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• Applications getting killed automatically

  - by nebi

  I am running httperf client on my m/c and after few seconds it is getting killed. dmesg shows: The command is: httperf --hog --client=0/1 --server=39.0.0.2 --port=80 --uri=/50kb --rate=20000 --send-buffer=4096 --recv-buffer=16384 --num-conns=6000000 --num-calls=1 Although I had done this test no. of times but never faced this error any time. From last two days I am observing this. My Ubuntu version is ubuntu 10.04. and httperf version is httperf-0.9.0 [ 2997.180620] Out of memory: kill process 7977 (apache2) score 70532 or a child [ 2997.180632] Killed process 7977 (apache2) [ 2997.184837] Out of memory: kill process 7971 (rsyslogd) score 8702 or a child [ 2997.184844] Killed process 7971 (rsyslogd) [ 2997.188823] Out of memory: kill process 7978 (apache2) score 1354 or a child [ 2997.188829] Killed process 7978 (apache2) [ 2997.192817] Out of memory: kill process 7973 (atd) score 561 or a child [ 2997.192822] Killed process 7973 (atd) [ 2997.196805] Out of memory: kill process 8102 (httperf) score 471 or a child [ 2997.196811] Killed process 8102 (httperf) Output of free command: total used free shared buffers cached Mem: 3862768 163000 3699768 0 2384 13068 -/+ buffers/cache: 147548 3715220 Swap: 3905528 0 3905528

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• Cisco Moves to Unify Telepresence

  Launches protocol to promote interoperability among disparate videoconferencing systems.

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• Random greyed unresponsive screen on netbook

  - by user643722

  I love my Asus Eee PC 1000 Ubuntu 12.04 netbook, but I have a little problem. As I use it, the screen will randomly turn grey and become unresponsive. I can then only wait, until perhaps 10-60 secs. later, when I can interact again. Only the bar at the top of my screen retains its colour throughout. I thought it might be Firefox, as I have a lot of tabs open. I installed Chromium, used it instead, and the problem remained. A while back I upgraded from 1 to 2 Gb RAM. So, I thought recently, maybe I should increase the swap-space. I have 738Mb of 7.2Gb free on root; and 2Gb of 28Gb free on my home drive. I bought a 32 Gb SD Card and assigned 4Gb to swap space. cat /proc/swaps reports that the partition is being used. Alas the problem remains. Does anyone know what's wrong with my machine? The SD Card has changed my machine somewhat, but the greying still happens. I ran free -m shortly after another episode, and received: total used free shared buffers cached Mem: 2004 1731 272 0 370 769 -/+ buffers/cache: 591 1412 Swap: 4073 0 4073 Update: Using 'top', I can see that compiz uses about 43% of the CPU (#1 position) when the greying occurs. After the greying, compiz drops back down to its usual 8% of CPU.

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• Pidgin (Formerly Gaim)

  An open source, multi-protocol IM client that supports AIM, ICQ, MSN Messenger, Yahoo!, IRC, Jabber, and more

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• Understanding RAM usage on Linux

  - by stebbo

  I'm completely new to Linux and I'm just trying to understand where all my RAM is going. I've got a pretty fresh install of Xubuntu running as a VMWare guest, and I've given it 1.5GB RAM to play with. After only running two apps starting up Tomcat servers and also running Firefox, I've got hardly anything left. 160MB according to free -m. Looking at the output from Top, I see Java appearing twice, each stealing about 1/2 Gig resident memory. Both Tomcat instances use the same jdk, I would have thought I'd only see Java there once. What's the story? I had a screenshot but unfortunately couldn't post it being under 10 rep. Update The free -m output requested: total used free shared buffers cached Mem: 1419 1380 39 0 8 111 -/+ buffers/cache: 1259 160 Swap: 509 68 441 Top (coming)

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• mongodb eating 48G in 1min

  - by ledy

  In mongodb i work with this collection: Size 55.93g Data Size 39.82g Storage Size 41.08g Extents 53 Indexes 4 Index Size 9.64g It takes few seconds of mongdb being up with this single collection and all 48GB RAM on the dedicated server are gone. That's worse because there is also a mysqld+nginx/fcgi on this machine which should be allowed to use at least 24GB together. I.e. remaining 24GB, enough for the mongod! However, it does not share in a fair way. Everybody says that the memory for mongod is managed by OS and releases unneccessary space for other processes if they demand RAM. On my machine it is not releasing RAM. What's wrong? free total used free shared buffers cached` Mem: 49559136 49403908 155228 0 57284 47247564 -/+ buffers/cache: 2099060 47460076 Swap: 8008392 164 8008228

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• Need a little help with sound in a JApplet

  - by jacob schuschel

  I am working on a solitaire game in Java, and i need to implement sound when the desk is shuffled, card flipped, etc. I used the following sites as reference to try and get it to work, but i am getting Null Pointer Exceptions or mishandled URL exception (depending on what i tweak). here Also, i am using netbeans 6.7.1 as my IDE. I will try to break down the code and explain: package cardgame; import java.applet.*; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JApplet; import javax.swing.*; import java.io.*; import java.net.*; /** * * @author jacob */ public class Sound extends JApplet { private AudioClip song; // Sound player private String URL = null; private URL songPath; // Sound path /* *sound_1 = shuffling cards *sound_2 = to discard *sound_3 = from discard *sound_4 = cardflip 1 *sound_5 = cardflip 2 */ Sound(String filename) { try { songPath = new URL(getCodeBase(),filename); // Get the Sound URL } catch (MalformedURLException ex) { Logger.getLogger(Sound.class.getName()).log(Level.SEVERE, null, ex); } song = getAudioClip(songPath); // Load the Sound } Sound(int i) { URL = "./sounds/sound_" + i + ".wav"; System.out.println(URL); try { songPath = new URL(URL); // Get the Sound URL song = getAudioClip(songPath); } catch (MalformedURLException ex) { Logger.getLogger(Sound.class.getName()).log(Level.SEVERE, null, ex); } } public void playSound() { song.loop(); // Play } public void stopSound() { song.stop(); // Stop } public void playSoundOnce() { song.play(); // Play only once } } The 2 different construcors are for different ways i tried to implement this. The first one creates the filepath, and passes it in. The second one builds the filepath in the constructor, given a sound # (i made a list of what numbers correspond to what sound for reference). I am getting the followig errors out: ./sounds/sound_1.wav Nov 16, 2009 4:14:13 PM cardgame.Sound ./sounds/sound_2.wav SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_1.wav ./sounds/sound_3.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) ./sounds/sound_4.wav ./sounds/sound_5.wav at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Nov 16, 2009 4:14:13 PM cardgame.Sound SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_2.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Nov 16, 2009 4:14:13 PM cardgame.Sound SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_3.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Nov 16, 2009 4:14:13 PM cardgame.Sound SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_4.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Nov 16, 2009 4:14:13 PM cardgame.Sound SEVERE: null java.net.MalformedURLException: no protocol: ./sounds/sound_5.wav at java.net.URL.(URL.java:583) at java.net.URL.(URL.java:480) at java.net.URL.(URL.java:429) at cardgame.Sound.(Sound.java:46) at cardgame.Game.loadSounds(Game.java:712) at cardgame.Game.(Game.java:62) at cardgame.Main.main(Main.java:25) Thanks for those who read and more thanks to those who help. I know it is somewhat long, but i would rather get it all out there, than have 50 questions that come back or have people not answer due to lack of initial info. also only lets me post a single link right now, so the links are given below dreamincode.net/forums/showtopic14083.htm stackoverflow.com/questions/512436/java-playing-wav-sounds deitel.com/articles/java_tutorials/20060422/LoadingPlayingAudioClips/index.html

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• How to generate a Program template by generating an abstract class

  - by Byron-Lim Timothy Steffan

  i have the following problem. The 1st step is to implement a program, which follows a specific protocol on startup. Therefore, functions as onInit, onConfigRequest, etc. will be necessary. (These are triggered e.g. by incoming message on a TCP Port) My goal is to generate a class for example abstract one, which has abstract functions as onInit(), etc. A programmer should just inherit from this base class and should merely override these abstract functions of the base class. The rest as of the protocol e.g. should be simply handled in the background (using the code of the base class) and should not need to appear in the programmers code. What is the correct design strategy for such tasks? and how do I deal with, that the static main method is not inheritable? What are the key-tags for this problem? (I have problem searching for a solution since I lack clear statements on this problem) Goal is to create some sort of library/class, which - included in ones code - results in executables following the protocol. EDIT (new explanation): Okay let me try to explain more detailled: In this case programs should be clients within a client server architecture. We have a client server connection via TCP/IP. Each program needs to follow a specific protocol upon program start: As soon as my program starts and gets connected to the server it will receive an Init Message (TcpClient), when this happens it should trigger the function onInit(). (Should this be implemented by an event system?) After onInit() a acknowledgement message should be sent to the server. Afterwards there are some other steps as e.g. a config message from the server which triggers an onConfig and so on. Let's concentrate on the onInit function. The idea is, that onInit (and onConfig and so on) should be the only functions the programmer should edit while the overall protocol messaging is hidden for him. Therefore, I thought using an abstract class with the abstract methods onInit(), onConfig() in it should be the right thing. The static Main class I would like to hide, since within it e.g. there will be some part which connects to the tcp port, which reacts on the Init Message and which will call the onInit function. 2 problems here: 1. the static main class cant be inherited, isn it? 2. I cannot call abstract functions from the main class in the abstract master class. Let me give an Pseudo-example for my ideas: public abstract class MasterClass { static void Main(string[] args){ 1. open TCP connection 2. waiting for Init Message from server 3. onInit(); 4. Send Acknowledgement, that Init Routine has ended successfully 5. waiting for Config message from server 6..... } public abstract void onInit(); public abstract void onConfig(); } I hope you get the idea now! The programmer should afterwards inherit from this masterclass and merely need to edit the functions onInit and so on. Is this way possible? How? What else do you recommend for solving this? EDIT: The strategy ideo provided below is a good one! Check out my comment on that.

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• ssh_exchange_identification: Connection closed by remote host

  - by Charlie Epps

  First: $ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa $ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys Connecting to SSH servers gives this message: $ ssh -vvv localhost OpenSSH_5.3p1, OpenSSL 0.9.8m 25 Feb 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to localhost [127.0.0.1] port 22. debug1: Connection established. debug1: identity file /home/charlie/.ssh/identity type -1 debug1: identity file /home/charlie/.ssh/id_rsa type -1 debug3: Not a RSA1 key file /home/charlie/.ssh/id_dsa. debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /home/charlie/.ssh/id_dsa type 2 ssh_exchange_identification: Connection closed by remote host My /etc/hosts.allow is as following: sshd: ALLOW /etc/hosts.deny is as following: ALL: ALL: DENY I have changed my /etc/ssh/sshd_conf as following: ListenAddress 0.0.0.0 Protocol 2 # HostKey for protocol version 1 #HostKey /etc/ssh/ssh_host_key # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile .ssh/authorized_keys PasswordAuthentication no

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• Error 720 on VPN (PPTP) attempt

  - by Andy Shulman

  When I attempt to connect to a server running XP x64 (so essentially Server 2003) using a PPTP connection, it fails with client-side error Registering your computer on the network... Error 720: A connection to the remote computer could not be established. You might need to change the network settings for this configuration. and server-side error Event ID: 20050 The user WINSERV3\Andy connected to port VPN8-1 has been disconnected because no network protocols were successfully negotiated. I have configured the router to pass both TCP packets on 1723 and GRE packets. I have used Wireshark (filtering out ARP, UDP, and all TCP ports other than 1723) to observe the packets received by the server. Wireshark does not explicitly name any protocol GRE, but it does tell me the server sent and received TCP, PPTP, PPP LCP, PPP CHAP, PPP CBCP, and PPP IPCP. The connection seems to go wrong at packet 30, where the protocol is PPP LCP, with the payload of the packet being labeled "Protocol Reject". Obviously, this is going from server to client. This would seem to lead to the conclusion that there is something wrong with my client, which runs Windows 7 Ultimate x64. However, it is able to connect to my house's router, which runs the DD-WRT firmware and is thus a PPTP endpoint. I'm thoroughly at a loss. Please help!

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• ssh keys rejected each day

  - by EddyR

  I've had OpenSSH server running on my debian server for a couple weeks and all of a sudden now when I go to login the next day it rejects my ssh key and I have to manually add a new one each time. Not only that but I have the "tunneling with clear-text passwords" option enabled and the non-root (login with root is disabled) account for that is rejected too. I'm at a loss why this is happening and I can't find any ssh options that would explain it. --update-- I just changed debug level to DEBUG. But before that I'm seeing a lot of the following in auth.log Feb 1 04:23:01 greenpages CRON[7213]: pam_unix(cron:session): session opened for user root by (uid=0) Feb 1 04:23:01 greenpages CRON[7213]: pam_unix(cron:session): session closed for user root ... Feb 1 04:36:26 greenpages sshd[7217]: reverse mapping checking getaddrinfo for nat-pool-xx-xx-xx-xx.myinternet.net [xx.xx.xx.xx] failed - POSSIBLE BREAK-IN ATTEMPT! ... Feb 1 04:37:31 greenpages sshd[7223]: Did not receive identification string from xx.xx.xx.xx ... My sshd_conf file settings are: # Package generated configuration file # See the sshd(8) manpage for details # What ports, IPs and protocols we listen for Port xxx # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel DEBUG # Authentication: LoginGraceTime 120 PermitRootLogin no StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding no X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server UsePAM no ClientAliveInterval 60 AllowUsers myuser

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• Internet slowed down because of SQUID Server setup

  - by Ranjith Kumar

  Recently I have setup a squid server for our office. I have computer (A) with two ethernet cards, one for internet and the second one for local networkIt has Ubuntu server OS with squid-server and dhcp3-server installedI have added few iptable rules to work like a router and redirect all http traffic to 3128 port This link is my reference. Everything worked fine for 2 days. All of a sudden internet speed went down drastically. When I connected the internet cable to my laptop to test the internet speed it was fine. Again when I reconnected it back to computer A everything was normal. This happened 4 times in a week. Could anyone here please help me why the internet speed is going down and it becomes normal when I reconnect the cable. EDIT: Rebooting the system (computer A) didn't make a difference. I have changed iptables so that http traffic doesn't redirect to 3128 port any further, still no change in the internet speed. I think the problem is not with squid but with something else. Here are my iptable rules SQUID_SERVER="10.1.1.1" INTERNET="eth1" LAN_IN="eth0" SQUID_PORT="3128" PROXYSERVERS=(Atlanta Baltimore Boston Chicago Dallas Denver Houston KansasCity LosAngeles Miami NewYork Philadelphia Phoenix SanAntonio SanDiego SanJose Seattle Washington) SERVERLEN=${#PROXYSERVERS[*]} I=0 iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F iptables -t mangle -X modprobe ip_conntrack modprobe ip_conntrack_ftp echo 1 /proc/sys/net/ipv4/ip_forward iptables -P INPUT DROP iptables -P OUTPUT ACCEPT iptables -A INPUT -i lo -j ACCEPT iptables -A OUTPUT -o lo -j ACCEPT iptables -A INPUT -i $INTERNET -m state --state ESTABLISHED,RELATED -j ACCEPT iptables --table nat --append POSTROUTING --out-interface $INTERNET -j MASQUERADE iptables --append FORWARD --in-interface $LAN_IN -j ACCEPT iptables -A INPUT -i $LAN_IN -j ACCEPT iptables -A OUTPUT -o $LAN_IN -j ACCEPT while [ $I -lt $SERVERLEN ]; do iptables -t nat -A PREROUTING -i $LAN_IN -p tcp -d ${PROXYSERVERS[$I]}.wonderproxy.com --dport 80 -j ACCEPT let I++ done iptables -t nat -A PREROUTING -i $LAN_IN -p tcp --dport 80 -j DNAT --to $SQUID_SERVER:$SQUID_PORT iptables -A INPUT --protocol tcp --dport 80 -j ACCEPT iptables -A INPUT --protocol tcp --dport 443 -j ACCEPT iptables -A INPUT --protocol tcp --dport 22 -j ACCEPT iptables -A INPUT -j LOG iptables -A INPUT -j DROP

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• HTB.init / tc behind NAT

  - by Ben K.

  I have an Ubuntu 10 box that I'm trying to set up as a bandwidth-shaping router. The machine has one WAN interface, eth0 and two LAN interfaces, eth1 and eth2. NAT is configured using MASQUERADE as described at InternetConnectionSharing. I'm mostly concerned with shaping outbound traffic from the LAN interfaces -- in the end, I'd like to end up with a hard 768Kbps limit per-LAN-interface (rather than a limit on eth0 pooled across all interfaces). I installed HTB.init, and riffing on the examples, tried to set this up on eth1 by putting three files into /etc/sysconfig/htb: /etc/sysconfig/htb/eth1 DEFAULT=30 R2Q=100 /etc/sysconfig/htb/eth1-2.root RATE=768Kbps BURST=15k /etc/sysconfig/htb/eth1-2:30.dfl RATE=768Kbps CEIL=788Kbps BURST=15k LEAF=sfq I can /etc/init.d/htb start and /etc/init.d/htb stats and see information that /seems/ to suggest it's working...but when I try pulling a large file via the WAN interface the shaping clearly isn't in effect. Any suggestions? My guess is it has something to do with where the shaping falls in the NAT chain, but I really have no idea where to begin troubleshooting this. ---- Update: Here's my /etc/init.d/htb list output, it seems to make sense -- the default rate for eth1 is 768Kbps? ### eth0: queueing disciplines qdisc htb 1: root refcnt 2 r2q 100 default 30 direct_packets_stat 0 qdisc sfq 30: parent 1:30 limit 127p quantum 1514b perturb 10sec ### eth0: traffic classes class htb 1:2 root rate 768000bit ceil 768000bit burst 1599b cburst 1599b class htb 1:30 parent 1:2 leaf 30: prio 0 rate 6144Kbit ceil 6144Kbit burst 15Kb cburst 1598b ### eth0: filtering rules filter parent 1: protocol ip pref 100 u32 filter parent 1: protocol ip pref 100 u32 fh 800: ht divisor 1 filter parent 1: protocol ip pref 100 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 1:30 match 00000000/00000000 at 12 match 00000000/00000000 at 16 ### eth1: queueing disciplines qdisc htb 1: root refcnt 2 r2q 100 default 30 direct_packets_stat 0 qdisc sfq 30: parent 1:30 limit 127p quantum 1514b perturb 10sec ### eth1: traffic classes class htb 1:2 root rate 768000bit ceil 768000bit burst 1599b cburst 1599b class htb 1:30 parent 1:2 leaf 30: prio 0 rate 6144Kbit ceil 6144Kbit burst 15Kb cburst 1598b

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• What is the point of PPPoE?

  - by aaa90210

  I am trying to expand my knowledge of networking beyond the basics. I have started reading about PPP, and how it is used in DSL modems with PPPoE and PPPoA. My first impression of PPP was "well that seems pretty similar to Ethernet". They are both data link layer protocols. They both have fields to identify the encapsulated protocol (e.g. IP). They both have related protocols to assign IP addresses (DHCP and NCP). So my first question was "so what's the point of PPP, why not just use Ethernet?". The answer to that was fairly straightforward - Ethernet is not supported over a wide range of media like serial lines, and is a fairly specific technology to LAN's using CAT5 or similar. HOWEVER - then I was reading about PPPoE, and the obvious thought was "well if we are doing something over Ethernet, then Ethernet must be available and in use, so why not just use it?". In other words, PPPoE seems to be encapsulating one data-link layer protocol in another very similar protocol. Why do IP-inside-PPP-inside-Ethernet when we could just be doing IP-inside-Ethernet, and use DHCP rather than NCP to assign the IP address to the home router? Thanks

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• VPN issue: SSTP Service service started and then stopped

  - by Ampersand

  When I was trying to set up a VPN connect on my laptop running Windows 7 Ultimate, I got this error: Network Connections Cannot load the Remote Access Connection Manager service. Error 711: The operation could not finish because it could not start the Remote Access Connection Manager service in time. Please try the operation again. I traced through some service dependencies and discovered that Secure Socket Tunneling Protocol Service was set to Manual. However, when I try to manually start the service, I get: Services The Secure Socket Tunneling Protocol Service on Local Computer started and then stopped. Some services stop automatically if they are not in use by other services or programs. Setting all the services involved to Automatic did not help. SSTP just showed Automatic and Stopped in the Services panel. I found a solution that involved booting in Safe Mode and deleting the contents of C:\Windows\System32\LogFiles\WMI\RtBackup. This solution worked, and I could set up a vpn connection, but only until I rebooted again. TL;DR I'm looking for a way to permanently enable Secure Socket Tunneling Protocol Service and other vpn-related services permanently so I don't have to reboot into safe mode and delete files every time I need to connect to a vpn.

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• CentOS tftp server is broken

  - by Mike Pennington

  I'm trying to run tftpd from xinetd on CentOS 6; however, I can only tftp from localhost. I have a file in /opt/tftpboot/fw.test.conf that I can retrieve if I tftp to localhost: [mpenning@localhost ~]$ tftp localhost tftp> get fw.test.conf tftp> quit [mpenning@localhost ~]$ ls fw.test.conf [mpenning@localhost ~]$ However, I cannot receive this file if I tftp to eth1 on this server (the address on eth1 is 172.16.1.4). [mpenning@localhost ~]$ sudo tshark -i eth1 udp and host 172.16.1.5 Running as user "root" and group "root". This could be dangerous. Capturing on eth1 0.000000 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 5.000133 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 10.000184 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 15.000297 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 20.000331 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 ^C5 packets captured [mpenning@localhost ~]$ I have the following xinetd configuration: [root@localhost mpenning]# cat /etc/xinetd.d/tftp # default: off # description: The tftp server serves files using the trivial file transfer \ # protocol. The tftp protocol is often used to boot diskless \ # workstations, download configuration files to network-aware printers, \ # and to start the installation process for some operating systems. service tftp { socket_type = dgram protocol = udp wait = yes user = root server = /usr/sbin/in.tftpd server_args = -s /opt/tftpboot disable = no per_source = 11 cps = 100 2 flags = IPv4 } [root@localhost mpenning]#

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• How do I specify the emergency location in CDP?

  - by chrish

  In the LLDP-MED and Cisco Discovery Protocol whitepaper, it compares LLDP-MED and CDP. The part I am interested in is emergency location configuration. In LLDP-MED, I can specify the Emergency Line Indentification Number (ELIN) and that number will be used by some IP Phones (e.g. Aastra) when placing emergency calls. The whitepaper states: Location Identification Discovery This capability is important because it normally provides location information from the switch to the phone. (If the phone is configured with location information or can determine its location, then it may send this information to the switch. However, the real value is getting this information from the switch to the phone for phones that cannot determine their own location.) Location identification discovery allows the phone to be aware of its location-information that can be used for location-based applications on the phone. More importantly, this capability can be used to provide location information when making emergency calls. Both Cisco Discovery Protocol and LLDP-MED support the transportation of location information. However, LLDP-MED has more supported data formats than Cisco Discovery Protocol. I have found the documentation on how to set the location and associate the location to the interfaces for LLDP-MED. How is this done for CDP? Is ELIN supported for CDP?

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• ISA 2000 and COD MW2 Steam

  - by twlichty

  OK, so maybe not the "proper use" of network resources, but we enjoy the odd COD game during lunch hours. When we played COD4, we had a dedicated server setup at the back of the server room. With MW2, we need to be able to connect to steam to be able to play multi-player. I've found this support article here: https://support.steampowered.com/kb%5Farticle.php?ref=8571-GLVN-8711 Which outlines all the ports I need to open. I went through and created the following rules in ISA 2000 (I'm stuck with 2000 for now). Protocol Definition: Steam Primary connection: Port 27000, UDP, Send Receive Secondary Connection: Port range 27001-27030 Send Receive Protocol Definition: Steam TCP In Primary connection: 27014, TCP, Inbound Secondary Connection: Port range: 27015-27050, Inbound Protocol Definition: Steam 4380 Primary connection: 4380, UDP, Send Receive When I start steam on my local workstation (I did add an exception to the Vista Firewall to allow steam), the steam client sits on "Updating Steam" for 5 minutes then errors out with: You must connect to the internet first. Any ideas? I assume I missed something. Thanks for your help.

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• PHP include() through HTTP makes Apache time out

  - by Adam Interact

  I have a problem with ExpressionEngine2 after moving from an old server to WHM/cPanel running on CentOS6.4. Simple test code to reproduce that issue: <?php $protocol = strpos(strtolower($_SERVER['SERVER_PROTOCOL']),'https') === FALSE ? 'http' : 'https'; $host = $_SERVER['HTTP_HOST']; include($protocol . '://' . $host . '/header.html'); ?> <p> Main text...</p> <?php include($protocol . '://' . $host . '/footer.html'); ?> Where header.html looks like <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Untitled Document</title> </head> <body> and footer.html looks like: </body> </html> Creates Apache time out: Warning: include(http://www.domain.com/header.html) [function.include]: failed to open stream: Connection timed out in /home/domain/public_html/test/index.php on line 5 Warning: include() [function.include]: Failed opening 'http://www.domain.com/header.html' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/domain/public_html/test/index.php on line 5 Main text... Warning: include(http://www.domain.com/footer.html) [function.include]: failed to open stream: Connection timed out in /home/domain/public_html/test/index.php on line 12 Warning: include() [function.include]: Failed opening 'http://www.domain.com/footer.html' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/domain/public_html/test/index.php on line 12 Any clue what can be wrong with Apache or PHP configuration? Thanks

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• php_ibm_db2.dll on IIS 7.5 using PHP 5.3 error message

  - by grmbl

  I'm trying to use ibm_db2 extension to access iSeries DB2 database. This is the testcode (taken from here) <?php $database = 'ALI452BFAL'; //library $user = 'STN452'; $password = '**********'; $hostname = 'myserverip'; $port = 50000; $conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;" . "HOSTNAME=$hostname;PORT=$port;PROTOCOL=TCPIP;UID=$user;PWD=$password;"; $conn = db2_connect($conn_string, '', ''); if ($conn) { print "ok"; db2_close($conn); } else { echo db2_conn_error() . '<br>' . db2_conn_errormsg(); } ?> I have installed a very basic package containing the db2 driver and added this as an extension. (IBM Data Server Driver for ODBC, CLI, and .NET.msi) This is my result: 08001 [IBM][CLI Driver] SQL30081N A communication error has been detected. Communication protocol being used: "TCP/IP". Communication API being used: "SOCKETS". Location where the error was detected: "10.10.0.120". Communication function detecting the error: "connect". Protocol specific error code(s): "10061", "", "". SQLSTATE=08001 SQLCODE=-30081 Anybody tried this before??

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• NoMachine NX window closes after establishing connection

  - by blackicecube

  I am trying to use nomachine nx server and client. But somehow it doen't work. What happens is the following: Client starts up Client authenticates with Server The NoMachine window appears for 2-4 seconds The NoMachine window exists Somehow a "closeEvent" is sent. Here's what I see in the log file: [Thu Sep 24 11:20:37 2009]: Starting nxcomp with options: 'NX 299 Switch connection to: NX mode: unencrypted options: nx/nx,options=/home/foo/.nx/S-adnws029-1022-7EEF1367361DB2A7F4D9F76B06F4B434/options:1022'. [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor: opened file: [/home/foo/.nx/S-adnws029-1022-7EEF1367361DB2A7F4D9F76B06F4B434/session] [Thu Sep 24 11:20:38 2009]: LoginDialog::ShowConnectionStatus code=[246] str=[Initializing X protocol compression] error=[0] [Thu Sep 24 11:20:38 2009]: ProgressDialog::printNxStatus: [Initializing X protocol compression] [Thu Sep 24 11:20:38 2009]: LoginDialog::ShowConnectionStatus code=[247] str=[Established the display connection] error=[0] [Thu Sep 24 11:20:38 2009]: ProgressDialog::printNxStatus: [Established the display connection] [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: LoginDialog: slotAgentTimer [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: QClipboard: Unknown SelectionClear event received. [Thu Sep 24 11:20:38 2009]: LoginDialog: slotAgentTimer [Thu Sep 24 11:20:38 2009]: LoginDialog: Agent found closing windows... [Thu Sep 24 11:20:38 2009]: LoginDialog: setting automatic reconnection to true. [Thu Sep 24 11:20:38 2009]: Settings::flush [Thu Sep 24 11:20:38 2009]: Settings::flush [Thu Sep 24 11:20:38 2009]: LoginDialog: closeEvent received! [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: LoginDialog::destructor called begin [Thu Sep 24 11:20:38 2009]: LoginDialog: stopAllTimers [Thu Sep 24 11:20:38 2009]: LoginDialog: stopProgressTimer [Thu Sep 24 11:20:38 2009]: Utility::getPreferencesFile: 'nxclient' - '/home/foo/.nx/config/nxclient.cfg' [Thu Sep 24 11:20:38 2009]: Settings::flush [Thu Sep 24 11:20:38 2009]: Called destructor for protocol class [Thu Sep 24 11:20:38 2009]: LoginDialog::destructor called end Anyone with a helpful idea?

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• SSH multi-hop connections with netcat mode proxy

  - by aef

  Since OpenSSH 5.4 there is a new feature called natcat mode, which allows you to bind STDIN and STDOUT of local SSH client to a TCP port accessible through the remote SSH server. This mode is enabled by simply calling ssh -W [HOST]:[PORT] Theoretically this should be ideal for use in the ProxyCommand setting in per-host SSH configurations, which was previously often used with the nc (netcat) command. ProxyCommand allows you to configure a machine as proxy between you local machine and the target SSH server, for example if the target SSH server is hidden behind a firewall. The problem now is, that instead of working, it throws a cryptic error message in my face: Bad packet length 1397966893. Disconnecting: Packet corrupt Here is an excerpt from my ~/.ssh/config: Host * Protocol 2 ControlMaster auto ControlPath ~/.ssh/cm_socket/%r@%h:%p ControlPersist 4h Host proxy-host proxy-host.my-domain.tld HostName proxy-host.my-domain.tld ForwardAgent yes Host target-server target-server.my-domain.tld HostName target-server.my-domain.tld ProxyCommand ssh -W %h:%p proxy-host ForwardAgent yes As you can see here, I'm using the ControlMaster feature so I don't have to open more than one SSH connection per-host. The client machine I tested this with is an Ubuntu 11.10 (x86_64) and both proxy-host and target-server are Debian Wheezy Beta 3 (x86_64) machines. The error happens when I call ssh target-server. When I call it with the -v flag, here is what I get additionally: OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011 debug1: Reading configuration data /home/aef/.ssh/config debug1: Applying options for * debug1: Applying options for target-server.my-domain.tld debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: auto-mux: Trying existing master debug1: Control socket "/home/aef/.ssh/cm_socket/[email protected]:22" does not exist debug1: Executing proxy command: exec ssh -W target-server.my-domain.tld:22 proxy-host.my-domain.tld debug1: identity file /home/aef/.ssh/id_rsa type -1 debug1: identity file /home/aef/.ssh/id_rsa-cert type -1 debug1: identity file /home/aef/.ssh/id_dsa type -1 debug1: identity file /home/aef/.ssh/id_dsa-cert type -1 debug1: identity file /home/aef/.ssh/id_ecdsa type -1 debug1: identity file /home/aef/.ssh/id_ecdsa-cert type -1 debug1: permanently_drop_suid: 1000 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.0p1 Debian-3 debug1: match: OpenSSH_6.0p1 Debian-3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-7ubuntu1 debug1: SSH2_MSG_KEXINIT sent Bad packet length 1397966893. Disconnecting: Packet corrupt

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• Vyatta internet connection + hosted site on same IP

  - by boburob

  Having a small issue setting up a vyatta. The company internet and two different websites are both on the same IP. Server 1 - Has websites hosted on ports 1000 and 3000 and also has a proxy server installed to provide internet connection to the domain Server 2 - Has a website hosted on ports 80 and 433 The vyatta is correctly natting the appropriate traffic to each server, and allowing the proxy to get internet traffic, however I have a problem getting to the websites hosted on these two servers inside the domain. I believe the problem is that the HTTP request is being sent with an IP, eg: 12.34.56.78. The request will reach the website and the server will attempt to send the request back to the IP, however this is the IP of the Vyatta, so it has nowhere else to go. I thought the solution would be something like this: rule 50 { destination { address 12.34.56.78 port 1000 } inbound-interface eth1 inside-address { address 10.19.2.3 } protocol tcp type destination } But this doesnt seem to do it! UPDATE I changed the rules to the following: rule 50 { destination { address 12.34.56.78 port 443 } outbound-interface eth1 protocol tcp source { address 10.19.2.3 } type masquerade } rule 51 { destination { address 12.34.56.78 port 443 } inbound-interface eth1 inside-address { address 10.19.2.2 } protocol tcp type destination } I am now seeing traffic going between the two with Wireshark, but the website will still fail to load.

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• Why Wireshark does not recognize this HTTP response?

  - by Alois Mahdal

  I have a trivial CGI script that outputs simple text content. It's written in Perl and using CGI module and it specifies only the most basic headers: print $q->header( -type => 'text/plain', -Content_length => $length, ); print $stuff; There's no apparent issue with functionality, but I'm confused about the fact that Wireshark does not recognize the HTTP response as HTTP--it's marked as TCP. Here is request and response: GET /cgi-bin/memfile/memfile.pl?mbytes=1 HTTP/1.1 Host: 10.6.130.38 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko/20100101 Firefox/11.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: cs,en-us;q=0.7,en;q=0.3 Accept-Encoding: gzip, deflate Connection: keep-alive HTTP/1.1 200 OK Date: Thu, 05 Apr 2012 18:52:23 GMT Server: Apache/2.2.15 (Win32) mod_ssl/2.2.15 OpenSSL/0.9.8m Content-length: 1048616 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: text/plain; charset=ISO-8859-1 XXXXXXXX... And here is the packet overview (Full packet is here on pastebin) No. Time Source srcp Destination dstp Protocol Info tcp.stream abstime 5 0.112749 10.6.130.38 80 10.6.130.53 48072 TCP [TCP segment of a reassembled PDU] 0 20:52:23.228063 Frame 5: 1514 bytes on wire (12112 bits), 1514 bytes captured (12112 bits) Ethernet II, Src: Dell_97:29:ac (00:1e:4f:97:29:ac), Dst: Dell_3b:fe:70 (00:24:e8:3b:fe:70) Internet Protocol Version 4, Src: 10.6.130.38 (10.6.130.38), Dst: 10.6.130.53 (10.6.130.53) Transmission Control Protocol, Src Port: http (80), Dst Port: 48072 (48072), Seq: 1, Ack: 330, Len: 1460 Now when I see this in Wireshark: there's usual TCP handshake then the GET request shown as HTTP with preview then the next packet contains the response, but is not marked as an HTTP response--just a generic "[TCP segment of a reassembled PDU]", and is not caught by "http.response" filter. Can somebody explain why Wireshark does not recognize it? Is there something wrong with the response?

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• MacOS creates a new mount on AFP path calls

  - by jAndy

  Hi Folks, following scenario: In my webapp, my customers are using Firefox as target browser. They have the need to open afp:// folders via Javascript. To make a long story short, this really works. You need to setup Firefox with about:config and set the value network.protocol-handler.external.afp to true. What happens then, the operating system (OSX) takes care of that path and it correctly opens a Finder window. The problem: OSX does create a new mount every time. It cannot distinct between afp://host/path/111 and afp://host/path/222 for instance. Furthermore, even if the afp path is 100% identical a new mount is created. It looks like this is the default behavior from OSX regardless of Firefox. So, is there any chance I can tell OSX not to create a new mount for some sub directorys which should get access over afp:// ? update: It looks like, there are OSX applications which can change the default behavior for network protocols. So you can change "somewhere" which application OSX should call for a protocol. If that is true, wouldn't it be possible to create a script which just opens the local path without a afp:// prefix ? The question here is, where is that configuration (?) to tell OSX which application to use for specific protocol. Any help welcome!

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