I have disabled ipv6 and selinux ...but it is not useful.
some other information is as follows::
[root@localhost ~]# ifconfig -a
eth15 Link encap:Ethernet HWaddr 00:00:6C:46:5D:91
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:388 errors:0 dropped:0 overruns:0 frame:0
TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:37810 (36.9 KiB) TX bytes:1730 (1.6 KiB)
Interrupt:20 Base address:0x6000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:102 errors:0 dropped:0 overruns:0 frame:0
TX packets:102 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5260 (5.1 KiB) TX bytes:5260 (5.1 KiB)
pan0 Link encap:Ethernet HWaddr 2A:A8:75:24

F:75
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:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
virbr0 Link encap:Ethernet HWaddr 8E:2D:62:06:19:99
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:15 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:3408 (3.3 KiB)
[root@localhost ~]# lspci
00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
00:00.1 RAM memory: nVidia Corporation C51 Memory Controller 0 (rev a2)
00:00.2 RAM memory: nVidia Corporation C51 Memory Controller 1 (rev a2)
00:00.3 RAM memory: nVidia Corporation C51 Memory Controller 5 (rev a2)
00:00.4 RAM memory: nVidia Corporation C51 Memory Controller 4 (rev a2)
00:00.5 RAM memory: nVidia Corporation C51 Host Bridge (rev a2)
00:00.6 RAM memory: nVidia Corporation C51 Memory Controller 3 (rev a2)
00:00.7 RAM memory: nVidia Corporation C51 Memory Controller 2 (rev a2)
00:02.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
00:03.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1)
00:05.0 VGA compatible controller: nVidia Corporation C51 [Geforce 6150 Go] (rev a2)
00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2)
00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a3)
00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a3)
00:0a.3 Co-processor: nVidia Corporation MCP51 PMU (rev a3)
00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3)
00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller (rev a3)
00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev f1)
00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev f1)
00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2)
00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev a2)
00:14.0 Bridge: nVidia Corporation MCP51 Ethernet Controller (rev a3)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
07:05.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller
07:05.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
07:05.2 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 0a)
07:05.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 05)
07:05.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev ff)
[root@localhost ~]# lsmod
Module Size Used by
ipt_MASQUERADE 6528 1
iptable_nat 9224 1
nf_nat 18072 2 ipt_MASQUERADE,iptable_nat
bridge 46104 0
bnep 14464 2
rfcomm 34576 4
l2cap 22272 16 bnep,rfcomm
bluetooth 47588 5 bnep,rfcomm,l2cap
ib_iser 30136 0
rdma_cm 26112 1 ib_iser
ib_cm 32080 1 rdma_cm
iw_cm 10884 1 rdma_cm
ib_sa 20296 2 rdma_cm,ib_cm
ib_mad 33432 2 ib_cm,ib_sa
ib_core 43648 6 ib_iser,rdma_cm,ib_cm,iw_cm,ib_sa,ib_mad
ib_addr 9476 1 rdma_cm
iscsi_tcp 18820 0
libiscsi 24576 2 ib_iser,iscsi_tcp
scsi_transport_iscsi 28184 4 ib_iser,iscsi_tcp,libiscsi
fuse 41116 9
sunrpc 151412 3
ipt_REJECT 6784 4
xt_tcpudp 6656 5
nf_conntrack_ipv4 11396 6 iptable_nat,nf_nat
xt_state 5888 3
nf_conntrack 49748 5 ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv 4,xt_state
iptable_filter 6528 1
ip_tables 13840 2 iptable_nat,iptable_filter
ip6_tables 14736 0
x_tables 15236 7 ipt_MASQUERADE,iptable_nat,ipt_REJECT,xt_tcpudp,xt _state,ip_tables,ip6_tables
cpufreq_ondemand 10124 1
powernow_k8 18308 1
loop 16772 0
dm_multipath 18056 0
kvm 88368 0
snd_hda_intel 330144 2
snd_seq_dummy 6660 0
snd_seq_oss 30364 0
snd_seq_midi_event 9600 1 snd_seq_oss
snd_seq 48448 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
sr_mod 17064 0
cdrom 32796 1 sr_mod
snd_seq_device 10124 3 snd_seq_dummy,snd_seq_oss,snd_seq
video 20368 0
snd_pcm_oss 42496 0
snd_mixer_oss 16768 1 snd_pcm_oss
firewire_ohci 21636 0
snd_pcm 67076 2 snd_hda_intel,snd_pcm_oss
output 6656 1 video
firewire_core 34208 1 firewire_ohci
sdhci 16908 0
ricoh_mmc 7552 0
snd_timer 21640 2 snd_seq,snd_pcm
mmc_core 40604 1 sdhci
crc_itu_t 5760 1 firewire_core
snd_page_alloc 11400 2 snd_hda_intel,snd_pcm
snd_hwdep 10500 1 snd_hda_intel
snd 48312 14 snd_hda_intel,snd_seq_dummy,snd_seq_oss,snd_seq,sn d_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd _timer,snd_hwdep
wmi 9640 0
battery 14084 0
button 10000 0
forcedeth 46220 0
pcspkr 6272 0
ac 8068 0
k8temp 7936 0
soundcore 9288 1 snd
hwmon 6300 1 k8temp
i2c_nforce2 9216 0
i2c_core 20628 1 i2c_nforce2
joydev 12608 0
pata_amd 13444 0
sg 31028 0
dm_snapshot 18468 0
dm_zero 5632 0
dm_mirror 26116 0
dm_mod 48980 9 dm_multipath,dm_snapshot,dm_zero,dm_mirror
pata_acpi 8192 0
ata_generic 8964 0
sata_nv 23048 5
libata 126688 4 pata_amd,pata_acpi,ata_generic,sata_nv
sd_mod 25624 6
scsi_mod 120820 8 ib_iser,iscsi_tcp,libiscsi,scsi_transport_iscsi,sr _mod,sg,libata,sd_mod
ext3 108424 2
jbd 40852 1 ext3
mbcache 10116 1 ext3
uhci_hcd 22928 0
ohci_hcd 22276 0
ehci_hcd 32268 0
[root@localhost ~]#