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  • ssh connectivity issue

    - by achal tomar
    I have a CentOS 5.5 server hosted in a remote data center. I usually access this server from a Red Hat Enterprise Linux 5 server using the ssh command. Now my organization has implemented a proxy server, this is not allowing me to connect to the VPS server. I see the following error using the command root@<ip address>:-: ssh: connect to host <ip address> PORT 22: connection refused. Can anybody help me with this issue?

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  • Alternate way to create a clone of a UNIX System

    - by Spirit
    THE STORY: (If you don't like to read much, down below is the question :) ) Where I work we have two HP RP2470 servers same hardware same number of hard drives same everything :). One of them is a production server and runs HP-UX 11.00. The poor ba***rd hasn't been turned off for years and now I have to make a clone of it on the other server - just in case, for redundancy. The problem is simple (or not simple) as I have to make the the other server exactly the same. However the old version of OS (UX 11.00 is a history now) and the old software running on it, have made my task almost impossible. On the production server there is also a cloning/recover utility Ignite-UX. I tried many times to create a recovery tape with it. Then when I load the tape on the backup server, it succeeds with the loading of the tape (no errors no warnings) but on the next restart it fails to load the OS :S and drops into HP`s ISL prompt. --- THE QUESTION: Is there an alternate way to create a clone of the Unix System? The environment is: 1. 2x HP RP2470 Servers (non-Intel), same hardware, same number od HDDs (two each of them) same everything. 2. OS running: HP-UX 11.00 The production server has to be cloned without downtime - sadly :( as I hope that they will reconsider on this one For example (like on Windows platforms), if you try to copy an entire HDD with Windows inside on another HDD, and then put that HDD on another PC it will still work, as long as the hardware is the same. Can I do something like that with a Unix system? Can I somehow COPY the contents of the entire HDD, put those on another HDD, and then just load the HDD into the other server? (If you haven't read the story the servers are exactly the same) Will it work? Can it be done with ordinary commands like cp or dump or something like that? Does any one have a similar experience? --- UPDATE: 26.01.2012 NOTE: The update is related to "The Story". If you haven't read that part then you can skip this update. This is just a short update on the recover logs from the Ignite Tape.. someone with more exp. might notice something.. ... --- READING CONTENTS OF THE IGNITE TAPE --- --- OUTPUT OMITED --- ... ... x ./configure3, 413696 bytes, 808 tape blocks x ./monitor_bpr, 20480 bytes, 40 tape blocks * Download_mini-system: Complete * Loading_software: Begin * Installing boot area on disk. * Enabling swap areas. * Backing up LVM configuration for "vg00". * Processing the archive source (Recovery Archive). * Wed Jan 25 15:27:32 EST 2012: Starting archive load of the source (Recovery Archive). * Positioning the tape (/dev/rmt/0mn). * Archive extraction from tape is beginning. Please wait. * Wed Jan 25 15:39:52 EST 2012: Completed archive load of the source (Recovery Archive). * Executing user specified script: "/opt/ignite/data/scripts/os_arch_post_l". * Running in recovery mode (os_arch_post_l). * Running the ioinit command ("/sbin/ioinit -c") * Creating device files via the insf command. insf: Installing special files for sdisk instance 0 address 0/0/1/1.15.0 insf: Installing special files for sdisk instance 1 address 0/0/2/0.1.0 insf: Installing special files for sdisk instance 2 address 0/0/2/1.15.0 insf: Installing special files for stape instance 0 address 0/0/1/0.3.0 insf: Installing special files for btlan instance 0 address 0/0/0/0 insf: Installing special files for btlan instance 1 address 0/2/0/0 insf: Installing special files for pseudo driver dlpi insf: Installing special files for pseudo driver kepd insf: Installing special files for pseudo driver framebuf insf: Installing special files for pseudo driver sad * Running "/opt/upgrade/bin/tlinstall -v" and correcting transition link permissions. * Constructing the bootconf file. * Setting primary boot path to "0/0/1/1.15.0". * Executing: "/var/adm/sw/products/PHSS_20146/pfiles/iux_postload". * Executing: "/var/adm/sw/products/PHSS_25982/pfiles/iux_postload". NOTE: tlinstall is searching filesystem - please be patient NOTE: Successfully completed * Loading_software: Complete * Build_Kernel: Begin NOTE: Since the /stand/vmunix kernel is already in place, the kernel will not be re-built. Note that no mod_kernel directives will be processed. * Build_Kernel: Complete * Boot_From_Client_Disk: Begin * Rebooting machine as expected. NOTE: Rebooting system. sync'ing disks (0 buffers to flush): 0 buffers not flushed 0 buffers still dirty Closing open logical volumes... Done Console reset done. Boot device reset done. ********** VIRTUAL FRONT PANEL ********** System Boot detected ***************************************** LEDs: RUN ATTENTION FAULT REMOTE POWER FLASH OFF OFF ON ON LED State: Running non-OS code. (i.e. Boot or Diagnostics) ... ... ... --- SERVER IS PERFORMING POST SEQUENCE HERE --- --- OUTPUT OMITED --- ... ... ... ***************************************** ************ EARLY BOOT VFP ************* End of early boot detected ***************************************** Firmware Version 43.50 Duplex Console IO Dependent Code (IODC) revision 1 ------------------------------------------------------------------------------ (c) Copyright 1995-2002, Hewlett-Packard Company, All rights reserved ------------------------------------------------------------------------------ Processor Speed State CoProcessor State Cache Size Number State Inst Data --------- -------- --------------------- ----------------- ------------ 0 650 MHz Active Functional 750 KB 1.5 MB 1 650 MHz Idle Functional 750 KB 1.5 MB Central Bus Speed (in MHz) : 120 Available Memory : 2097152 KB Good Memory Required : 16140 KB Primary boot path: 0/0/1/1.15 Alternate boot path: 0/0/2/1.15 Console path: 0/0/4/1.643 Keyboard path: 0/0/4/0.0 Processor is starting autoboot process. To discontinue, press any key within 10 seconds. 10 seconds expired. Proceeding... Trying Primary Boot Path ------------------------ Booting... Boot IO Dependent Code (IODC) revision 1 HARD Booted. ISL Revision A.00.38 OCT 26, 1994 ISL booting hpux ISL>

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  • nmap says 0 hosts up even though I can ping

    - by Austin
    I'm running Metasploit from Win 7 x64, and I've set up my Metasploitable 2 virtual machine on VMware Player. I can ping Metasploitable's IP address from the Metasploit console, however if I use nmap it says: Note: Host seems down. If it is really up, but blocking our ping probles, try -Pn I try it with the -Pn switch, it says Nmap done: 1 IP address (0 hosts up) scanned in 0.64 seconds I've disabled my Windows firewall and I'm running Metasploit as admin. Why can't I nmap my virtual machine?

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  • Why can host and nslookup resolve a name but dig cannot?

    - by musashiXXX
    Can anyone tell me why this is happening? I can resolve a hostname using host and/or nslookup but forward lookups do not work with dig; reverse lookups do: musashixxx@box:~$ host someserver someserver.somenet.internal has address 192.168.0.252 musashixxx@box:~$ host 192.168.0.252 252.0.168.192.in-addr.arpa domain name pointer someserver.somenet.internal. musashixxx@box:~$ nslookup someserver Server: 192.168.0.253 Address: 192.168.0.253#53 Name: someserver.somenet.internal Address: 192.168.0.252 musashixxx@box:~$ nslookup 192.168.0.252 Server: 192.168.0.253 Address: 192.168.0.253#53 252.0.168.192.in-addr.arpa name = someserver.somenet.internal. musashixxx@box:~$ dig someserver ; <<>> DiG 9.8.1-P1 <<>> someserver ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 55306 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;someserver. IN A ;; Query time: 0 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Oct 3 15:47:38 2012 ;; MSG SIZE rcvd: 27 musashixxx@box:~$ dig -x 192.168.0.252 ; <<>> DiG 9.8.1-P1 <<>> -x 192.168.0.252 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28126 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;252.0.168.192.in-addr.arpa. IN PTR ;; ANSWER SECTION: 252.0.168.192.in-addr.arpa. 3600 IN PTR someserver.somenet.internal. ;; Query time: 0 msec ;; SERVER: 192.168.0.253#53(192.168.0.253) ;; WHEN: Wed Oct 3 15:49:11 2012 ;; MSG SIZE rcvd: 86 Here's what my resolv.conf looks like: nameserver 192.168.0.253 search somenet.internal Is this behavior normal? Any thoughts?

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  • Sending a UDP message to a computer inside a network

    - by Dan
    Say I have the ip and mac address of a computer inside a network and I wish to send him a UDP message. By initializing the mac and ip addresses of the sent message to the given, when the network router recives the message he should pass it to the computer with the same mac address...right? Im asking becuase a program I write dosent seem to handle this limitation. it works great when its on the same network, but otherwise ...nada. Thanks

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  • Can't seem to run Apache 2.2 on Ubuntu 10.10 (Maverick Meerkat)

    - by Pam
    Here's my error message when I run sudo apachectl start: (98)Address already in use: make_sock: could not bind to address 127.0.0.1:80 no listening sockets available, shutting down Unable to open logs Action 'start' failed. The Apache error log may have more information. myUser@myMachine:/etc $ sudo apachectl stop httpd (no pid file) not running I'm brand new to Ubuntu (and Linux) and downloaded Apache 2.2 (worker) through Synaptic. I found a httpd.conf flavor I liked and am using it.

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  • IP NAT pool range

    - by hfranco
    When is it necessary to setup a pool of more than one address? So if I have this ip pool range: ip nat pool demo 72.32.11.65 72.32.11.66 netmask 255.255.255.252 What's the difference if I just have one address? ip nat pool demo 72.32.11.65 72.32.11.65 netmask 255.255.255.252

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  • Why doesn't apache restart after configuring SSL?

    - by poz2k4444
    I've installed apache2 and then configured it to work with SSL following this and this tutorials, the problem becomes when I try to restart the service, I get the following error: (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??

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  • Using google apps mail with my existing gmail account

    - by Barney White
    Please help!, Here is my situation: I've been doing business using my current gmail address ([email protected]) and really wanted my mail address to read [email protected], so i looked into google apps. It says you can set up custom emails with your domain name, achieving the above goal, but how do i configure these addresses to run through my CURRENT gmail account? I have everything pretty well set up, and it would be very time consuming to effectively start again...Any help would be greatly appreciated. Many thanks. Barney

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  • DNS and name server in centos 6.3 64 bit is not pinged out side

    - by user135855
    I got a problem with centOS 6.3 64-bit. I want to setup my nameserver with bind here. I am listing all my configuration [root@izyon92 ~]# cat/etc/hosts -------------- 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 182.19.26.92 izyon92.zyonize1.com izyon92 [root@izyon92 ~]# cat /etc/sysconfig/network --------------------------------------------- NETWORKING=yes HOSTNAME=izyon92.zyonize1.com GATEWAY=182.19.26.89 [root@izyon92 ~]# cat /etc/resolv.conf -------------------------------------------- # Generated by NetworkManager search zyonize1.com nameserver 182.19.26.92 [root@izyon92 ~]# cat /etc/named.conf -------------------------------------------- // // named.conf // // Provided by Red Hat bind package to configure the ISC BIND named(8) DNS // server as a caching only nameserver (as a localhost DNS resolver only). // // See /usr/share/doc/bind*/sample/ for example named configuration files. // options { #listen-on port 53 { 127.0.0.1; }; listen-on-v6 port 53 { none; }; directory "/var/named"; dump-file "/var/named/data/cache_dump.db"; statistics-file "/var/named/data/named_stats.txt"; memstatistics-file "/var/named/data/named_mem_stats.txt"; allow-query { 182.19.26.92; }; recursion yes; dnssec-enable yes; dnssec-validation yes; dnssec-lookaside auto; /* Path to ISC DLV key */ bindkeys-file "/etc/named.iscdlv.key"; managed-keys-directory "/var/named/dynamic"; }; logging { channel default_debug { file "data/named.run"; severity dynamic; }; }; zone "." IN { type hint; file "named.ca"; }; include "/etc/named.rfc1912.zones"; include "/etc/named.root.key"; [root@izyon92 ~]# cat /etc/named.rfc1912.zones -------------------------------------------------- // named.rfc1912.zones: // // Provided by Red Hat caching-nameserver package // // ISC BIND named zone configuration for zones recommended by // RFC 1912 section 4.1 : localhost TLDs and address zones // and http://www.ietf.org/internet-drafts/draft-ietf-dnsop-default-local-zones-02.txt // (c)2007 R W Franks // // See /usr/share/doc/bind*/sample/ for example named configuration files. // zone "localhost.localdomain" IN { type master; file "named.localhost"; allow-update { none; }; }; zone "localhost" IN { type master; file "named.localhost"; allow-update { none; }; }; zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN { type master; file "named.loopback"; allow-update { none; }; }; zone "1.0.0.127.in-addr.arpa" IN { type master; file "named.loopback"; allow-update { none; }; }; zone "0.in-addr.arpa" IN { type master; file "named.empty"; allow-update { none; }; }; zone "zyonize1.com" { type master; file "/var/named/zyonize.com.hosts"; }; [root@izyon92 ~]# cat /var/named/zyonize.com.hosts --------------------------------------------------------- $ttl 38400 zyonize1.com. IN SOA 182.19.26.92. dev\.izyon.gmail.com. ( 1347436958 10800 3600 604800 38400 ) zyonize1.com. IN NS 182.19.26.92. zyonize1.com. IN A 182.19.26.92 www.zyonize1.com. IN A 182.19.26.92 izyon92.zyonize1.com. IN A 182.19.26.92 I have disabled selinux and stopped iptables. dig and nslookup is working fine in the same machine [root@izyon92 ~]# dig zyonize1.com ---------------------------------------- ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.2 <<>> zyonize1.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55751 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;zyonize1.com. IN A ;; ANSWER SECTION: zyonize1.com. 38400 IN A 182.19.26.92 ;; AUTHORITY SECTION: zyonize1.com. 38400 IN NS 182.19.26.92. ;; Query time: 0 msec ;; SERVER: 182.19.26.92#53(182.19.26.92) ;; WHEN: Fri Sep 14 00:09:19 2012 ;; MSG SIZE rcvd: 72 [root@izyon92 ~]# nslookup zyonize1.com ---------------------------------------------- Server: 182.19.26.92 Address: 182.19.26.92#53 Name: zyonize1.com Address: 182.19.26.92 But here is the problem I am facing, I have windows machine, to test this dns and nameserver I set the first IPv4 DNS server to 182.19.26.92. Here is the details Connection-specific DNS Suffix: Description: Realtek PCIe GBE Family Controller Physical Address: ?14-FE-B5-9F-3A-A8 DHCP Enabled: No IPv4 Address: 192.168.2.50 IPv4 Subnet Mask: 255.255.255.0 IPv4 Default Gateway: 192.168.2.1 IPv4 DNS Servers: 182.19.26.92, 182.19.95.66 IPv4 WINS Server: NetBIOS over Tcpip Enabled: Yes Link-local IPv6 Address: fe80::45cc:2ada:c13:ca42%16 IPv6 Default Gateway: IPv6 DNS Server: when I am pining from this machine it is not finding the server. Where as in another server with another live IP with Fedora ping is working fine.

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  • Cobbler 2.2.2 problems

    - by Peter
    I have setup a dedicated LAN for Cobbler tests. My setup is: Cobbler server: openSUSE 12.3, cobbler 2.2.2 (from openSUSE repos) Imported distros: Centos 6.5, Red Hat 6.5, Red Hat 7.0, openSUSE 13.1 Target Machine: VMs in a Windows 7 Virtualbox Systems provisioning works OK, but I have some problems. The first one is that cobbler does not honor the "pxe_just_once: 1" setting. When the setup of the target OS is finished, after the reboot the target systems continues to PXE boot! The second problem is that the target server is not correctly configured! See my setup: cobbler system report --name=test Name : test TFTP Boot Files : {} Comment : Fetchable Files : {} Gateway : 192.168.0.1 Hostname : testcob1.example.com Image : IPv6 Autoconfiguration : False IPv6 Default Device : Kernel Options : {} Kernel Options (Post Install) : {} Kickstart : <<inherit>> Kickstart Metadata : {} LDAP Enabled : False LDAP Management Type : authconfig Management Classes : [] Management Parameters : <<inherit>> Monit Enabled : False Name Servers : ['192.168.0.1', '8.8.8.8'] Name Servers Search Path : [] Netboot Enabled : False Owners : ['admin'] Power Management Address : Power ID : Power Password : Power Management Type : ipmitool Power Username : Profile : RHEL-6.5-x86_64 Proxy : <<inherit>> Red Hat Management Key : <<inherit>> Red Hat Management Server : <<inherit>> Repos Enabled : False Server Override : <<inherit>> Status : testing Template Files : {} Virt Auto Boot : <<inherit>> Virt CPUs : <<inherit>> Virt Disk Driver Type : <<inherit>> Virt File Size(GB) : <<inherit>> Virt Path : <<inherit>> Virt RAM (MB) : <<inherit>> Virt Type : <<inherit>> Interface ===== : eth0 Bonding Opts : Bridge Opts : DHCP Tag : DNS Name : Master Interface : Interface Type : IP Address : 192.168.0.200 IPv6 Address : IPv6 Default Gateway : IPv6 MTU : IPv6 Secondaries : [] IPv6 Static Routes : [] MAC Address : Management Interface : True MTU : Subnet Mask : 255.255.255.0 Static : True Static Routes : [] Virt Bridge : So, although I have setup the hostname and the network interface of the target system, after the setup, the hostname is set to localhost.localdomain and eth0 is configured as a DHCP not static! How can I find the problem and fix it? Note that I have synced and restarted cobbler a couple of times, but the problems persists.

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  • Port forwarding not working properly

    - by sudo work
    I'm trying to host a small web server from my home network; however, I have not been able to successfully port forward ports to the local server. My current network topology looks like this: Cable Modem/Router - Secondary Wireless Router - Many computers (including server) The modem/router I'm using is a Cisco (Scientific Atlantic) DPC2100, provided by my ISP. The wireless router that I'm using as the central hub to my home network is a Linksys E3000. The computer being used as a server is running Ubuntu 10.04 Server Edition. The main issue is that I can't access the server remotely, using my WAN IP address. I have port forwarded my wireless router; however, I believe that I need to somehow set my modem to bridge mode. As far as I can tell though, this isn't possible. Here are the various IP address settings: DPC2100 WAN: 69.xxx.xxx.xxx Internal IP: 192.168.100.1 Internal Network: 192.168.7.0 E3000 IP Address: 192.168.7.2 Gateway: 192.168.7.1 Internal IP: 192.168.1.1 Internal Network: 192.168.1.0 Server IP Address: 192.168.1.123 Gateway: 192.168.1.1 Now I can do an nmap at various nodes, and here are the results (from the server): nmap localhost: 22,25,53,80,110,139,143,445,631,993,995,3306,5432,8080 open nmap 192.168.7.2: 22,25,80 (filtered),110,139,445 open (ports I have forwarded in the E3000)* nmap 69.xxx.xxx.xxx: 1720 open *For some reason, I can SSH into the server at 192.168.7.2, but not view the website. Here are also some other settings: /etc/hosts/ 127.0.0.1 localhost 127.0.1.1 servername ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters /etc/apache2/sites-available/default snippet <VirtualHost *:80> DocumentRoot /srv/www/ <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> ... </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> ... </Directory> ErrorLog /var/log/apache2/error.log LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> ... </Directory> </VirtualHost> Let me know if you need any other information; some stuff probably slipped my mind.

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  • Ubuntu getting wrong hostname from DHCP

    - by sam
    When provisioning new Ubuntu Precise (12.04) servers, the hostname they're getting seems to be generated from the DNS search path, not a reverse lookup on the hostname. Take the following configuration BIND is configured with the hostname, and reverse name Normal zone $TTL 600 $ORIGIN srv.local.net. @ IN SOA ns0.local.net. hostmaster.local.net. ( 2014082101 10800 3600 604800 600 ) @ IN NS ns0.local.net. @ IN MX 5 mail.local.net. my-new-server IN A 10.32.2.30 And reverse @ IN SOA ns0.local.net. hostmaster.local.net. ( 2014082101 10800 3600 604800 600 ) @ IN NS ns0.local.net. $ORIGIN 32.10.in-addr.arpa. 30.2 IN PTR my-new-server.srv.local.net. Then DHCPD is configured to hand out static leases based on mac addresses like so subnet 10.32.2.0 netmask 255.255.254.0 { option subnet-mask 255.255.254.0; option routers 10.32.2.1; option domain-name-servers 10.32.2.1; option domain-name "util.of1.local.net of1.local.net srv.local.net"; site-option-space "pxelinux"; option pxelinux.magic f1:00:74:7e; if exists dhcp-parameter-request-list { option dhcp-parameter-request-list = concat(option dhcp-parameter-request-list,d0,d1,d2,d3); } group { option pxelinux.configfile "pxelinux.cfg/pxeboot"; host my-new-server { fixed-address my-new-server.srv.local.net; hardware ethernet aa:aa:aa:bb:bb:bb; } } } So the hostname should be my-new-server.srv.local.net, however when building a Ubuntu 12.04 node, the hostname ends up as my-new-server.util.of1.local.net When building Lucid (10.04) hosts, the hostname will be correct, it's only on Precise/12.04 nodes we have the problem. Doing a normal and reverse lookup on the host and IP returns the correct result Sams-MacBook-Pro:~ sam$ host my-new-server my-new-server.srv.local.net has address 10.32.2.30 Sams-MacBook-Pro:~ sam$ host my-new-server.srv.local.net my-new-server.srv.local.net has address 10.32.2.30 Sams-MacBook-Pro:~ sam$ host 10.32.2.30 30.2.32.10.in-addr.arpa domain name pointer my-new-server.srv.local.net. The contents of the hosts file is incorrect too 127.0.0.1 localhost 127.0.1.1 my-new-server.util.of1.local.net of1.local.net srv.local.net my-new-server So it looks like when it creates the hosts file, it puts the entire contents of the DNS search path into the local address so the FQDN according to the server is the short hostname as defined, then the first domain in the search path. Is there a way to get around this behaviour, or fix this so it gets the hostname correctly? It's picking up the first part of the hostname, then the rest is wrong.

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  • Is this distributed database server idea feasible?

    - by David
    I often use SQLite for creating simple programs in companies. The database is placed on a file server. This works fine as long as there are not more than about 50 users working towards the database concurrently (though depending on whether it is reads or writes). Once there are more than this, they will notice a slowdown if there are a lot of concurrent writing on the server as lots of time is spent on locks, and there is nothing like a cache as there is no database server. The advantage of not needing a database server is that the time to set up something like a company Wiki or similar can be reduced from several months to just days. It often takes several months because some IT-department needs to order the server and it needs to conform with the company policies and security rules and it needs to be placed on the outsourced server hosting facility, which screws up and places it in the wrong localtion etc. etc. Therefore, I thought of an idea to create a distributed database server. The process would be as follows: A user on a company computer edits something on a Wiki page (which uses this database as its backend), to do this he reads a file on the local harddisk stating the ip-address of the last desktop computer to be a database server. He then tries to contact this computer directly via TCP/IP. If it does not answer, then he will read a file on the file server stating the ip-address of the last desktop computer to be a database server. If this server does not answer either, his own desktop computer will become the database server and register its ip-address in the same file. The SQL update statement can then be executed, and other desktop computers can connect to his directly. The point with this architecture is that, the higher load, the better it will function, as each desktop computer will always know the ip-address of the database server. Also, using this setup, I believe that a database placed on a fileserver could serve hundreds of desktop computers instead of the current 50 or so. I also do not believe that the load on the single desktop computer, which has become database server will ever be noticable, as there will be no hard disk operations on this desktop, only on the file server. Is this idea feasible? Does it already exist? What kind of database could support such an architecture?

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  • 450 Error with Postfix

    - by Shiv
    I have setup postfix to send outgoing mail, It works fine for most of the cases except for some e.g duke.alumni.edu where it gives me a 450 error, even though the email address is valid. This is the exact error I get Sender address rejected: Domain not found (in reply to RCPT TO command)) Any suggestions on how I can rectify this?

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  • Setting external IP for Citrix Web Interface

    - by Callum Jones
    I have a Citrix Web Interface (as part of XenApp 6.0 on Windows Server 2008 R2) that is behind a NAT, I can access the web interface fine (via both SSL and standard port 80) but when I go to launch a application that connection is still being made over the server's internal IP address. How do I configure the web interface to default to the external IP address of the box instead of its internal LAN IP?

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  • How come I can't redirect TCP ports on this wireless router?

    - by George Edison
    I am configuring a router to redirect TCP port 5900 (yes, this is for VNC) to a specific IP address on the network. Here is what I have: From a local computer on the same network, I can telnet to 192.168.1.64 (port 5900) just fine. However, when trying to telnet to the machine (port 5900) using its external IP address, it doesn't work. (The connection times out.) The router is a Gigaset SE567, if that helps.

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  • Does AWS resolve same-datacenter hostnames to 10.* addresses for different customer accounts?

    - by Scott Ritchie
    If I bring up two Amazon EC2 instances and run nslookup on one for the other's hostname, amazon will return a 10.* address. This is routable within amazon, and works just fine. But does this work between different accounts? If I use one of my nodes to nslookup a hostname belonging to another customer (but still in the same datacenter) will it resolve as a 10.* address or will it give the standard public IP?

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  • default virtual network interface

    - by Zulakis
    I got a single ethernet connection to a network but need multiple ips. Because of this, I am using virtual network interfaces like this: auto intern iface intern inet static address ... netmask ... gateway ...U auto intern:1 iface intern:1 inet static address ... netmask ... gateway ... I need to specify which IP should be used by default for outgoing traffic. How can I do that?

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  • SSH dns issue giving break-in error

    - by psion
    Address ..*.* maps to ec2---*-*.compute-1.amazonaws.com, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT! I keep getting this when I try to log-in to my remote server. I have it set for key authentication and when this error comes through, I still have to push through the password. I want to use this for automated Git pulls, and I can't have this kind of error message. anybody know what is going on here and how to fix it?

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  • Benefits of setting a webserver in Linux

    - by John Kent
    I wonder what main purposes and benefits can one get after he sets up a webserver running on Linux installed on a VM which is hosted by Windows and that this webserver can be used as a local host for windows ? That is, I have java application that is a webserver made on Linux, I set up the virtual machine for the windows client apps to listen to its (Linux)'s local IP address and port e.g 192.168.50.50:11111 When my webserver runs, I can use http://192.168.50.50/ as the windows's localhost address (instead of 127.0.0.1 as I usually do). Thank you

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  • ip conflict error

    - by mhay
    how to resolve ip conflict error ? i m getting my server's ip address when i m downloading from rapidshare ? and my ip address is different.

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  • Port scanning from localhost

    - by Jaels
    I see lot of tcp connections on different ports on my server with 'TIME_WAIT' status. Just simple port scan, but i cant see ip address of this bastard because connections is going from my nginx. Can you please give me a tip how can i see IP address of this bastard? Here is example: [root@vh9 ~]# netstat tcp 0 0 srv:http srv:53280 TIME_WAIT tcp 0 0 srv:http srv:53536 TIME_WAIT tcp 0 0 srv:http srv:52768 TIME_WAIT tcp 0 0 srv:http srv:53024 TIME_WAIT

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  • Can't connect my 3G to home router umbrella

    - by Cindi
    I can't connect my 3G iphone to my home router. I added my MAC wifi address (followed those directions to locate it) to the filter of the router. My iphone wifi address appears on the allowed list. However, when I try to connect using my iphone, it shows wi-fi not connected, and the umbrella corporation comes up still locked and asks for a password. We don't have a password set up for our router access at home. I'm not real tech-y so speak plainly...thanks

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