The Proxy refusing Connection Ubuntu 12.04.02

ntu929 · 01-13-2014, 04:14 AM

Hi All,

I am having Dell inspiron 1545 laptop. When I connect to a wifi network, the connection gets established as I get the notification towards the right side of the screen.

I have set up ip properly according to the system administrator here. The proxy is set at the web browser level using Edit->preferences->Advanced->Network->Settings.

But inspite of this when I open Firefox, I get error message as:-

The proxy server is refusing connections.

iwconfig command returns result as follows:-

Code:

nakul@nakul-Inspiron-1545:~$ iwconfig 
lo        no wireless extensions.

eth0      no wireless extensions.

eth1      IEEE 802.11abg  ESSID:"it dept"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:13:F7:7C:7D:56   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          
nakul@nakul-Inspiron-1545:~$

lshw returns results as follows:-

Code:

nakul@nakul-Inspiron-1545:~$ sudo lshw -class network
[sudo] password for nakul: 
  *-network               
       description: Wireless interface
       product: BCM4312 802.11b/g LP-PHY
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:0c:00.0
       logical name: eth1
       version: 01
       serial: 00:25:56:96:0b:be
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=wl0 driverversion=6.20.155.1 (r326264) ip=172.16.101.100 latency=0 multicast=yes wireless=IEEE 802.11abg
       resources: irq:17 memory:f69fc000-f69fffff
  *-generic
       description: Ethernet interface
       product: Illegal Vendor ID
       vendor: Illegal Vendor ID
       physical id: 0
       bus info: pci@0000:09:00.0
       logical name: eth0
       version: ff
       serial: 00:25:64:3d:da:7f
       capacity: 100Mbit/s
       width: 32 bits
       clock: 66MHz
       capabilities: bus_master vga_palette cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 latency=255 link=no maxlatency=255 mingnt=255 multicast=yes port=twisted pair
       resources: irq:45 memory:f68fc000-f68fffff ioport:de00(size=256)

Code:

lspci command returns following result:-

nakul@nakul-Inspiron-1545:~$ sudo lspci -vnn -d 14e4:
0c:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
	Subsystem: Dell Wireless 1397 WLAN Mini-Card [1028:000c]
	Flags: bus master, fast devsel, latency 0, IRQ 17
	Memory at f69fc000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [40] Power Management version 3
	Capabilities: [58] Vendor Specific Information: Len=78 <?>
	Capabilities: [e8] MSI: Enable- Count=1/1 Maskable- 64bit+
	Capabilities: [d0] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [13c] Virtual Channel
	Capabilities: [160] Device Serial Number 0b-be-56-ff-ff-96-00-25
	Capabilities: [16c] Power Budgeting <?>
	Kernel driver in use: wl
	Kernel modules: wl, ssb

lspci returns following result:-

nakul@nakul-Inspiron-1545:~$ lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 03)
00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
09:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8040 PCI-E Fast Ethernet Controller (rev ff)
0c:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
nakul@nakul-Inspiron-1545:~$

Code:

lsmod returns the following result:-

nakul@nakul-Inspiron-1545:~$ lsmod
Module                  Size  Used by
nls_iso8859_1          12618  1 
joydev                 17394  0 
btusb                  17952  0 
coretemp               13362  0 
snd_hda_codec_idt      60238  1 
gpio_ich               13160  0 
dell_wmi               12602  0 
sparse_keymap          13659  1 dell_wmi
snd_hda_intel          32983  3 
snd_hda_codec         116477  2 snd_hda_codec_idt,snd_hda_intel
snd_hwdep              13277  1 snd_hda_codec
snd_pcm                81124  2 snd_hda_intel,snd_hda_codec
dell_laptop            17210  0 
dcdbas                 14099  1 dell_laptop
snd_seq_midi           13133  0 
snd_rawmidi            25426  1 snd_seq_midi
microcode              18396  0 
snd_seq_midi_event     14476  1 snd_seq_midi
psmouse                91408  0 
serio_raw              13032  0 
lpc_ich                16993  0 
snd_seq                51594  2 snd_seq_midi,snd_seq_midi_event
lib80211_crypt_tkip    17276  0 
bnep                   17791  2 
parport_pc             32115  0 
rfcomm                 38104  12 
snd_timer              28932  2 snd_pcm,snd_seq
snd_seq_device         14138  3 snd_seq_midi,snd_rawmidi,snd_seq
ppdev                  12850  0 
bluetooth             189625  24 btusb,bnep,rfcomm
wl                   2906598  0 
wmi                    18745  1 dell_wmi
snd                    62675  15 snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
binfmt_misc            17293  1 
cfg80211              181041  1 wl
i915                  479306  3 
mac_hid                13078  0 
lib80211               14041  2 lib80211_crypt_tkip,wl
drm_kms_helper         47459  1 i915
soundcore              14636  1 snd
snd_page_alloc         14109  2 snd_hda_intel,snd_pcm
drm                   240443  4 i915,drm_kms_helper
i2c_algo_bit           13317  1 i915
video                  19117  1 i915
lp                     17456  0 
parport                40931  3 parport_pc,ppdev,lp
hid_generic            12485  0 
usbhid                 46054  0 
ums_realtek            17929  0 
hid                    82511  2 hid_generic,usbhid
usb_storage            39720  2 ums_realtek
sky2                   53629  0 
ahci                   25621  4 
libahci                26166  1 ahci

the contents of /etc/network/interface has following contents

Code:

auto lo
iface lo inet loopback

Please tell how to solve this problem

Thanking you,

acid_kewpie · 01-13-2014, 05:08 AM

You have far too many unrelated things in here. You can not cover wifi drivers and connectivity to a proxy server in a single thing. You need to split these things down and isolate clearly where the issue is. Are you connected to wifi? are you able to ping the proxy etc.

ntu929 · 01-13-2014, 06:09 AM

Quote:

Originally Posted by acid_kewpie

You have far too many unrelated things in here. You can not cover wifi drivers and connectivity to a proxy server in a single thing. You need to split these things down and isolate clearly where the issue is.

Yes I have tried to now focus only on one issue,

connecting to internet using wifi network . I have made the changes to the original post accordingly.

Quote:

Originally Posted by acid_kewpie

Are you connected to wifi? are you able to ping the proxy etc.

Ping returns following result

Code:

root@nakul-Inspiron-1545:~# ping 172.16.99.99
PING 172.16.99.99 (172.16.99.99) 56(84) bytes of data.
From 172.16.101.100 icmp_seq=1 Destination Host Unreachable
From 172.16.101.100 icmp_seq=2 Destination Host Unreachable
From 172.16.101.100 icmp_seq=3 Destination Host Unreachable
From 172.16.101.100 icmp_seq=4 Destination Host Unreachable
From 172.16.101.100 icmp_seq=5 Destination Host Unreachable
From 172.16.101.100 icmp_seq=6 Destination Host Unreachable
From 172.16.101.100 icmp_seq=8 Destination Host Unreachable
From 172.16.101.100 icmp_seq=9 Destination Host Unreachable
From 172.16.101.100 icmp_seq=10 Destination Host Unreachable
From 172.16.101.100 icmp_seq=11 Destination Host Unreachable
From 172.16.101.100 icmp_seq=12 Destination Host Unreachable
From 172.16.101.100 icmp_seq=13 Destination Host Unreachable
From 172.16.101.100 icmp_seq=14 Destination Host Unreachable
^Z

nm-tool command gives me following result:-

Code:

root@nakul-Inspiron-1545:~# nm-tool

NetworkManager Tool

State: connected (global)

- Device: eth1  [it dept] ------------------------------------------------------
  Type:              802.11 WiFi
  Driver:            wl
  State:             connected
  Default:           yes
  HW Address:        00:25:56:96:0B:BE

  Capabilities:
    Speed:           48 Mb/s

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points (* = current AP)
    *it dept:        Infra, 00:13:F7:7C:7D:56, Freq 2437 MHz, Rate 54 Mb/s, Strength 58 WEP
    COMPUTER:        Infra, 00:13:F7:7C:6B:D1, Freq 2437 MHz, Rate 54 Mb/s, Strength 19 WEP

  IPv4 Settings:
    Address:         172.16.101.100
    Prefix:          16 (255.255.0.0)
    Gateway:         172.16.99.99

    DNS:             8.8.8.8

I am connected to the network as it is evident from the above result.

I hope am now clear.

acid_kewpie · 01-13-2014, 10:25 AM

No, that doesn't show you're connected to the network, that shows you've been given a DHCP lease from somewhere, but there's no sign of anything on the network being reached. We can see that you can't reach your defined default gateway, so there's something pretty broken there somewhere.

Does your ARP cache shoudl any other local Ethernet devices at all? Can you ping anything else?