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  • Client-server application between two computers in the same network (using boost::asio)

    - by Edwin
    I'm trying to set up a basic communication between my desktop PC and my laptop (latter one using wireless connection) both being in the same network, using the boost::asio tutorials: synchronous client and synchronous server (in c++). When I run both the server and client on the same machine (using the localhost and the datetime port as parameters), it works splendidly. But if I try to set up the laptop as server (tested it with netstat -anb from the command prompt, it is indeed running and listening to port 13 as it's supposed to, and I even deactivated the firewall to make sure it doesn't cause any problems), I cannot connect to it with the client (set up on the PC), no matter what IP I tried (localhost, and basically any IPs that ipconfig -all gave me). So no matter what I tried, I cannot find the correct address that which the client can use to connect to the server. Could anyone help me please?

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  • How to make Connect Communications VPN connection in 10.10?

    - by Bilal Mohammad Qazi
    these steps were send by my iSP admin for ver10.10 and i'm using 11.10... step 1 sucessfully implemented till point 7 after that the problems are marked after '//' Step 2 i cannot completely do the step 2 How to make Connect Communications VPN connection in Ubuntu 10.10. 1st Step:- 1- Go to System > Administration > Synaptic Package Manage 2- Search for “PPTP”, check “network-manager-PPTP” and click “Apply” 3- Click on the Network Manager tray icon with your right mouse button and choose “Edit Connections…”. 4- Go to the “VPN” tab and click “Add”. 5- Choose “Point-to-Point Tunneling Protocol (PPTP)” as the VPN Connection Type 6- Check the VPN Connection Type and click “Create”. 7- Give your VPN connection a name and assign all the necessary information • Gateway = blue.connect.net.pk if you got Blue Package or • Gateway = green.connect.net.pk if you got Green Package or • Gateway = blueplus.connect.net.pk if you got BluePlus Package or • Gateway = red.connect.net.pk if you got Red Package • User name = Connect Communications Userid • Password = Connect Communications Password 8- Now Click on “Advanced” Authentication • Unchecked “PAP" // cannot uncheck • Unchecked “MSCHAP" // cannot uncheck • Unchecked “CHAP" • Checked only “MSCHAPv2" EAP shown in ver11.10 and cannot be unchecked Security And Compression. • Unchecked “Use Point-to-Point encryption (MPPE)”. • Unchecked “Allow statefull encryption”. • Unchecked “Allow BSD data Compression”. • Unchecked “Allow Deflate data Compression”. • Unchecked “Use TCP Header Compression”. • Unchecked “Send PPP echo Packets” Then Press “OK” then “Apply”. 9-Now you are able to connect to the specified VPN connection via the Networking Manager Then you can connect to VPN in the menu bar and your Internet icon will have a lock when the connection is successful. 2nd Step:- Open Terminal window. First, you open a terminal (Applications > Accessories > Terminal): Run command “sudo” Now gave root Password. Then run command “netstat -r -n” It will show some lines and for example from the last line pick the IP from 2nd column like 10.111.0.1 0.0.0.0 10.111.0.1 0.0.0.0 UG 0 0 0 eth0 Now run the fallowing command. echo “route add -net 10.101.8.0 netmask 255.255.252.0 gw 10.152.24.1” > /etc/rc.local note :- 10.111.0.1 is an example IP now run “ sh /etc/rc.local “

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  • DHCP server with multiple interfaces on ubuntu, destroys default gateway

    - by Henrik Alstad
    I use Ubuntu, and I have many interfaces. eth0, which is my internet connection, and it gets its info from a DHCP-server totally outisde of my control. I then have eth1,eth2,eth3 and eth4 which I have created a DHCP-server for.(ISC DHCP-Server) It seems to work, and I even get an IP-address from the foreign DHCP-server on the internet facing interface. However, for some reason it seems my gateway for eth0 became screwed after I installed my local DHCP-server for eth1-eth4. (I think so because I got an IP for eth0, and I can ping other stuff on the local network, but I cannot get access to the internet). My eth0-specific info in /etc/network/interfaces: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto eth1 iface eth1 inet static address 10.0.1.1 netmask 255.255.255.0 network 10.0.1.0 broadcast 10.0.1.255 gateway 10.0.1.1 mtu 8192 auto eth2 iface eth2 inet static address 10.0.2.1 netmask 255.255.255.0 network 10.0.2.0 broadcast 10.0.2.255 gateway 10.0.2.1 mtu 8192 My /etc/default/isc-dhcp-server: INTERFACES="eth1 eth2 eth3 eth4" So why does my local DHCP-server fuck up the gateway for eth0, when I tell it not to listen to eth0? Anyone see the problem or what I can do to fix it? The problem seems indeed to be the gateways. "netstat -nr" gives: 0.0.0.0 --- 10.X.X.X ---- 0.0.0.0 --- UG 0 0 0 eth3 It should have been 0.0.0.0 129.2XX.X.X 0.0.0.0 UG 0 0 0 eth0 So for some reason, my local DHCP-server overrides the gateway I get from the network DHCP. Edit: dhcp.conf looks like this(I included info only for eth1 subnet): ddns-update-style none; not authoritative; subnet 10.0.1.0 netmask 255.255.255.0 { interface eth1; option domain-name "example.org"; option domain-name-servers ns1.example.org, ns2.example.org; default-lease-time 600; max-lease-time 7200; range 10.0.1.10 10.0.1.100; host camera1_1 { hardware ethernet 00:30:53:11:24:6E; fixed-address 10.0.1.10; } host camera2_1 { hardware ethernet 00:30:53:10:16:70; fixed-address 10.0.1.11; } } Also, it seems that the gateway is correctly set if I run "/etc/init.d/networking restart" in a terminal, but that's not helpful for me, I need the correct gateway to be set during startup, and i'd rather find the source of the problem

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  • rkhunter 1.4 different results than version before?

    - by dschinn1001
    with rkhunter version before ubuntu-update from 12.04 to 12.10 I had NOT these warnings like listed here: Performing file properties checks Checking for prerequisites [ Warning ] /usr/sbin/adduser [ Warning ] /usr/sbin/chroot [ Warning ] /usr/sbin/cron [ Warning ] /usr/sbin/groupadd [ Warning ] /usr/sbin/groupdel [ Warning ] /usr/sbin/groupmod [ Warning ] /usr/sbin/grpck [ Warning ] /usr/sbin/nologin [ Warning ] /usr/sbin/pwck [ Warning ] /usr/sbin/rsyslogd [ Warning ] /usr/sbin/tcpd [ Warning ] /usr/sbin/useradd [ Warning ] /usr/sbin/userdel [ Warning ] /usr/sbin/usermod [ Warning ] /usr/sbin/vipw [ Warning ] /usr/bin/awk [ Warning ] /usr/bin/basename [ Warning ] /usr/bin/chattr [ Warning ] /usr/bin/curl [ Warning ] /usr/bin/cut [ Warning ] /usr/bin/diff [ Warning ] /usr/bin/dirname [ Warning ] /usr/bin/dpkg [ Warning ] /usr/bin/dpkg-query [ Warning ] /usr/bin/du [ Warning ] /usr/bin/env [ Warning ] /usr/bin/file [ Warning ] /usr/bin/find [ Warning ] /usr/bin/GET [ Warning ] /usr/bin/groups [ Warning ] /usr/bin/head [ Warning ] /usr/bin/id [ Warning ] /usr/bin/killall [ Warning ] /usr/bin/last [ Warning ] /usr/bin/lastlog [ Warning ] /usr/bin/ldd [ Warning ] /usr/bin/less [ Warning ] /usr/bin/locate [ Warning ] /usr/bin/logger [ Warning ] /usr/bin/lsattr [ Warning ] /usr/bin/lsof [ Warning ] /usr/bin/lynx [ Warning ] /usr/bin/mail [ Warning ] /usr/bin/md5sum [ Warning ] /usr/bin/mlocate [ Warning ] /usr/bin/newgrp [ Warning ] /usr/bin/passwd [ Warning ] /usr/bin/perl [ Warning ] /usr/bin/pgrep [ Warning ] /usr/bin/pkill [ Warning ] /usr/bin/pstree [ Warning ] /usr/bin/rkhunter [ Warning ] /usr/bin/rpm [ Warning ] /usr/bin/runcon [ Warning ] /usr/bin/sha1sum [ Warning ] /usr/bin/sha224sum [ Warning ] /usr/bin/sha256sum [ Warning ] /usr/bin/sha384sum [ Warning ] /usr/bin/sha512sum [ Warning ] /usr/bin/size [ Warning ] /usr/bin/sort [ Warning ] /usr/bin/stat [ Warning ] /usr/bin/strace [ Warning ] /usr/bin/strings [ Warning ] /usr/bin/sudo [ Warning ] /usr/bin/tail [ Warning ] /usr/bin/test [ Warning ] /usr/bin/top [ Warning ] /usr/bin/touch [ Warning ] /usr/bin/tr [ Warning ] /usr/bin/uniq [ Warning ] /usr/bin/users [ Warning ] /usr/bin/vmstat [ Warning ] /usr/bin/w [ Warning ] /usr/bin/watch [ Warning ] /usr/bin/wc [ Warning ] /usr/bin/wget [ Warning ] /usr/bin/whatis [ Warning ] /usr/bin/whereis [ Warning ] /usr/bin/which [ Warning ] /usr/bin/who [ Warning ] /usr/bin/whoami [ Warning ] /usr/bin/unhide.rb [ Warning ] /usr/bin/gawk [ Warning ] /usr/bin/lwp-request [ Warning ] /usr/bin/heirloom-mailx [ Warning ] /usr/bin/w.procps [ Warning ] /sbin/depmod [ Warning ] /sbin/fsck [ Warning ] /sbin/ifconfig [ Warning ] /sbin/ifdown [ Warning ] /sbin/ifup [ Warning ] /sbin/init [ Warning ] /sbin/insmod [ Warning ] /sbin/ip [ Warning ] /sbin/lsmod [ Warning ] /sbin/modinfo [ Warning ] /sbin/modprobe [ Warning ] /sbin/rmmod [ Warning ] /sbin/route [ Warning ] /sbin/runlevel [ Warning ] /sbin/sulogin [ Warning ] /sbin/sysctl [ Warning ] /bin/bash [ Warning ] /bin/cat [ Warning ] /bin/chmod [ Warning ] /bin/chown [ Warning ] /bin/cp [ Warning ] /bin/date [ Warning ] /bin/df [ Warning ] /bin/dmesg [ Warning ] /bin/echo [ Warning ] /bin/ed [ Warning ] /bin/egrep [ Warning ] /bin/fgrep [ Warning ] /bin/fuser [ Warning ] /bin/grep [ Warning ] /bin/ip [ Warning ] /bin/kill [ Warning ] /bin/less [ Warning ] /bin/login [ Warning ] /bin/ls [ Warning ] /bin/lsmod [ Warning ] /bin/mktemp [ Warning ] /bin/more [ Warning ] /bin/mount [ Warning ] /bin/mv [ Warning ] /bin/netstat [ Warning ] /bin/ping [ Warning ] /bin/ps [ Warning ] /bin/pwd [ Warning ] /bin/readlink [ Warning ] /bin/sed [ Warning ] /bin/sh [ Warning ] /bin/su [ Warning ] /bin/touch [ Warning ] /bin/uname [ Warning ] /bin/which [ Warning ] /bin/dash [ Warning ] It seems that rkhunter 1.4 is oversensitive somehow about changed bin-files ? chkrootkit finds nothing and no warnings too.

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  • My Website (ports) Have Been Hijacked!

    - by ChrisD
    This is one of the scary problems that turns out to have a pretty easy solution. I tried to view one of my websites hosted by IIS on my primary workstation and the site wouldn’t render.   I checked IIS Admin and the site was there, but I couldn’t access it on either port 443 or port 80. In reviewing the event log I found the following entry: The World Wide Web Publishing Service (WWW Service) did not register the URL prefix http://x.x.x.x:80/ for site 1. The site has been disabled. The data field contains the error number I disabled the IIS Service (issued Net Stop W3svc from an admin command prompt) and then scanned for anything listening on port 80. C:\Users\cdarrigo>netstat -ano |findstr 80   TCP    0.0.0.0:80             0.0.0.0:0              LISTENING       3124 This confirmed that something had hijacked my ports.  I had another process that was listening on port 80 and it was preventing IIS from serving up my site.   A quick phone call to a friend taught me that the last number shown above (3124) is the process id of the process that's listening on the port.  So whatever process had PID 3124 had to be stopped. I scanned my process list, and determined it was, much to my surprise, Skype.  I exited the Skype application and restarted the IIS service, then manually restarted the web site.  This time, browsing to my site resulted in successfully viewing my site. So why was Skype listening on those ports?  A quick Google search revealed the answer: “Skype listens on those ports to increase quality.” really? “you might become a supernode if those ports are open.” No thanks.  I’m not sure how accurate those statements are, but I want to disable this behavior in Skype none the less. Fortunately Skype provides a configuration option to turn off this behavior.   Launch Skype and log in.  From the Tools menu, select Options Select the Advanced options and then Connection Uncheck the box Use Port 80 and 443 as alternatives for incoming connections Back to development bliss.

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  • determine if udp socket can be accessed via external client

    - by JohnMerlino
    I don't have access to company firewall server. but supposedly the port 1720 is open on my one ubuntu server. So I want to test it with netcat: sudo nc -ul 1720 The port is listening on the machine ITSELF: sudo netstat -tulpn | grep nc udp 0 0 0.0.0.0:1720 0.0.0.0:* 29477/nc The port is open and in use on the machine ITSELF: lsof -i -n -P | grep 1720 gateway 980 myuser 8u IPv4 187284576 0t0 UDP *:1720 Checked the firewall on current server: sudo ufw allow 1720/udp Skipping adding existing rule Skipping adding existing rule (v6) sudo ufw status verbose | grep 1720 1720/udp ALLOW IN Anywhere 1720/udp ALLOW IN Anywhere (v6) But I try echoing data to it from another computer (I replaced the x's with the real integers): echo "Some data to send" | nc xx.xxx.xx.xxx 1720 But it didn't write anything. So then I try with telnet from the other computer as well: telnet xx.xxx.xx.xxx 1720 Trying xx.xxx.xx.xxx... telnet: connect to address xx.xxx.xx.xxx: Operation timed out telnet: Unable to connect to remote host Although I don't think telnet works with udp sockets. I ran nmap from another computer within the same local network and this is what I got: sudo nmap -v -A -sU -p 1720 xx.xxx.xx.xx Starting Nmap 5.21 ( http://nmap.org ) at 2013-10-31 15:41 EDT NSE: Loaded 36 scripts for scanning. Initiating Ping Scan at 15:41 Scanning xx.xxx.xx.xx [4 ports] Completed Ping Scan at 15:41, 0.10s elapsed (1 total hosts) Initiating Parallel DNS resolution of 1 host. at 15:41 Completed Parallel DNS resolution of 1 host. at 15:41, 0.00s elapsed Initiating UDP Scan at 15:41 Scanning xtremek.com (xx.xxx.xx.xx) [1 port] Completed UDP Scan at 15:41, 0.07s elapsed (1 total ports) Initiating Service scan at 15:41 Initiating OS detection (try #1) against xtremek.com (xx.xxx.xx.xx) Retrying OS detection (try #2) against xtremek.com (xx.xxx.xx.xx) Initiating Traceroute at 15:41 Completed Traceroute at 15:41, 0.01s elapsed NSE: Script scanning xx.xxx.xx.xx. NSE: Script Scanning completed. Nmap scan report for xtremek.com (xx.xxx.xx.xx) Host is up (0.00013s latency). PORT STATE SERVICE VERSION 1720/udp closed unknown Too many fingerprints match this host to give specific OS details Network Distance: 1 hop TRACEROUTE (using port 1720/udp) HOP RTT ADDRESS 1 0.13 ms xtremek.com (xx.xxx.xx.xx) Read data files from: /usr/share/nmap OS and Service detection performed. Please report any incorrect results at http://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 2.04 seconds Raw packets sent: 27 (2128B) | Rcvd: 24 (2248B). The only thing I can think of is a firewall or vpn issue. Is there anything else I can check for before requesting that they look at the firewall server again?

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  • Configuring VirtualBox host only networking: OSX host, Ubuntu guest

    - by Greg K
    I have a Ubuntu guest configured with two interfaces, eth0 is using NAT and works fine, I can access the net. The second interface eth1 is set to host only networking and VirtualBox has created a vboxnet0 virtual adapter on the host. I've configured vboxnet0 in VirtualBox adapter settings with the following: ip 192.168.21.20 subnet 255.255.255.0 Once the VM guest is running, ifconfig on OSX has vboxnet0 setup as: vboxnet0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 ether 0a:00:27:00:00:00 inet 192.168.21.20 netmask 0xffffff00 broadcast 192.168.21.255 In the guest, eth0 is set to use DHCP, I've statically assigned eth1 to 192.168.21.20 (is this a mistake?): auto eth1 iface eth1 inet static address 192.168.21.20 netmask 255.255.255.0 network 192.168.21.0 broadcast 192.168.21.255 gateway 192.168.21.1 There is no device on 192.168.21.1 - what should I set my gateway to? In the guest the routes look like so: Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.21.0 * 255.255.255.0 U 0 0 0 eth1 10.0.2.0 * 255.255.255.0 U 0 0 0 eth0 default 10.0.2.2 0.0.0.0 UG 100 0 0 eth0 default 192.168.21.1 0.0.0.0 UG 100 0 0 eth1 Route table on OSX: $ netstat -nr Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 10.77.36.1 UGSc 28 0 en1 10.77.36/22 link#5 UCS 5 0 en1 10.77.39.38 127.0.0.1 UHS 1 2236 lo0 10.77.39.255 link#5 UHLWbI 1 66 en1 127 127.0.0.1 UCS 0 0 lo0 127.0.0.1 127.0.0.1 UH 1 8642 lo0 169.254 link#5 UCS 0 0 en1 192.168.21 link#7 UC 2 0 vboxnet 192.168.21.20 a:0:27:0:0:0 UHLWI 0 4 lo0 192.168.21.255 link#7 UHLWbI 2 64 vboxnet I can't SSH from the host to the guest (I used to be able to when the VM was configured with a bridged connection): $ ssh 192.168.21.20 ssh: connect to host 192.168.21.20 port 22: Connection refused What have I done wrong here? TIA

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  • I cant get rid of apache2

    - by DaNieL
    It's obvious that I am a newbie with server amministration, my goal is to reach the knowledge needed to working with web services. I played with my debian server, and i messed up apache2; Now i want to completely* remove it from the server and then reinstall it as new. *for completely i really mean completely, logs, configurations, settings, everythings! I followed the steps suggested by freedom_is_chaos in this answer, and i guess apache2 is nomore installed, becose if i do apt-get remove apache2 i get this: Reading package lists... Done Building dependency tree Reading state information... Done Package apache2 is not installed, so not removed 0 upgraded, 0 newly installed, 0 to remove and 11 not upgraded. Then, i rebooted the server, and: # netstat -plant Active Internet connections (servers and established) [...] tcp6 0 0 :::80 :::* LISTEN 3467/apache2 [...] WTF? is apache2 still here? So seem: # /etc/init.d/apache2 stop Stopping web server: apache2. But: # update-rc.d remove apache2 update-rc.d: /etc/init.d/remove: file does not exist So, what is happening to my server? How can i completely and truly remove apache2 from my server?

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  • Whys is System process listening on Port 80?

    - by Seth Spearman
    I am running Windows 7 RC1. I have multiple issues getting IIS to work on my system and today when I installed a new application and I tried to load it using http:\localhost\MyApplication I get absolutely no errors and I get no page load. Just a pretty, white blank page. I did some digging and I found something about some other process listening on port 80 so I did a scan using netstat -aon | findstr 0.0:80 and discovered that PID 4 was listening on that port. PID 4 does not show in task manager so I fired up Process Explorer and it showed me that PID 4 is the System process. (Multiple google searches seems to indicate that System always uses PID 4). Since then I am basically stuck. I have no idea why System needs port 80 and what to do about it. If you google the following strings you will find two helpful Experts-Exchange articles at the top of the search results and you can read them for some helpful information. (If I gave the direct URL to the pages then Experts-Exchange would ask you to pay...but when you click on the results from a google search you can scroll all of the way to the bottom to read the exchanges.) Here are the google searches... "System Process is listening on port 80 (Vista)" "SYSTEM Process is listening on Port 80 and Preventing IIS Default Website from Running" The last entry from the first result showed how to do a trace of http.sys at the following URL: http://blogs.msdn.com/wndp/archive/2007/01/18/event-tracing-in-http-sys-part-1-capturing-a-trace.aspx Trace showed nothing useful. Any thoughts?

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  • ssh tunnel - bind: Cannot assign requested address

    - by JosephK
    Trying to create a socks (-D) ssh tunnel - Linux box to Linux box (both centos): sshd running on remote side ok. From local machine we do / see this: ssh -D 1080 [email protected]. [email protected]'s password: bind: Cannot assign requested address (where 8.8.8.8 is really my server's IP and 'user' is my real username) I am logged into the remote side in this terminal-window. I can verify that the local port was unused prior to this command, and then used by an ssh process, after the command, via: netstat -lnp | grep 1080 So, unlike most googled-responses with this error, the problem would not seem to be the loopback interface assignment. If I try to use this tunnel with a mail client, the local-side permits the attempt (no 'proxy-failed' error), but no data / reply is returned. On the remote side, I do have "PermitTunnel yes" in my sshd_config (though 'yes' should be the default, anyway). Ideas or Clues? Here is the relevant debug-output OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * .... debug1: Authentication succeeded (password). debug1: Local connections to LOCALHOST:1080 forwarded to remote address socks:0 debug1: Local forwarding listening on 127.0.0.1 port 1080. debug1: channel 0: new [port listener] debug1: Local forwarding listening on ::1 port 1080. bind: Cannot assign requested address debug1: channel 1: new [client-session] debug1: Entering interactive session. debug1: Sending environment. debug1: Sending env LANG = en_US.utf8 Other clue: If I run a Virtual Box on the client running Windows, open a tunnel with putty in that box, that tunnel, to the same remote server, works.

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  • Problem: Munin Graph

    - by Pablo
    I've been trying to install Munin for 15 days, I looked for information, analized logs, I even deleted and reinstalled Munin using YUM. I'm hosted at Media Temple on a VPS with CentOS. The problem is still there and It's driving me nuts. Graphics are shown as following: http://imageshack.us/photo/my-images/833/capturadepantalla201106u.png/ This is the configuration of my munin.conf file dbdir /var/lib/munin htmldir /var/www/munin logdir /var/log/munin rundir /var/run/munin [localhost] address **.**.***.*** #IP VPS This is the configuration of my munin-node.conf file log_level 4 log_file /var/log/munin/munin-node.log port 4949 pid_file /var/run/munin/munin-node.pid background 1 setseid 1 # Which port to bind to; host * user root group root setsid yes # Regexps for files to ignore ignore_file ~$ ignore_file \.bak$ ignore_file %$ ignore_file \.dpkg-(tmp|new|old|dist)$ ignore_file \.rpm(save|new)$ allow ^127\.0\.0\.1$ Thanks so much, I appreciate all the answers UPDATE munin-graph.log Jun 22 16:30:02 - Starting munin-graph Jun 22 16:30:02 - Processing domain: localhost Jun 22 16:30:02 - Graphed service : open_inodes (0.14 sec * 4) Jun 22 16:30:02 - Graphed service : sendmail_mailtraffic (0.10 sec * 4) Jun 22 16:30:02 - Graphed service : apache_processes (0.12 sec * 4) Jun 22 16:30:02 - Graphed service : entropy (0.10 sec * 4) Jun 22 16:30:02 - Graphed service : sendmail_mailstats (0.14 sec * 4) Jun 22 16:30:02 - Graphed service : processes (0.14 sec * 4) Jun 22 16:30:03 - Graphed service : apache_accesses (0.27 sec * 4) Jun 22 16:30:03 - Graphed service : apache_volume (0.15 sec * 4) Jun 22 16:30:03 - Graphed service : df (0.21 sec * 4) Jun 22 16:30:03 - Graphed service : netstat (0.19 sec * 4) Jun 22 16:30:03 - Graphed service : interrupts (0.14 sec * 4) Jun 22 16:30:03 - Graphed service : swap (0.14 sec * 4) Jun 22 16:30:04 - Graphed service : load (0.11 sec * 4) Jun 22 16:30:04 - Graphed service : sendmail_mailqueue (0.13 sec * 4) Jun 22 16:30:04 - Graphed service : cpu (0.21 sec * 4) Jun 22 16:30:04 - Graphed service : df_inode (0.16 sec * 4) Jun 22 16:30:04 - Graphed service : open_files (0.16 sec * 4) Jun 22 16:30:04 - Graphed service : forks (0.13 sec * 4) Jun 22 16:30:05 - Graphed service : memory (0.26 sec * 4) Jun 22 16:30:05 - Graphed service : nfs_client (0.36 sec * 4) Jun 22 16:30:05 - Graphed service : vmstat (0.10 sec * 4) Jun 22 16:30:05 - Processed node: localhost (3.45 sec) Jun 22 16:30:05 - Processed domain: localhost (3.45 sec) Jun 22 16:30:05 - Munin-graph finished (3.46 sec)

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  • Problems configuring an SSH tunnel to a Nexentastor appliance for use with headless Crashplan

    - by Rob Smallshire
    Problem I am attempting to configure an SSH tunnel to a NexentaStor appliance from either a Windows or Linux computer so that I can connect a Crashplan Desktop GUI to a headless Crashplan server running on the Nexenta box, according to these instructions on the Crashplan support site: Connect to a Headless CrashPlan Desktop. So far, I've failed to get a working SSH tunnel from from either either a Windows client (using Putty) or a Linux client (using command line SSH). I'm fairly sure the problem is at the receiving end with NexentaStor. A blog article - CrashPlan for Backup on Nexenta - indicates that it could be made to work only after "after enabling TCP forwarding in Nexenta in /etc/ssh/sshd_config" - although I'm not sure how to go about that or specifically what I need to do. Things I have tried Ensuring the Crashplan server on the Nexenta box is listening on port 4243 $ netstat -na | grep LISTEN | grep 42 127.0.0.1.4243 *.* 0 0 131072 0 LISTEN *.4242 *.* 0 0 65928 0 LISTEN Establishing a tunnel from a Linux host: $ ssh -L 4200:localhost:4243 admin:10.0.0.56 and then, from another terminal on the Linux host, using telnet to verify the tunnel: $ telnet localhost 4200 Trying ::1... Connected to localhost. Escape character is #^]'. with nothing more, although the Crashplan server should respond with something. From Windows, using PuTTY have followed the instructions on the Crashplan support site to establish an equivalent tunnel, but then telnet on Windows gives me no response at all and the Crashplan GUI can't connect either. The PuTTY log for the tunnelled connection shows reasonable output: ... 2011-11-18 21:09:57 Opened channel for session 2011-11-18 21:09:57 Local port 4200 forwarding to localhost:4243 2011-11-18 21:09:57 Allocated pty (ospeed 38400bps, ispeed 38400bps) 2011-11-18 21:09:57 Started a shell/command 2011-11-18 21:10:09 Opening forwarded connection to localhost:4243 but the telnet localhost 4200 command from Windows does nothing at all - it just waits with a blank terminal. On the NexentaStor server I've examined the /etc/ssh/sshd_config file and everything seems 'normal' - and I've commented out the ListenAddress entries to ensure that I'm listening on all interfaces. How can I establish a tunnel, and how can I verify that it is working?

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  • Reverse SSH Tunnel

    - by chris
    I am trying to forward web traffic from a remote server to my local machine in order to test out some API integration (tropo, paypal, etc). Basically, I'm trying to setup something similar to what tunnlr.com provides. I've initiated the ssh tunnel with the command $ssh –nNT –R :7777:localhost:5000 user@server Then I can see that server has is now listening on port 7777 with user@server:$netstat -ant | grep 7777 tcp 0 0 127.0.0.1:7777 0.0.0.0:* LISTEN tcp6 0 0 ::1:7777 :::* LISTEN $user@server:curl localhost:7777 Hello from local machine So that works fine. The curl request is actually served from the local machine. Now, how do I enable server.com:8888 to be routed through that tunnel? I've tried using nginx like so: upstream tunnel { server 0.0.0.0:7777; } server { listen 8888; server_name server.com; location / { access_log /var/log/nginx/tunnel-access.log; error_log /var/log/nginx/tunnel-error.log; proxy_pass http://tunnel; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_redirect off; } } From the nginx error log I see: [error] 11389#0: *1 connect() failed (111: Connection refused) I've been looking at trying to use iptables, but haven't made any progress. iptables seems like a more elegant solution than running nginx just for tunneling. Any help is greatly appreciated. Thanks!

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  • ip-up does not trigger when using built-in cisco vpn on mac osx lion

    - by Yasser Sobhdel
    I am using Cisco VPN client over lion and I want to make the ip-up and ip-down work. There is no sign of any action taken when I connect or disconnect this VPN connection. I really doubt whether the syntax has been changed or even this kind if connection is triggering the ip-up. Logically, it must be set over ppp but when using the following codes and instructions on them, there is no sign of any output in the log file: http://www.macfreek.nl/mindmaster/Modify_PPTP_Routing_Table http://www.aidanfindlater.com/use-vpn-for-specific-sites-on-mac-os-x Going for error, which there is no sign of it, using the following page: http://hints.macworld.com/article.php?story=20060616150640529 I couldn't find the /var/log/ppp/vpnd.log log file. Also the files are given full permission 0755 or a+x or even 777 using the following command: sudo chmod a+x /etc/ppp/ip-up Any clue on how to debug this would be appreciated. I am totally confused, netstat -rn -f inet doesn't show the routes. Even when the routes are added manually, closing the VPN connection does not run the ip-down and the routes must be deleted manually.

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  • nmap on my webserver shows TCP ports 554 and 7070 open

    - by atc
    I have a webserver that hosts various websites for me. The two services that are accessible outside are SSH and Apache2. These are running on a non-standard and standard port, respectively. All other ports are closed explicitly via arno-iptables-firewall. The host is running Debian Testing. I noticed that a scan of the host using nmap produced different results from different PCs. From my laptop on my home network (behind a BT Homehub), I get the following: Not shown: 996 filtered ports PORT STATE SERVICE 80/tcp open http 554/tcp open rtsp 7070/tcp open realserver 9000/tcp open cslistener whereas scanning from a US-based server with nmap 5.00 and a Linux box in Norway running nmap 5.21 I get the following: Not shown: 998 filtered ports PORT STATE SERVICE 80/tcp open http 9000/tcp open cslistener so I hope it's my internal network or ISP that's playing up, but I cannot be sure. Running a netstat -l | grep 7070 produces nothing. Similarly for port 554. Can anyone explain the peculiarities I'm seeing?

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  • mysqladmin - Unknown MySQL server host

    - by ert
    I'm trying to connect to a mysql server over a local network. The server is running and listening to post 41322. dylan~$ netstat -ln | s mysql unix 2 [ ACC ] STREAM LISTENING 41322 /var/run/mysqld/mysqld.sock My user is granted all rights from all addresses, and I can log in locally. dylan~$ mysqladmin -P 41322 -h [email protected] create database test mysqladmin: connect to server at '[email protected]' failed error: 'Unknown MySQL server host '[email protected]' (1)' Check that mysqld is running on [email protected] and that the port is 41322. You can check this by doing 'telnet [email protected] 41322' Adding a --verbose flag gives no additional output. I've commented out bind-address=127.0.0.1 in /etc/mysql/my.cnf on the server. I can ssh into the server without a problem. dylan~$ ps a | grep mysql 11131 pts/3 S 0:00 /bin/sh /usr/bin/mysqld_safe 11170 pts/3 Sl 0:03 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --port=3306 --socket=/var/run/mysqld/mysqld.sock 11171 pts/3 S 0:00 logger -p daemon.err -t mysqld_safe -i -t mysqld 13710 pts/1 S+ 0:00 grep mysq Any help or thoughts are appreciated.

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  • Why apache doesn't restart after configuring SSL?

    - by poz2k4444
    I've installed apache2 and then configure it to work with SSL following this and this tutorials, the problem becomes when I try to restart the service, the following error throws: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:443 no listening sockets available, shutting down Unable to open logs the output of netstat -anp | grep 443 just display firefox listening and anything else, how could I solve this and get the service running?? The ouput of ps -Af|grep <firefox PID> is: root 1949 1 11 18:42 tty1 00:20:55 /opt/firefox/firefox-bin root 2025 1949 4 18:43 tty1 00:08:39 /opt/firefox/plugin-container /root/.mozilla/plugins/libflashplayer.so -greomni /opt/firefox/omni.ja 1949 true plugin after closing firefox and then cheking again for port 443 the output is: tcp 0 0 10.32.208.179:38923 74.125.139.155:443 TIME_WAIT - tcp 0 0 10.32.208.179:45706 74.125.139.113:443 TIME_WAIT - tcp 0 0 10.32.208.179:40456 74.125.139.156:443 TIME_WAIT - tcp 0 0 10.32.208.179:56823 69.171.227.62:443 FIN_WAIT2 - unix 3 [ ] STREAM CONNECTED 12443 1721/dbus-daemon @/tmp/dbus-8ee35rmOOS Seeing the error logs, which are not at the time when I'm doing this, the last errors are: [Tue Oct 02 18:41:54 2012] [error] Init: Unable to read server certificate from file /etc/apache2/ssl/sever.crt [Tue Oct 02 18:41:54 2012] [error] SSL Library Error: 218529960 error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag [Tue Oct 02 18:41:54 2012] [error] SSL Library Error: 218595386 error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 error

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  • How can I close a port that appears to be orphaned by Xvfb?

    - by Jim Fiorato
    I'm running Xvfb on a FC8 Amazon EC2 image. On occasion Xvfb will crash (unable at the moment to find out the reason for the crash), and after crashing the TCP port will appear to be orphaned. I'm unable to get a PID to kill any process that may be using it. I'm starting Xvfb with: Xvfb :7 -screen 0 1024x768x24 & Examples of what I'm working with are below, the Xvfb port is (was) 6007: # netstat -ap Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:ssh *:* LISTEN 1894/sshd tcp 0 0 *:6007 *:* LISTEN - tcp 0 352 ip-10-84-69-165.ec2.int:ssh c-71-194-253-238.hsd1:51689 ESTABLISHED 2981/0 udp 0 0 *:bootpc *:* 1817/dhclient udp 0 0 *:bootpc *:* 1463/dhclient Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node PID/Program name Path unix 2 [ ] DGRAM 871 668/udevd @/org/kernel/udev/udevd unix 2 [ ACC ] STREAM LISTENING 5385 1880/dbus-daemon /var/run/dbus/system_bus_socket unix 6 [ ] DGRAM 5353 1867/rsyslogd /dev/log unix 2 [ ] DGRAM 11861 2981/0 unix 2 [ ] DGRAM 5461 1974/crond unix 2 [ ] DGRAM 5451 1904/console-kit-da unix 3 [ ] STREAM CONNECTED 5438 1880/dbus-daemon /var/run/dbus/system_bus_socket unix 3 [ ] STREAM CONNECTED 5437 1904/console-kit-da unix 3 [ ] STREAM CONNECTED 5396 1880/dbus-daemon unix 3 [ ] STREAM CONNECTED 5395 1880/dbus-daemon unix 2 [ ] DGRAM 5361 1871/rklogd # lsof -i COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME dhclient 1463 root 3u IPv4 4704 UDP *:bootpc dhclient 1817 root 4u IPv4 5173 UDP *:bootpc sshd 1894 root 3u IPv4 5414 TCP *:ssh (LISTEN) sshd 2981 root 3u IPv4 11825 TCP ip-10-84-69-165.ec2.internal:ssh->c-71-194-253-238.hsd1.il.comcast.net:51689 (ESTABLISHED) Attempting to force the port closed with iptables doesn't seem to work either. iptables -A INPUT -p tcp --dport 6007 -j DROP I'm at a loss as to how to reclaim/free the port. From what I can tell, this port will remain in this state until the EC2 instance is shut down. So, how can I close this port so I can restart Xvfb?

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  • port forwarding with VirtualBox

    - by Argh
    I have a virtualbox VM running ubuntu. The Ubuntu guest is running a web server which listens on port 3000 (http://127.0.0.1:3000) The host machine is windows vista. I have configured port forwarding using VBoxManage. If I query the config using VboxManage getextradata "MyMachine", I get Key: GUI/AutoresizeGuest, Value: on Key: GUI/Fullscreen, Value: off Key: GUI/LastCloseAction, Value: shutdown Key: GUI/LastWindowPostion, Value: 9,34,640,529,max Key: GUI/MiniToolBarAlignment, Value: bottom Key: GUI/MiniToolBarAutoHide, Value: off Key: GUI/SaveMountedAtRuntime, Value: yes Key: GUI/Seamless, Value: off Key: GUI/ShowMiniToolBar, Value: yes Key: VBoxInternal/Devices/pcnet/0/LUN#0/Config/guesthttp/GuestPort, Value: 3000 Key: VBoxInternal/Devices/pcnet/0/LUN#0/Config/guesthttp/HostPort, Value: 3000 Key: VBoxInternal/Devices/pcnet/0/LUN#0/Config/guesthttp/Protocol, Value: TCP This looks like it should work... However when I try to access the web server from the host machine (windows box) I dont get a response. I ran a netstat on the windows box and nothing appears to be listening on port 3000 which explains why forwrding isnt working. Note that I have already tested with my firewall switched off... The version of VirtualBox I am using is 3.1.4 Any ideas?

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  • Can't remotely connect through SQL Server Management Studio

    - by FAtBalloon
    I have setup a SQL Server 2008 Express instance on a dedicated Windows 2008 Server hosted by 1and1.com. I cannot connect remotely to the server through management studio. I have taken the following steps below and am beyond any further ideas. I have researched the site and cannot figure anything else out so please forgive me if I missed something obvious, but I'm going crazy. Here's the lowdown. The SQL Server instance is running and works perfectly when working locally. In SQL Server Management Studio, I have checked the box "Allow Remote Connections to this Server" I have removed any external hardware firewall settings from the 1and1 admin panel Windows firewall on the server has been disabled, but just for kicks I added an inbound rule that allows for all connections on port 1433. In SQL Native Client configuration, TCP/IP is enabled. I also made sure the "IP1" with the server's IP address had a 0 for dynamic port, but I deleted it and added 1433 in the regular TCP Port field. I also set the "IPALL" TCP Port to 1433. In SQL Native Client configuration, SQL Server Browser is also running and I also tried adding an ALIAS in the I restarted SQL server after I set this value. Doing a "netstat -ano" on the server machine returns a TCP 0.0.0.0:1433 LISTENING UDP 0.0.0.0:1434 LISTENING I do a port scan from my local computer and it says that the port is FILTERED instead of LISTENING. I also tried to connect from Management studio on my local machine and it is throwing a connection error. Tried the following server names with SQL Server and Windows Authentication marked in the database security. ipaddress\SQLEXPRESS,1433 ipaddress\SQLEXPRESS ipaddress ipaddress,1433 tcp:ipaddress\SQLEXPRESS tcp:ipaddress\SQLEXPRESS,1433

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  • Apache2, making my site publicly available

    - by Shackler
    Hello, I want to make my apache 2 development server public to the internet, it is a Django based website. Here is my apache2 config: <VirtualHost *:80> Alias /media /home/user/myproject/statics Alias /admin_media /home/myuser/django/Django-1.1.1/django/contrib/admin/media WSGIScriptAlias / /home/myuser/myproject/myproject_wsgi.py WSGIDaemonProcess myproject user=myuser group=myuser threads=25 WSGIProcessGroup myproject </VirtualHost> When I do netstat -lntup I get: Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN - tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN - tcp6 0 0 :::80 :::* LISTEN - tcp6 0 0 :::22 :::* LISTEN - tcp6 0 0 ::1:631 :::* LISTEN - udp 0 0 0.0.0.0:5353 0.0.0.0:* - udp 0 0 0.0.0.0:38582 0.0.0.0:* I connect with ADSL thus I am behind a router. For this I have made my computer DMZ enabled to my machine. What can be the problem? When I try to login with my ip, I get my routers config page, when a friend tries to connect to me from internet, he gets "not authorized".

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  • Munin node not listing any plugins on new Fedora 14 installation

    - by Dave Forgac
    I have just installed munin-node from the base repo on Fedora 14 and then started it. I found that my munin server is not able to collect data from this node so I tried connecting via telnet to test. When connecting via telnet I see that no plugins are listed: [dave@host ~]# telnet localhost 4949 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. # munin node at host.example.com list quit Connection closed by foreign host. [dave@host ~]# I did not modify anything after the installation. The munin-node.conf is allowing connections from 127.0.0.1 and the default set of plugins in /etc/munin/plugins/ are symlinked to the plugins in /usr/share/munin/plugins/. Here is the working output of the telnet test of the 'list' command should look like (this is on a Fedora 13 host): [dave@www ~]$ telnet localhost 4949 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. # munin node at www.example.com list apache_accesses apache_processes apache_volume cpu df df_inode entropy forks fw_packets if_err_eth0 if_err_eth1 if_eth0 if_eth1 interrupts iostat iostat_ios irqstats load memory munin_stats mysql_ mysql_bytes mysql_innodb mysql_queries mysql_slowqueries mysql_threads netstat open_files open_inodes postfix_mailqueue postfix_mailvolume proc_pri processes swap threads uptime users vmstat yum quit Connection closed by foreign host. [dave@www ~]$ Edited to show output of munin-node-configure: [root@host ~]# munin-node-configure Plugin | Used | Extra information ------ | ---- | ----------------- acpi | no | amavis | no | ... http_loadtime | no | if_ | yes | eth1 eth0 if_err_ | yes | eth0 eth1 ifx_concurrent_sessions_ | no | interrupts | yes | ... uptime | yes | users | yes | varnish_ | no | vserver_resources | no | yum | yes | zimbra_ | no | Any suggestions on what to check next?

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  • pure-ftpd not listening on specified port

    - by Jason McLaren
    I installed the pure-ftpd package (version 1.0.35-1) on an Ubuntu 12.04 box (an EC2 instance based on the standard Ubuntu 12.04 AMI). The pure-ftpd daemon is running (verified with ps), though there is no PID file (expected one to be created by the /etc/init.d/pure-ftpd script). Here's the resulting command that gets run by the init.d script: /usr/sbin/pure-ftpd -l pam -O clf:/var/log/pure-ftpd/transfer.log -o -8 UTF-8 -u 1000 -E -B -g /var/run/pure-ftpd/pure-ftpd.pid Here's my real problem: the ftp server isn't actually listening on any port (checked with netstat and nmap). So I can't ftp to the server (either locally using localhost or remotely using the public IP address). I tried adding a Bind file to /etc/pure-ftpd/conf and restarting, but it didn't help. When I installed pure-ftpd, it replaced inetd with openbsd-inetd, but did not run it since there were no services enabled. So inetd is not listening on port 21 either. (Apparently Ubuntu has a no-inetd-by-default policy, according to https://lists.ubuntu.com/archives/ubuntu-users/2010-September/227905.html .) I want to run pure-ftpd by itself (not with inetd) anyways, since the /etc/init.d/pure-ftpd script requires no inetd if you use the UploadScript feature. I'm not familiar with how Ubuntu handles network services (and can't find any relevant docs besides generic man pages), so I'm probably missing something obvious. Nothing seems out of the ordinary with /etc/hosts.allow (empty) or hosts.deny (empty), and I didn't add any firewall rules (iptables -L shows that the firewall is in its initial state). I've checked the pure-ftpd docs; not sure what else to look at. Any help would be appreciated, thanks!

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  • How To Remove Bottleneck with Squid Caching Proxy

    - by Volomike
    I'm more of a LAMP web developer trying to help the sysop. When I joined a project, I inherited some old PHP spaghetti code. Some of that code is that it goes out to a third-party website (let's call it thirdparty.com) and pulls down content with an HTTP-GET request. Unfortunately, the way the code is designed, it needs to do this several times a minute. When we looked at the bottlenecks on the server with 'netstat -a', we saw that connections to thirdparty.com were constantly running when this content would be plenty fine to be gathered once a day. What I need to know is if the Squid Proxy Caching Server is the solution we need? I'm guessing that this might let us have it pretend to be thirdparty.com on the network. If the web server needs to query thirdparty.com, it hits Squid instead. Squid can then determine whether it needs to supply content from cache or if it needs to go to thirdparty.com for fresh content. Is this the solution we need? And second, is this easily configured and only to cache thirdparty.com requests?

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  • Process killing trouble

    - by Aditya Singh
    I am trying to program a server software which involves a lot of testing on java / scala platform. Whenever i compile and execute the code. It starts listening on port 80. Sometimes i need to terminate it by Ctrl+C when it hangs. In that case, ubuntu is not freeing the port. So in order to run the process, i have to restart the machine. I see this at ps aux root 1924 0.0 0.0 5796 1660 pts/0 T 05:44 0:00 sudo scala - root 1925 0.2 1.5 491448 40796 pts/0 Tl 05:44 0:03 java -Xmx256M -Xms16M So process 1924 and 1925. I did sudo kill on both these. But then they keep on persisting even after a long time. sudo nmap -T Aggressive -A -v 127.0.0.1 -p 1-65000 Scanning localhost (127.0.0.1) [65000 ports] Discovered open port 80/tcp on 127.0.0.1 It means its still there ! sudo netstat --tcp --udp --listening --program tcp6 0 0 [::]:www [::]:* LISTEN 1925/java tcp6 0 0 ip6-localhost:ipp [::]:* LISTEN 1185/cupsd This means its 1925 - java How to kill it.

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