
printable = no
share modes = no
locking = no

[Backup]
path = /Backup
comment = Seagate 500 Gig HD
valid users = davidkarapetyan
write list =
admin users =
read only = no
available = yes
browseable = yes
writable = yes
guest ok = no
public = no
printable = no
share modes = no
locking = no

here is netstat-rn

Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 rausb1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 rausb1
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 rausb1