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  • how does scrolling in android listview work?

    - by gartenkralleb
    hi, i have an android-app with a listview in an activity. the listview has, if i call it so, three data states. no data loaded from inet - only one dummy item is visible, saying that data is loading data is loaded and shown in list one listitem is clicked and now shows more information for this listitem (so it is increased in its height) on every state change (1 - 2, 2 - 3) i call notifyDataSetChanged() on this ListAdapater. this causes the listview to scroll down to the last item. this is ugly in the first transition and even more ugly in the second because the clicked list item is now out of focus. as i can see, this happens with a google g1 with android 1.6. a htc touch with the same sdk acts like desired (i try to figure it out with some more devices). to avoid this i tried to read out getScrollY() and set this value back. but this returns 0. the reason for this return value i already found on stackoverflow in other qutestions. does anyone else comes along with my problem so far? why does the listview scrolls to the last item? it was mentioned, that listview does keep track on the scroll position. but it seems that it does not in my case. or may i call the wrong refresh method? is notifyDataSetChanged the correct one?

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  • Handling Erlang inets http client errors

    - by Justin
    I have an Erlang app which makes a large number of http calls to external sites using inets, using the code below case http:request(get, {Url, []}, [{autoredirect, false}], []) of {ok, {{_, Code, _}, _, Body}}-> case Code of 200 -> HandlerFn(Body); _ -> {error, io:format("~s returned HTTP ~p", [Broker, Code])} end; Response -> %% block to handle unexpected responses from inets {error, io:format("~s returned ~p", [Broker, Response])} end. There is an explicit block to handle anything strange inets might return [Response]. Despite this, I still get what look like inets error reports dumped to the console [sample below]. What am I doing wrong here ? Do I need to configure some kind of inets error handler elsewhere ? Thanks. -- =ERROR REPORT==== 24-Apr-2010::06:49:47 === ** Generic server <0.6618.0 terminating ** Last message in was {connect_and_send, {request,#Ref<0.0.0.139358,<0.6613.0,0,http, {"***",80}, "****************", [],get, {http_request_h,undefined,"keep-alive", undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,undefined,"news.bbc.co.uk", undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,[],undefined,undefined,undefined, undefined,"0",undefined,undefined, undefined,undefined,undefined,undefined,[]}, {[],[]}, {http_options,"HTTP/1.1",infinity,false,[], undefined,false,infinity}, "*******************", [],none,[],1272088179114,undefined,undefined}} * When Server state == {state, {request,#Ref<0.0.0.139358,<0.6613.0,0,http, {"********",80}, "***************", [],get, {http_request_h,undefined,"keep-alive", undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,undefined,"news.bbc.co.uk", undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,[],undefined,undefined, undefined,undefined,"0",undefined, undefined,undefined,undefined,undefined, undefined,[]}, {[],[]}, {http_options,"HTTP/1.1",infinity,false,[], undefined,false,infinity}, "**********************", [],none,[],1272088179114,undefined,undefined}, undefined,undefined,undefined,undefined,undefined, {[],[]}, {[],[]}, undefined,[],nolimit,nolimit, {options, {undefined,[]}, 0,2,5,120000,2,disabled,false,inet,default, default,[]}, {timers,[],undefined}, httpc_manager,undefined} ** Reason for termination == ** {error,{connect_failed,{#Ref<0.0.0.139358,{error,nxdomain}}}} =ERROR REPORT==== 24-Apr-2010::06:49:47 === HTTPC-MANAGER handler (<0.6618.0, started) failed to connect and/or send request #Ref<0.0.0.139358 Result: {error,{connect_failed,{#Ref<0.0.0.139358,{error,nxdomain}}}}

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  • Object Oriented Perl interface to read from and write to a socket

    - by user654967
    I need a perl client-server implementation as a wrapper for a server in C#. A perl script passes the server address and port number and an input string to a module, this module has to create the socket and send the input string to the server. The data sent has to follow ISO-8859-1 encoding. On receiving the information, the client has to first receive 3 byte, then the next 8 bytes, this has the length of the data that has to be received next.. so based on the length the client has to read the next data. each of the data that is read has to be stored in a variable and sent another module for further processing. Currently this is what my perl client looks like..which I'm sure isn't right..could someone tell me how to do this..and set me on the right direction.. sub WriteInfo { my ($addr, $port, $Input) = @_; $socket = IO::Socket::INET->new( Proto => "tcp", PeerAddr => $addr, PeerPort => $port, ); unless ($socket) { die "cannot connect to remote" } while (1) { $socket->send($Input); } } sub ReadData { while (1) { my $ExecutionResult = $socket->recv( $recv_data, 3); my $DataLength = $socket->recv( $recv_data, 8); $DataLength =~ s/^0+// ; my $decval = hex($DataLength); my $Data = $socket->recv( $recv_data, $decval); return($Data); } thanks a lot.. Archer

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  • User input in Perl with IO::Socket

    - by David
    I am trying to make a perl program which allows a user to input the host and the port number of a foreign host to connect to using IO::Socket. It allows me to run the program and input a host and a port but it never connects and says "Could not connect to [host] at c:\users\USER\Documents\code\perl\sql.pl line 18, line 2." What am i doing wrong with this code shown below? And also, how can i have input validation on my host, which can either be a host name or an ip address? Thanks a bunch! Code Below use IO::Socket print "Host to connect to: "; chomp ($host = <STDIN>); print "Port to connect with: "; chomp ($port = <STDIN>); while(($port > 65535) || ($port <= 0)){ print "Port to connect with [Port > 0 < 65535] : "; chomp ($port = <STDIN>); } print "\nConnecting to host $host on port $port\n"; $socket = new IO::Socket::INET ( LocalHost => '$host', LocalPort => '$port', Proto => 'tcp', Listen => 5, Reuse => 1 ); die "Could not connect to $host";

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  • C: incompatible types in assignment

    - by The.Anti.9
    I'm writing a program to check to see if a port is open in C. One line in particular copies one of the arguments to a char array. However, when I try to compile, it says: error: incompatible types in assignment Heres the code. The error is on the assignment of addr #include <sys/socket.h> #include <sys/time.h> #include <sys/types.h> #include <arpa/inet.h> #include <netinet/in.h> #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <netdb.h> #include <stdlib.h> #include <string.h> #include <unistd.h> int main(int argc, char **argv) { u_short port; /* user specified port number */ char addr[1023]; /* will be a copy of the address entered by u */ struct sockaddr_in address; /* the libc network address data structure */ short int sock = -1; /* file descriptor for the network socket */ port = atoi(argv[1]); addr = strncpy(addr, argv[2], 1023); bzero((char *)&address, sizeof(address)); /* init addr struct */ address.sin_addr.s_addr = inet_addr(addr); /* assign the address */ address.sin_port = htons(port); /* translate int2port num */ sock = socket(AF_INET, SOCK_STREAM, 0); if (connect(sock,(struct sockaddr *)&address,sizeof(address)) == 0) { printf("%i is open\n", port); } if (errno == 113) { fprintf(stderr, "Port not open!\n"); } close(sock); return 0; } I'm new to C, so I'm not sure why it would do this.

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  • C: socket connection timeout

    - by The.Anti.9
    I have a simple program to check if a port is open, but I want to shorten the timeout length on the socket connection because the default is far too long. I'm not sure how to do this though. Here's the code: #include <sys/socket.h> #include <sys/time.h> #include <sys/types.h> #include <arpa/inet.h> #include <netinet/in.h> #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <netdb.h> #include <stdlib.h> #include <string.h> #include <unistd.h> int main(int argc, char **argv) { u_short port; /* user specified port number */ char addr[1023]; /* will be a copy of the address entered by u */ struct sockaddr_in address; /* the libc network address data structure */ short int sock = -1; /* file descriptor for the network socket */ if (argc != 3) { fprintf(stderr, "Usage %s <port_num> <address>", argv[0]); return EXIT_FAILURE; } address.sin_addr.s_addr = inet_addr(argv[2]); /* assign the address */ address.sin_port = htons(atoi(argv[2])); /* translate int2port num */ sock = socket(AF_INET, SOCK_STREAM, 0); if (connect(sock,(struct sockaddr *)&address,sizeof(address)) == 0) { printf("%i is open\n", port); } close(sock); return 0; }

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  • em1: watchdog timeout -- resetting virtualbox

    - by lightmanhk
    everyone. I try to configure network adapter of my freebsd on virtualbox machine. At first setting up, I got it right. However, after a couple of reboots, my VM gives me a error message: says "em1:Watchdog timeout -- resetting" I tried to google it, and there is no solution that works for me. The following is my network adapter of my VM: Apapter1: NAT Adapter2: Host-only Adapter vboxnet0 On my Virtualbox setting: Host-only networks: Adapter: IPv4 address: 192.168.56.10 IPv4 network mask: 255.255.255.0 On my FreeBSD VM /etc/rc.conf ifconfig_em0="DHCP" ifconfig_em1="inet 192.168.56.11 netmask 255.255.255.0" Moreover, strange thing is that, for example, if timeout error message show at ttyv0 , when I log in at different ttyv[1-9], the error message will not be shown. but in ttyv0, it still gives me the message. And, in term of functionality of em1, it does work. I have no clue about this problem. Hoping any one can give me a solution or suggestion. That will be great! Thanks a lot. Freebsd version: 9.0-RELEASE FreeBSD 9.0-RELEASE i386 Virtual box: 4.1.2 r73507

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  • Perl TCP Server handling multiple Client connections

    - by Matt
    I'll preface this by saying I have minimal experience with both Perl and Socket programming, so I appreciate any help I can get. I have a TCP Server which needs to handle multiple Client connections simultaneously and be able to receive data from any one of the Clients at any time and also be able to send data back to the Clients based on information it's received. For example, Client1 and Client2 connect to my Server. Client2 sends "Ready", the server interprets that and sends "Go" to Client1. The following is what I have written so far: my $sock = new IO::Socket::INET { LocalHost => $host, // defined earlier in code LocalPort => $port, // defined earlier in code Proto => 'tcp', Listen => SOMAXCONN, Reuse => 1, }; die "Could not create socket $!\n" unless $sock; while ( my ($new_sock,$c_addr) = $sock->accept() ) { my ($client_port, $c_ip) = sockaddr_in($c_addr); my $client_ipnum = inet_ntoa($c_ip); my $client_host = ""; my @threads; print "got a connection from $client_host", "[$client_ipnum]\n"; my $command; my $data; while ($data = <$new_sock>) { push @threads, async \&Execute, $data; } } sub Execute { my ($command) = @_; // if($command) = "test" { // send "go" to socket1 print "Executing command: $command\n"; system($command); } I know both of my while loops will be blocking and I need a way to implement my accept command as a thread, but I'm not sure the proper way of writing it.

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  • Networking- Wireless and Wired not working

    - by JJ White
    So everything in Ubuntu has been working great until networking stopped working. I've spent the better part of two days scouring for a fix with no luck. Here is my info...your help would so be appreciated. grep -i eth /var/log/syslog | tail Sep 25 16:31:59 jj-laptop NetworkManager[970]: <info> (eth0): cleaning up... Sep 25 16:31:59 jj-laptop NetworkManager[970]: <info> (eth0): taking down device. Sep 25 16:31:59 jj-laptop kernel: [23403.998837] sky2 0000:02:00.0: eth0: disabling interface Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): now managed Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): bringing up device. Sep 25 16:35:54 jj-laptop kernel: [23413.629424] sky2 0000:02:00.0: eth0: enabling interface Sep 25 16:35:54 jj-laptop kernel: [23413.635703] ADDRCONF(NETDEV_UP): eth0: link is not ready Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): preparing device. Sep 25 16:35:54 jj-laptop NetworkManager[970]: <info> (eth0): deactivating device (reason 'managed') [2] and then ifconfig -a eth0 Link encap:Ethernet HWaddr 00:17:42:14:e9:e1 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:4605 errors:0 dropped:0 overruns:0 frame:0 TX packets:287 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:315161 (315.1 KB) TX bytes:63680 (63.6 KB) Interrupt:16 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:13018 errors:0 dropped:0 overruns:0 frame:0 TX packets:13018 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:880484 (880.4 KB) TX bytes:880484 (880.4 KB) wlan0 Link encap:Ethernet HWaddr 00:13:02:d0:ee:13 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) also iwconfig lo no wireless extensions. wlan0 IEEE 802.11abg ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=off Retry long limit:7 RTS thr:off Fragment thr:off Power Management:on eth0 no wireless extensions. and of course sudo lshw -C network *-network description: Ethernet interface product: 88E8055 PCI-E Gigabit Ethernet Controller vendor: Marvell Technology Group Ltd. physical id: 0 bus info: pci@0000:02:00.0 logical name: eth0 version: 12 serial: 00:17:42:14:e9:e1 size: 1Gbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 duplex=full firmware=N/A latency=0 link=no multicast=yes port=twisted pair speed=1Gbit/s resources: irq:44 memory:f0000000-f0003fff ioport:2000(size=256) memory:c0a00000-c0a1ffff *-network DISABLED description: Wireless interface product: PRO/Wireless 3945ABG [Golan] Network Connection vendor: Intel Corporation physical id: 0 bus info: pci@0000:05:00.0 logical name: wlan0 version: 02 serial: 00:13:02:d0:ee:13 width: 32 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwl3945 driverversion=3.2.0-31-generic firmware=15.32.2.9 latency=0 link=no multicast=yes wireless=IEEE 802.11abg resources: irq:45 memory:c0100000-c0100fff last but not least lsmod Module Size Used by nls_iso8859_1 12617 0 nls_cp437 12751 0 vfat 17308 0 fat 55605 1 vfat usb_storage 39646 0 uas 17828 0 dm_crypt 22528 0 rfcomm 38139 0 parport_pc 32114 0 bnep 17830 2 ppdev 12849 0 bluetooth 158438 10 rfcomm,bnep binfmt_misc 17292 1 snd_hda_codec_idt 60251 1 pcmcia 39791 0 joydev 17393 0 snd_hda_intel 32765 3 snd_hda_codec 109562 2 snd_hda_codec_idt,snd_hda_intel snd_hwdep 13276 1 snd_hda_codec snd_pcm 80845 2 snd_hda_intel,snd_hda_codec snd_seq_midi 13132 0 yenta_socket 27428 0 snd_rawmidi 25424 1 snd_seq_midi snd_seq_midi_event 14475 1 snd_seq_midi snd_seq 51567 2 snd_seq_midi,snd_seq_midi_event pcmcia_rsrc 18367 1 yenta_socket wacom_w8001 12906 0 irda 185517 0 arc4 12473 2 iwl3945 73111 0 iwl_legacy 71134 1 iwl3945 mac80211 436455 2 iwl3945,iwl_legacy cfg80211 178679 3 iwl3945,iwl_legacy,mac80211 snd_timer 28931 2 snd_pcm,snd_seq snd_seq_device 14172 3 snd_seq_midi,snd_rawmidi,snd_seq dm_multipath 22710 0 pcmcia_core 21511 3 pcmcia,yenta_socket,pcmcia_rsrc psmouse 96619 0 apanel 12718 0 serport 12808 1 serio_raw 13027 0 crc_ccitt 12595 1 irda mac_hid 13077 0 snd 62064 15 snd_hda_codec_idt,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_t imer,snd_seq_device input_polldev 13648 1 apanel soundcore 14635 1 snd snd_page_alloc 14115 2 snd_hda_intel,snd_pcm lp 17455 0 fujitsu_laptop 18504 0 parport 40930 3 parport_pc,ppdev,lp dm_raid45 76451 0 xor 25987 1 dm_raid45 dm_mirror 21822 0 dm_region_hash 16065 1 dm_mirror dm_log 18193 3 dm_raid45,dm_mirror,dm_region_hash sdhci_pci 18324 0 sdhci 28241 1 sdhci_pci sky2 49545 0 i915 414939 3 drm_kms_helper 45466 1 i915 drm 197692 4 i915,drm_kms_helper i2c_algo_bit 13199 1 i915 video 19068 1 i915

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  • how do i fix this: the networking and wireless are enabled. but list of networks under wireless networks not available

    - by Ayesha Ahmad
    i started working with ubuntu 11.10 last year. i upgraded to 12.04 a week back. since then i have had all sorts of problems with network connection. first had to install the new driver. the hardware switch somehow got disabled then the above problem arrived. even tho the options are all enabled, the OS is not able to detect scan available network connections. also i have to bring to notice that once in a while it does get connected, can not explain how it happens. I want to fix this problem once and for all. please help. ifconfig: eth0 Link encap:Ethernet HWaddr f0:4d:a2:51:b3:c8 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:44 eth1 Link encap:Ethernet HWaddr 1c:65:9d:67:d5:e1 inet6 addr: fe80::1e65:9dff:fe67:d5e1/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:170 TX packets:0 errors:27 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:17 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:344 errors:0 dropped:0 overruns:0 frame:0 TX packets:344 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:20336 (20.3 KB) TX bytes:20336 (20.3 KB) lshw -c network *-network description: Wireless interface product: BCM4313 802.11b/g/n Wireless LAN Controller vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: eth1 version: 01 serial: 1c:65:9d:67:d5:e1 width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=wl0 driverversion=5.100.82.38 latency=0 multicast=yes wireless=IEEE 802.11 resources: irq:17 memory:f0500000-f0503fff *-network description: Ethernet interface product: AR8152 v1.1 Fast Ethernet vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:04:00.0 logical name: eth0 version: c1 serial: f0:4d:a2:51:b3:c8 capacity: 100Mbit/s width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI firmware=N/A latency=0 multicast=yes port=twisted pair resources: irq:44 memory:f0400000-f043ffff ioport:2000(size=128) iwconfig lo no wireless extensions. eth1 IEEE 802.11 Access Point: Not-Associated Link Quality:5 Signal level:0 Noise level:196 Rx invalid nwid:0 invalid crypt:0 invalid misc:0 eth0 no wireless extensions. lspci 00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 18) 00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18) 00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06) 00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06) 00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06) 00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 06) 00:1c.1 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 2 (rev 06) 00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 06) 00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 06) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a6) 00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 06) 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 6 port SATA AHCI Controller (rev 06) 00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 06) 00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 06) 03:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) 04:00.0 Ethernet controller: Atheros Communications Inc. AR8152 v1.1 Fast Ethernet (rev c1) ff:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 05) ff:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 05) ff:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 05) ff:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 05) ff:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 05) ff:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 05) I hope this information is of some help.

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  • Randomely loosing wireless connexion with Cubuntu 12.04

    - by statquant
    I am presently experiencing random disconnections from my wireless network. It looks like it is more and more frequent (however I have not seen any clear pattern). This is killing me... Here is some information that should help (from ubuntu forums). Thanks for reading Machine : Acer Aspire S3 statquant@euclide:~$ lsb_release -d Description: Ubuntu 12.04.1 LTS statquant@euclide:~$ uname -mr 3.2.0-33-generic x86_64 statquant@euclide:~$ sudo /etc/init.d/networking restart * Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces * Reconfiguring network interfaces... statquant@euclide:~$ lspci 02:00.0 Network controller: Atheros Communications Inc. AR9485 Wireless Network Adapter (rev 01) statquant@euclide:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 004: ID 064e:c321 Suyin Corp. Bus 002 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. statquant@euclide:~$ ifconfig wlan0 Link encap:Ethernet HWaddr 74:de:2b:dd:c4:78 inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::76de:2bff:fedd:c478/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:913 errors:0 dropped:0 overruns:0 frame:0 TX packets:802 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:873218 (873.2 KB) TX bytes:125826 (125.8 KB) statquant@euclide:~$ iwconfig wlan0 IEEE 802.11bgn ESSID:"Bbox-D646D1" Mode:Managed Frequency:2.437 GHz Access Point: 00:19:70:80:01:6C Bit Rate=65 Mb/s Tx-Power=16 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:on Link Quality=56/70 Signal level=-54 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:71 Missed beacon:0 statquant@euclide:~$ dmesg | grep "wlan" [ 17.495866] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 17.498950] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 20.072015] wlan0: authenticate with 00:19:70:80:01:6c (try 1) [ 20.269853] wlan0: authenticate with 00:19:70:80:01:6c (try 2) [ 20.272386] wlan0: authenticated [ 20.298682] wlan0: associate with 00:19:70:80:01:6c (try 1) [ 20.302321] wlan0: RX AssocResp from 00:19:70:80:01:6c (capab=0x431 status=0 aid=1) [ 20.302325] wlan0: associated [ 20.307307] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 30.402292] wlan0: no IPv6 routers present statquant@euclide:~$ sudo lshw -C network [sudo] password for statquant: *-network description: Wireless interface product: AR9485 Wireless Network Adapter vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 01 serial: 74:de:2b:dd:c4:78 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless configuration: broadcast=yes driver=ath9k driverversion=3.2.0-33-generic firmware=N/A ip=192.168.1.3 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn resources: irq:17 memory:c0400000-c047ffff memory:afb00000-afb0ffff statquant@euclide:~$ iwlist scan wlan0 Scan completed : Cell 01 - Address: 00:19:70:80:01:6C Channel:6 Frequency:2.437 GHz (Channel 6) Quality=56/70 Signal level=-54 dBm Encryption key:on ESSID:"Bbox-D646D1" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s 9 Mb/s; 12 Mb/s; 18 Mb/s Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=000000125fb152bb Extra: Last beacon: 40020ms ago IE: Unknown: 000B42626F782D443634364431 IE: Unknown: 010882848B960C121824 IE: Unknown: 030106 IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK IE: WPA Version 1 Group Cipher : TKIP Pairwise Ciphers (2) : CCMP TKIP Authentication Suites (1) : PSK IE: Unknown: 2A0100 IE: Unknown: 32043048606C IE: Unknown: DD180050F2020101820003A4000027A4000042435E0062322F00 IE: Unknown: 2D1A4C101BFF00000000000000000000000000000000000000000000 IE: Unknown: 3D1606080800000000000000000000000000000000000000 IE: Unknown: DD0900037F01010000FF7F IE: Unknown: DD0A00037F04010000000000 And... finally, please note that I did the following (after looking for fixes of similar problems), but unfortunately it did not work sudo modprobe -r iwlwifi sudo modprobe iwlwifi 11n_disable=1

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  • Intermittent internet connectivity

    - by Rob Oplawar
    UPDATED: I recently built a new computer and set it up to dual-boot Windows 7 and Ubuntu 11.10. In Windows, using the same hardware, my LAN connectivity is solid. In Ubuntu, however, my network interface periodically dies and resets itself; I'll have a solid connection for 30 seconds, and then it will go out for 30 seconds. When I tail the log: tail -f /var/log/kern.log I see "eth0 link up" messages appear periodically, corresponding with the return of connectivity. I posted the original question months ago, and misinterpreted what was going on. With a working Internet connection in Windows, I ignored the problem for some months. See my answer below for the solution (drivers). ORIGINAL POST In Ubuntu, although I maintain a solid connection to my LAN (pinging the router IP address consistently returns a good result), my internet connectivity drops in and out. When I continuously ping 74.125.227.18 (a google.com server), I get responses for a while, then I start getting "Destination Host Unreachable" for a while, then I get responses again. This happens consistently, dropping the connection for about 30 seconds out of every minute or two. Whether I configure my network via the network manager or via /etc/network/interfaces seems to make no difference. I configure with the following settings: address 192.168.1.101 network 192.168.1.0 gateway 192.168.1.99 (my router's IP address) netmask 255.255.255.0 (confirmed as the right netmask for the router) broadcast 192.168.1.255 (also confirmed with the router). ifconfig confirms that these settings are working: eth0 Link encap:Ethernet HWaddr 50:e5:49:40:da:a6 inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::52e5:49ff:fe40:daa6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:11557 errors:0 dropped:11557 overruns:0 frame:11557 TX packets:13117 errors:0 dropped:211 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:9551488 (9.5 MB) TX bytes:1930952 (1.9 MB) Interrupt:41 Base address:0xa000 I get the same issue when I use automatic DHCP address settings, although I did confirm that there is no other machine on the network with the static IP address I want to use. As I said, the connection to the local network stays solid - I never have any trouble pinging 192.168.1.* - it's internet addresses that I intermittently cannot reach. It's not a DNS issue because pinging known IP addresses directly shows the same behavior. Also, I don't think it's a hardware issue, as I never have any internet connectivity problems on the same machine in Windows. The network hardware is built into the motherboard: Gigabyte Z68XP-UD3P. I managed to bring the OS fully up to date, according to the update manager, but it didn't fix the issue, and with my limited understanding of network architecture I'm at my wit's end. The only clue I can see is that ifconfig is reporting a lot of dropped packets, but I'm not sure what to do about it. UPDATE: It seems my problem is a little more generic than I described; now when I try pinging my router and google simultaneously, they both go unreachable at the same time. Running ifdown eth0 and then ifup eth0 brings it back temporarily; if I just wait it comes back after a couple of minutes. I'll broaden my search through intermittent network connectivity problems.

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  • Problem in udp socket programing in c

    - by Md. Talha
    I complile the following C code of UDP client after I run './udpclient localhost 9191' in terminal.I put "Enter Text= " as Hello, but it is showing error in sendto as below: Enter text: hello hello : error in sendto()guest-1SDRJ2@md-K42F:~/Desktop$ " Note: I open 1st the server port as below in other terminal ./server 9191. I beleive there is no error in server code. The udp client is not passing message to server. If I don't use thread , the message is passing .But I have to do it by thread. UDP client Code: /* simple UDP echo client */ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include <stdio.h> #include <pthread.h> #define STRLEN 1024 static void *readdata(void *); static void *writedata(void *); int sockfd, n, slen; struct sockaddr_in servaddr; char sendline[STRLEN], recvline[STRLEN]; int main(int argc, char *argv[]) { pthread_t readid,writeid; struct sockaddr_in servaddr; struct hostent *h; if(argc != 3) { printf("Usage: %s <proxy server ip> <port>\n", argv[0]); exit(0); } /* create hostent structure from user entered host name*/ if ( (h = gethostbyname(argv[1])) == NULL) { printf("\n%s: error in gethostbyname()", argv[0]); exit(0); } /* create server address structure */ bzero(&servaddr, sizeof(servaddr)); /* initialize it */ servaddr.sin_family = AF_INET; memcpy((char *) &servaddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length); servaddr.sin_port = htons(atoi(argv[2])); /* get the port number from argv[2]*/ /* create a UDP socket: SOCK_DGRAM */ if ( (sockfd = socket(AF_INET,SOCK_DGRAM, 0)) < 0) { printf("\n%s: error in socket()", argv[0]); exit(0); } pthread_create(&readid,NULL,&readdata,NULL); pthread_create(&writeid,NULL,&writedata,NULL); while(1) { }; close(sockfd); } static void * writedata(void *arg) { /* get user input */ printf("\nEnter text: "); do { if (fgets(sendline, STRLEN, stdin) == NULL) { printf("\n%s: error in fgets()"); exit(0); } /* send a text */ if (sendto(sockfd, sendline, sizeof(sendline), 0, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0) { printf("\n%s: error in sendto()"); exit(0); } }while(1); } static void * readdata(void *arg) { /* wait for echo */ slen = sizeof(servaddr); if ( (n = recvfrom(sockfd, recvline, STRLEN, 0, (struct sockaddr *) &servaddr, &slen)) < 0) { printf("\n%s: error in recvfrom()"); exit(0); } /* null terminate the string */ recvline[n] = 0; fputs(recvline, stdout); }

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  • Ubuntu 12.10 no network and no graphics

    - by khasiKoMasu
    I recently upgraded Ubuntu 12.04 to 12.10 only to find out that it won't connect to any network, neither wired nor wireless and the graphics is messed up too as in a low screen resolution. For 12.04, my system was running perfectly. I don't know why upgrade messed it up so bad. Reinstalling the OS is an issue because I have set up a lot of development environments that I cannot afford to set it up again. Some of the outputs: lspci -nn | grep 0200 02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 02) nm-tool NetworkManager Tool State: disconnected cat /etc/network/interfaces auto lo iface lo inet loopback sudo cat /var/log/syslog | grep etwork | tail -n20 Nov 2 13:50:22 Cobalt NetworkManager[978]: SCPlugin-Ifupdown: (-1240454760) ... get_connections (managed=false): return empty list. Nov 2 13:50:22 Cobalt NetworkManager[978]: Ifupdown: get unmanaged devices count: 0 Nov 2 13:50:22 Cobalt bluetoothd[1016]: Failed to init network plugin Nov 2 13:50:22 Cobalt NetworkManager[978]: <info> modem-manager is now available Nov 2 13:50:22 Cobalt NetworkManager[978]: <info> monitoring kernel firmware directory '/lib/firmware'. Nov 2 13:50:22 Cobalt NetworkManager[978]: <info> WiFi enabled by radio killswitch; enabled by state file Nov 2 13:50:22 Cobalt NetworkManager[978]: <info> WWAN enabled by radio killswitch; enabled by state file Nov 2 13:50:22 Cobalt NetworkManager[978]: <info> WiMAX enabled by radio killswitch; enabled by state file Nov 2 13:50:22 Cobalt NetworkManager[978]: <info> Networking is enabled by state file Nov 2 13:50:22 Cobalt NetworkManager[978]: <warn> /sys/devices/virtual/net/lo: couldn't determine device driver; ignoring... Nov 2 13:50:22 Cobalt NetworkManager[978]: <warn> /sys/devices/virtual/net/lo: couldn't determine device driver; ignoring... Nov 2 13:50:22 Cobalt NetworkManager[978]: <warn> bluez error getting default adapter: Message did not receive a reply (timeout by message bus) Nov 2 13:50:22 Cobalt NetworkManager[978]: <warn> bluez error getting default adapter: Message did not receive a reply (timeout by message bus) Nov 2 13:50:22 Cobalt kernel: [ 28.688167] type=1400 audit(1351882222.452:10): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=1046 comm="apparmor_parser" Nov 2 13:50:22 Cobalt bluetoothd[1062]: Failed to init network plugin Nov 2 13:50:22 Cobalt NetworkManager[978]: <warn> bluez error getting default adapter: Message did not receive a reply (timeout by message bus) Nov 2 13:50:22 Cobalt bluetoothd[1118]: Failed to init network plugin Nov 2 13:50:22 Cobalt NetworkManager[978]: <warn> bluez error getting default adapter: Message did not receive a reply (timeout by message bus) Nov 2 13:50:22 Cobalt bluetoothd[1237]: Failed to init network plugin Nov 2 13:50:22 Cobalt NetworkManager[978]: <warn> bluez error getting default adapter: Message did not receive a reply (timeout by message bus) ps aux | grep -i network root 978 0.0 0.1 23732 4808 ? Ssl 13:50 0:00 NetworkManager sudo modprobe -r forcedeth FATAL: Module forcedeth not found

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  • How to start networking on a wired interface before logon in Ubuntu Desktop Edition

    - by Burly
    Problem Ubuntu 9.10 Desktop Edition (and possibly previous versions as well, I haven't tested them) has no network connections after boot until at least 1 user logs in. This means any services that require networking (e.g. openssh-server) are not available until someone logs in locally either via gdm, kdm, or a TTY. Background Ubuntu 9.10 Desktop Edition uses the NetworkManager service to take commands from the nm-applet in Gnome (or it's equivalent in KDE). As I understand it, while NetworkManager is running at boot, it is not issued any commands to connect until you login for the first time because nm-applet isn't running until you login and your Gnome session starts (or similar for KDE). I'm not sure what prompts NetworkManager to connect to the network when you login via a TTY. There are several relevant variables involved in starting up the network connections including: Wired vs Wireless (and the resulting drivers, SSID, passwords, and priorities) Static vs DHCP Multiple interfaces Constraints Support Ubuntu 9.10 Karmic Koala (bonus points for additional supported versions) Support wired eth0 interface Receive an IP address via DHCP Receive DNS information via DHCP (obviously the DHCP server must provide this information) Enable networking at the proper time (e.g. some time after file systems are loaded but before network services like ssh start) Switching distros or versions (e.g. to Server Edition) is not an acceptable solution Switching to a Static IP configuration is not an acceptable solution Question How to start networking on a wired interface before logon in Ubuntu Desktop Edition? What I have tried Per this guide, adding the following entry into /etc/network/interfaces so that NetworkManager won't manage the eth0 interface: auth eth0 iface inet dhcp After reboot eth0 is down. Issuing ifconfig eth0 up brings the interface up but it receives no IP address. Issuing dhclient eth0 instead Does bring up the interface and it Does receive an IP address. Completely removing the NetworkManager package in addition to the settings above. I'm a bit confused with the whole UpStart/SysVinit mangling that's going in Ubuntu currently (I'm more familiar with the CentOS world). However, directly issuing sudo /etc/init.d/networking start Or sudo start networking does not bring up the eth0 interface at all, much less get an IP address. See-Also How to force NetworkManager to make a connection before login? References Ubuntu Desktop Edition Ubuntu Networking Configuration Using Command Line Automatic Network Configuration Via Command-Line Start network connection before login

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  • Problems sending and receiving data between php and perl?

    - by Chip Gà Con
    I have a problem in sending and receiving data between php and perl socket: -Problem: +php can not send all byte data to perl socket +Perl socket can not receiving all data from php . Here code php: function save(){ unset($_SESSION['info']); unset($_SESSION['data']); global $config,$ip; $start=$_POST['config']; $fp = fsockopen($_SESSION['ip'], $config['port'], $errno, $errstr, 30); if(!$fp) { $_SESSION['info']="Not connect "; transfer("Not connect".$ip, "index.php?com=server&act=info"); } else { $_SESSION['info']="Save config - ".$ip; fwrite($fp,$start); transfer("Sending data to ".$ip, "index.php?com=server&act=info"); } } Here code perl socket: #!/usr/bin/perl use strict; use warnings; use Carp; use POSIX qw( setsid ); use IO::Socket; $| = 1; my $socket = new IO::Socket::INET ( LocalHost => '192.168.150.3', LocalPort => '5000', Proto => 'tcp', Listen => 5, Reuse => 1 ); die "Coudn't open socket" unless $socket; print "\nTCPServer Waiting for client on port 5000"; my $client_socket = ""; while ($client_socket = $socket->accept()) { my $recieved_data =" "; my $send_data=" "; my $peer_address = $client_socket->peerhost(); my $peer_port = $client_socket->peerport(); print "\n I got a connection from ( $peer_address , $peer_port ) "; print "\n SEND( TYPE q or Q to Quit):"; $client_socket->recv($recieved_data,20000); #while (defined($recieved_data = <$client_socket>)) { if ( $recieved_data eq 'q' or $recieved_data eq 'Q' ) { close $client_socket; last; } elsif ($recieved_data eq 'start' or $recieved_data eq 'START' ) { $send_data = `/etc/init.d/squid start`; } elsif ($recieved_data eq 'restart' or $recieved_data eq 'RESTART' ) { $send_data = `/etc/init.d/squid restart`; } elsif ($recieved_data eq 'stop' or $recieved_data eq 'STOP' ) { $send_data = `/etc/init.d/squid stop`; } elsif ($recieved_data eq 'hostname' or $recieved_data eq 'HOSTNAME' ) { $send_data= `hostname`; } elsif ($recieved_data eq 'view-config' or $recieved_data eq 'VIEW-CONFIG' ) { $send_data = `cat /etc/squid/squid.conf` ; } else { # print $recieved_data; open OUTPUT_FILE, '> /root/data' or die("can not open file"); print OUTPUT_FILE $recieved_data; close OUTPUT_FILE } #} if ($send_data eq 'q' or $send_data eq 'Q') { $client_socket->send ($send_data); close $client_socket; last; } else { $client_socket->send($send_data); } }

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  • Can't detect wireless networks, running ubuntu 9.10 on eeepc 1000he

    - by David Brown
    Hi, I am running Ubuntu 9.10 on an ASUS eeepc 1000HE, and my wireless card, RaLink RT 2860, is failing to recognize any wireless networks. It was working fine this morning, until I accidentally hit Fn F2, disabling the wireless card. I hit Fn F2 again to reenable it, but it no longer will detect any wireless networks (and other computers in the household do recognize them). Any help at all will be greatly appreciated! I googled quite a bit and talked to a human about this but could not fix it. We tried dhclient ra0, which returned There is already a pid file /var/run/dhclient.pid with pid 2438 killed old client process, removed PID file Internet Systems Consortium DHCP Client V3.1.2 Copyright 2004-2008 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/sw/dhcp/ Listening on LPF/ra0/00:25:d3:13:f4:20 Sending on LPF/ra0/00:25:d3:13:f4:20 Sending on Socket/fallback DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 6 DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 9 DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 12 DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 8 DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 10 DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 10 DHCPDISCOVER on ra0 to 255.255.255.255 port 67 interval 6 No DHCPOFFERS received. No working leases in persistent database - sleeping. Other data: iwconfig returns (other stuff here...) ra0 RT2860 Wireless ESSID:"" Nickname:"RT2860STA" Mode:Auto Frequency=2.412 GHz Bit Rate=1 Mb/s RTS thr:off Fragment thr:off Link Quality=10/100 Signal level:0 dBm Noise level:-87 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 ifconfig returns (other stuff here...) ra0 Link encap:Ethernet HWaddr 00:25:d3:13:f4:20 inet6 addr: fe80::225:d3ff:fe13:f420/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:583 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:19 ra0:avahi Link encap:Ethernet HWaddr 00:25:d3:13:f4:20 inet addr:169.254.7.117 Bcast:169.254.255.255 Mask:255.255.0.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 Interrupt:19

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  • Gateway on a virtual network interface used by LXC guests

    - by linkdd
    I'm currently having some problems with configuring a gateway for a virtual network interface. Here is what I've done : I created a virtual network interface : # brctl addbr lxc0 # brctl setfd lxc0 0 # ifconfig lxc0 192.168.0.1 promisc up # route add -net default gw 192.168.0.1 lxc0 The output of ifconfig gave me what I wanted : lxc0 Link encap:Ethernet HWaddr 22:4f:e4:40:89:bb inet adr:192.168.0.1 Bcast:192.168.0.255 Masque:255.255.255.0 adr inet6: fe80::88cf:d4ff:fe47:3b6b/64 Scope:Lien UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:623 errors:0 dropped:0 overruns:0 frame:0 TX packets:7412 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:0 RX bytes:50329 (49.1 KiB) TX bytes:335738 (327.8 KiB) I configured dnsmasq to provide a DNS server (using the default : 192.168.1.1) and a DHCP server. Then, my LXC guest is configured like this : lxc.network.type=veth lxc.network.link=lxc0 lxc.network.flags=up Every thing is working perfectly, my containers have an IP (192.168.0.57 and 192.168.0.98). I can ping the host and the containers from the containers and from the host : (host)# ping -c 3 192.168.0.114 PING 192.168.0.114 (192.168.0.114) 56(84) bytes of data. 64 bytes from 192.168.0.114: icmp_req=1 ttl=64 time=0.044 ms 64 bytes from 192.168.0.114: icmp_req=2 ttl=64 time=0.038 ms 64 bytes from 192.168.0.114: icmp_req=3 ttl=64 time=0.043 ms --- 192.168.0.114 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1998ms rtt min/avg/max/mdev = 0.038/0.041/0.044/0.007 ms (guest)# ping -c 3 192.168.0.1 PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. 64 bytes from 192.168.0.1: icmp_req=1 ttl=64 time=0.048 ms 64 bytes from 192.168.0.1: icmp_req=2 ttl=64 time=0.042 ms 64 bytes from 192.168.0.1: icmp_req=3 ttl=64 time=0.042 ms --- 192.168.0.1 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1999ms rtt min/avg/max/mdev = 0.042/0.044/0.048/0.003 ms Now, it's time to configure the host as a gateway for the network 192.168.0.0/24 : #!/bin/sh # Clear rules iptables -F iptables -t nat -F iptables -t mangle -F iptables -X iptables -A FORWARD -i lxc0 -o eth0 -j ACCEPT iptables -A FORWARD -i eth0 -o lxc0 -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE echo 1 > /proc/sys/net/ipv4/ip_forward The final test failed completely, ping the outside : (guest)# ping -c 3 google.fr PING google.fr (173.194.67.94) 56(84) bytes of data. From 192.168.0.1: icmp_seq=3 Redirect Host(New nexthop: wi-in-f94.1e100.net (173.194.67.94)) From 192.168.0.1 icmp_seq=1 Destination Host Unreachable From 192.168.0.1 icmp_seq=2 Destination Host Unreachable From 192.168.0.1 icmp_seq=3 Destination Host Unreachable --- google.fr ping statistics --- 3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2017ms Did I missed something ?

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  • How to block subreddits with BIND9?

    - by user1391189
    Please help me block NSFW subreddits like this one (http://www.reddit.com/r/NSFW/) I would like to keep access to SFW subreddits, but block certain subreddits that are distracting or NSFW. I know how to filter domains. (see files below) But how do I apply the filter only to certain subreddits? So far I have set up the following files: blocklist.conf zone "adimages.go.com" { type master; file "dummy-block"; }; zone "admonitor.net" { type master; file "dummy-block"; }; zone "ads.specificpop.com" { type master; file "dummy-block"; }; ... named.conf options { allow-query { 127.0.0.1; }; allow-recursion { 127.0.0.1; }; directory "c:\bind\etc"; notify no; }; zone "." IN { type hint; file "c:\bind\etc\named.root"; }; zone "localhost" IN { allow-update { none; }; file "c:\bind\etc\localhost.zone"; type master; }; zone "0.0.127.in-addr.arpa" IN { allow-update { none; }; file "c:\bind\etc\named.local"; type master; }; key "rndc-key" { algorithm hmac-md5; secret "O5VdbBKKEMzuLYjM60CxwuLLURFA6peDYHCBvZCqjoa6KtL1ggD7OTLeLtnu2jR5I5cwA/MQ8UdHc+9tMJRSiw=="; }; controls { inet 127.0.0.1 port 953 allow { 127.0.0.1; } keys { "rndc-key"; }; }; //Blocklist include "c:\bind\etc\blocklist.conf"; dummy-block $TTL 604800 @ IN SOA localhost. root.localhost. ( 2 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS localhost. @ IN A 127.0.0.1 * IN A 127.0.0.1

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  • VMWare ESXi virtual machine can contact the gateway but not the DNS server

    - by Nathan Palmer
    I am having a bit of a strange issue. I have a VMWare ESXi server with two virtual machines running on it. They are running just fine and can communicate on the network without a problem. I am now trying to add a third. I am installing Ubuntu 8.04 Server. I assign it a static IP address and it's a fresh installation. Once installed I can ping the gateway but I cannot ping the DNS server. It's on the same network with the other two VMs which are communicating just fine. I have tried to reinstall the operating system but it still fails to connect. Here is /etc/network/interfaces auto eth0 iface eth0 inet static address 192.168.1.23 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 gateway 192.168.1.1 dns-nameservers 208.67.222.222 #opendns dns-search mydomain.com Here is route Destination | Gateway | Genmask | Flags | Metric | Ref | Use | Iface localnet | * | 255.255.255.0 | U | 0 | 0 | 0 | eth0 default | 192.168.1.1 | 0.0.0.0 | UG | 100 | 0 | 0 | eth0 Since I'm running this behind a FortiGate this is what the sniff command gives me when I try to ping 208.67.222.222 arp who-has 192.168.1.1 tell 192.168.1.23 arp reply 192.168.1.1 is-at MAC 192.168.1.23 -> 208.67.222.222: icmp: echo request 192.168.1.23 -> 208.67.222.222: icmp: echo request 192.168.1.23 -> 208.67.222.222: icmp: echo request 192.168.1.23 -> 208.67.222.222: icmp: echo request 192.168.1.23 -> 208.67.222.222: icmp: echo request As you can see it looks like I never get a response. One interesting thing I notice is the arp reply's MAC doesn't look right. I have cleared the FortiGate's ARP cache though and checked the entry and it seems correct. The MAC it lists is the one for the router. However if I ping from a different virtual machine that is also Ubuntu 8.04 with a nearly identical configuration I get this. 192.168.1.22 -> 208.67.222.222: icmp: echo request 208.67.222.222 -> 192.168.1.22: icmp: echo reply 192.168.1.22 -> 208.67.222.222: icmp: echo request 208.67.222.222 -> 192.168.1.22: icmp: echo reply 192.168.1.22 -> 208.67.222.222: icmp: echo request 208.67.222.222 -> 192.168.1.22: icmp: echo reply So, what could I be missing? Thanks.

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  • How to connect to a Virtualbox guest from the host when network cable unplugged

    - by Greg K
    I'd like to work offline (I'm flying to the US twice this month), to do this I need access to a linux development server. When I work from home I boot a VirtualBox VM and that acts as my dev server for the day (providing Apache, PHP & MySQL to run my server side code). However, I'd like to work with my VM when I'm not connected to a network. I have my Ubuntu VM guest set up with a bridge connection so it can serve HTTP and provide SSH access from inside my local network. I've tried to manually configure my network settings on both Mac OSX (the host) and Ubuntu (the guest) but I can't even ping my own NIC address (127.0.0.1 can, 192.168.21.x I can't) in OS X when I unplug the cable. Manual network settings: $ ifconfig en0 en0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether 00:xx:xx:xx:xx:xx inet 192.168.21.5 netmask 0xffffff00 broadcast 192.168.21.255 media: autoselect (100baseTX <full-duplex,flow-control>) status: active I can ping localhost fine, as well as my VM (.20) and SSH too. $ ping 192.168.21.5 PING 192.168.21.5 (192.168.21.5): 56 data bytes 64 bytes from 192.168.21.5: icmp_seq=0 ttl=64 time=0.085 ms 64 bytes from 192.168.21.5: icmp_seq=1 ttl=64 time=0.102 ms 64 bytes from 192.168.21.5: icmp_seq=2 ttl=64 time=0.100 ms 64 bytes from 192.168.21.5: icmp_seq=3 ttl=64 time=0.094 ms $ ping 192.168.21.20 PING 192.168.21.20 (192.168.21.20): 56 data bytes 64 bytes from 192.168.21.20: icmp_seq=0 ttl=64 time=0.910 ms 64 bytes from 192.168.21.20: icmp_seq=1 ttl=64 time=1.181 ms 64 bytes from 192.168.21.20: icmp_seq=2 ttl=64 time=1.159 ms 64 bytes from 192.168.21.20: icmp_seq=3 ttl=64 time=1.320 ms Network cable unplugged: $ ifconfig en0 en0: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 ether 00:xx:xx:xx:xx:xx media: autoselect status: inactive $ ping 192.168.21.5 PING 192.168.21.5 (192.168.21.5): 56 data bytes ping: sendto: No route to host ping: sendto: No route to host Request timeout for icmp_seq 0 ping: sendto: No route to host Request timeout for icmp_seq 1 Does OS X disable the NIC when the network cable is unplugged? Any way to stop it doing this?

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  • Cloudify: bootstrap-localcloud: operation failed?

    - by quanta
    OS: Gentoo, CentOS Version: 2.1.0 Follow the quick start guide, I got the below error when running bootstrap-localcloud: cloudify@default> bootstrap-localcloud STARTING CLOUDIFY MANAGEMENT 2012-05-30 14:55:50,396 WARNING [org.cloudifysource.shell.commands.AbstractGSCommand] - ; \ Caused by: org.cloudifysource.shell.commands.CLIException: \ Error while starting agent. \ Please make sure that another agent is not already running. Operation failed. What port Cloudify is using to check that agent is running? PS: it's working fine when running on Windows. UPDATE: Wed May 30 22:37:30 ICT 2012 Reply to @tamirkorem and @Itai Frenkel: I'm pretty sure because this is the first time I run that command on 2 servers. More clearly, here're the output: cloudify@default> teardown-localcloud Teardown will uninstall all of the deployed services. Do you want to continue [y/n]? 2012-05-30 22:43:33,145 WARNING [org.cloudifysource.shell.commands.AbstractGSCommand] - Teardown failed. Failed to fetch the currently deployed applications list. For force teardown use the -force flag. Operation failed. cloudify@default> teardown-localcloud -force Teardown will uninstall all of the deployed services. Do you want to continue [y/n]? Failed to fetch the currently deployed applications list. Continuing teardown-localcloud. .2012-05-30 22:46:39,040 WARNING [org.cloudifysource.shell.commands.AbstractGSCommand] - Teardown aborted, an agent was not found on the local machine. Operation failed. and this one is the detailed result: cloudify@default> bootstrap-localcloud --verbose NIC Address=127.0.0.1 Lookup Locators=127.0.0.1:4172 Lookup Groups=localcloud Starting agent and management processes: gs-agent.sh gsa.global.lus 0 gsa.lus 0 gsa.gsc 0 gsa.global.gsm 0 gsa.gsm_lus 1 gsa.global.esm 0 gsa.esm 1 >/dev/null 2>&1 STARTING CLOUDIFY MANAGEMENT 2012-05-30 22:36:12,870 WARNING [org.cloudifysource.shell.commands.AbstractGSCommand] - ; Caused by: org.cloudifysource.shell.commands.CLIException: Error while starting agent. Please make sure that another agent is not already running. Command executed: /usr/local/src/gigaspaces-cloudify-2.1.0-ga/bin/gs-agent.sh gsa.global.lus 0 gsa.lus 0 gsa.gsc 0 gsa.global.gsm 0 gsa.gsm_lus 1 gsa.global.esm 0 gsa.esm 1 >/dev/null 2>&1 Reply to @Eliran Malka: there is no such process listening on port 4172: # netstat --protocol=inet -nlp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:9050 0.0.0.0:* LISTEN 2363/tor tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 2331/mysqld tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 2293/cupsd

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  • How to configure a tun interface on Linux for SSH port forwarding?

    - by sarshad
    I am trying to forward port 139 from a Windows machine to my Ubuntu SSH server on a tun interface with the ip address 10.0.0.1. This is so that I can access the windows shares on the machine on my Ubuntu server, through the reverse tunnel. I can forward ports to 127.0.0.1, but not to 10.0.0.1. On windows I am using the Tunnelier ssh client. On my Ubuntu server, the following message is printed in auth.log: Received disconnect from 124.109.51.154: 11: Server denied request for client-side server-2-client forwarding on 10.0.0.1:139. So far i have tried the following settings: GatewayPorts yes PermitTunnel yes AllowTcpForwarding yes in the /etc/ssh/sshd_config file, but it did not work. I set up the tun like this: sudo tunctl -t loc_0 -u myusername sudo ifconfig loc_0 inet 10.0.0.1 netmask 255.255.255.0 up The settings in the Tunneler ssh client should not matter because I can forward port 139 successfully to the Microsoft Loopback Adapter on a Windows machine running the WinSSHD server. Versions: Windows is XP SP3, Ubuntu is 10.10. Update: I tried to forward the port to a number greater than 1024 mentioning the IP address of the tun, and it successfully connected but the forwarding was done on 127.0.0.1 instead of the tun's IP address 10.0.0.1. So there are two separate problems now, when connecting from the Windows machine: 1) Forwarding on ports less than 1024 is probably being denied. How can we allow that on the server? 2) Forwarding is done only on 127.0.0.1 even if I mention 10.0.0.1 which is the tun's IP address. Another attempt: I also tried to forward port 22 of a Linux machine to the tun's port 55567. It showed success. But when I tried to ssh into that port using both local addresses, on the Linux machine in its debug display I got the error Connection failed: no route to host when using 127.0.0.1 to connect and simply Connection refused when using the tun's IP address. So the tun is not getting the forwarded port no matter we connect from a Windows client or a Linux client.

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  • RFC 1918 address on open internet?

    - by longneck
    In trying to diagnose a failover problem with my Cisco ASA 5520 firewalls, I ran a traceroute to www.btfl.com and, much to my surprise, some of the hops came back as RFC 1918 addresses. Just to be clear, this host is not behind my firewall and there is no VPN involved. I have to connect across the open internet to get there. How/why is this possible? asa# traceroute www.btfl.com Tracing the route to 157.56.176.94 1 <redacted> 2 <redacted> 3 <redacted> 4 <redacted> 5 nap-edge-04.inet.qwest.net (67.14.29.170) 0 msec 10 msec 10 msec 6 65.122.166.30 0 msec 0 msec 10 msec 7 207.46.34.23 10 msec 0 msec 10 msec 8 * * * 9 207.46.37.235 30 msec 30 msec 50 msec 10 10.22.112.221 30 msec 10.22.112.219 30 msec 10.22.112.223 30 msec 11 10.175.9.193 30 msec 30 msec 10.175.9.67 30 msec 12 100.94.68.79 40 msec 100.94.70.79 30 msec 100.94.71.73 30 msec 13 100.94.80.39 30 msec 100.94.80.205 40 msec 100.94.80.137 40 msec 14 10.215.80.2 30 msec 10.215.68.16 30 msec 10.175.244.2 30 msec 15 * * * 16 * * * 17 * * * and it does the same thing from my FiOS connection at home: C:\>tracert www.btfl.com Tracing route to www.btfl.com [157.56.176.94] over a maximum of 30 hops: 1 1 ms <1 ms <1 ms myrouter.home [192.168.1.1] 2 8 ms 7 ms 8 ms <redacted> 3 10 ms 13 ms 11 ms <redacted> 4 12 ms 10 ms 10 ms ae2-0.TPA01-BB-RTR2.verizon-gni.net [130.81.199.82] 5 16 ms 16 ms 15 ms 0.ae4.XL2.MIA19.ALTER.NET [152.63.8.117] 6 14 ms 16 ms 16 ms 0.xe-11-0-0.GW1.MIA19.ALTER.NET [152.63.85.94] 7 19 ms 16 ms 16 ms microsoft-gw.customer.alter.net [63.65.188.170] 8 27 ms 33 ms * ge-5-3-0-0.ash-64cb-1a.ntwk.msn.net [207.46.46.177] 9 * * * Request timed out. 10 44 ms 43 ms 43 ms 207.46.37.235 11 42 ms 41 ms 40 ms 10.22.112.225 12 42 ms 43 ms 43 ms 10.175.9.1 13 42 ms 41 ms 42 ms 100.94.68.79 14 40 ms 40 ms 41 ms 100.94.80.193 15 * * * Request timed out.

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  • udp expected behaviour not responding to test result

    - by ernst
    I have a local network topology that is structured as follows: three hosts and a switch in the middle. I am using a switch that supports 10,100,1000 Mbit/s full/half duplex connection. I have configured the hosts with a static ip 172.16.0.1-2-3/25. This is the output of ifconfig eth0 Link encap: Ethernet HWaddr ***** inet addr:172.16.0.3 Bcast:172.16.0.127 Mask:255.255.255.128 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:16 The output on H1 and H2 is perfectly matchable They are mutually reachable since i have tested the network with ping. I have forced the ethernet interface to work at 10M with ethtool -s eth0 speed 10 duplex full autoneg on this is the output of ethtool eth0 supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full S upported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10baseT/Full Advertised pause frame use: Symmetric A dvertised auto-negotiation: Yes Speed: 10Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: on MDI-X: Unknown Supports Wake-on: g Wake-on: d Current message level: 0x000000ff (255) drv probe link timer ifdown ifup rx_err tx_err Link detected: yes – I am doing an experimental test using nttcp to calculate the GOODPUT in the case that H1 and H2 at the same time send data to H3. Since the three links have the same forced capability and the amount of arrving data speed is 10 from H1+10 from H2--20M to H3 it would be expected a bottleneck effect and, due to the non reliable nature of udp, a packet loss. But this doesn't appen since the output of nttcp application shows the same number of byte sended and received. this is the output of nttcp on h3 nttcp -T -r -u 172.16.0.2 & nttcp -T -r -u 172.16.0.1 [1] 4071 Bytes Real s CPU s Real-MBit/s CPU-MBit/s Calls Real-C/s CPU-C/s l 8388608 13.74 0.05 4.8848 1398.0140 2049 149.14 42684.8 Bytes Real s CPU s Real-MBit/s CPU-MBit/s Calls Real-C/s CPU-C/s l 8388608 14.02 0.05 4.7872 1398.0140 2049 146.17 42684.8 1 8388608 13.56 0.06 4.9500 1118.4065 2051 151.28 34181.1 1 8388608 13.89 0.06 4.8310 1198.3084 2051 147.65 36623.0 – How is this possible? Am i missing something? Any help will be gratefully apprecciated, Best regards

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