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• Server HTTP Load times slow?

  - by cdog5000

  Hello, My server @ codemeh.com (HTTP Server) seems to be randomly loading slowly, I cannot tell if it just my forums (http://www.codemeh.com/forums/) that are loading slowly or if the WHOLE site is just loading slowly since my forums are the largest thing on the site right now. load average: 0.02, 0.17, 0.20 That is super low to my knowledge. I have tried Google Page Analytic plug-in for FireFox to solve the problem but nothing comes up that is VERY bad. If someone could investigate this for me since I am very new at apache and server configurations. Thanks! (top): PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7493 www-data 15 0 98.2m 16m 9092 S 3 0.8 0:27.24 apache2 26429 www-data 15 0 98.2m 15m 7392 S 3 0.7 0:03.45 apache2 26477 www-data 17 0 98.2m 15m 7396 S 3 0.7 0:03.16 apache2 1 root 15 0 2468 1384 1156 S 0 0.1 0:00.49 init 1367 root 25 0 2564 816 660 S 0 0.0 0:00.00 xinetd 1526 root 15 0 29576 5420 1976 S 0 0.3 1:02.69 fail2ban-server 3703 root 15 0 13512 9312 1696 S 0 0.4 0:11.59 miniserv.pl 3915 postfix 15 0 6056 1652 1320 S 0 0.1 0:00.00 pickup 4010 root 15 0 4548 1296 972 S 0 0.1 0:37.36 ntpd 7448 root 15 0 98528 26m 20m S 0 1.3 0:00.27 apache2 7454 www-data 18 0 33580 2616 368 S 0 0.1 0:00.04 apache2 7528 www-data 18 0 108m 24m 15m S 0 1.2 0:27.60 apache2 7974 root 16 0 8700 2728 2164 S 0 0.1 0:00.08 sshd 8123 cdog5000 15 0 8832 1596 896 S 0 0.1 0:00.00 sshd 8126 cdog5000 18 0 4484 1716 1384 S 0 0.1 0:00.00 bash 8141 cdog5000 15 0 2344 980 796 R 0 0.0 0:00.11 top 13461 root 15 0 8700 2728 2164 S 0 0.1 0:00.07 sshd 13567 cdog5000 18 0 8832 1492 896 S 0 0.1 0:00.33 sshd 13569 cdog5000 18 0 4484 1728 1388 S 0 0.1 0:00.09 bash 17983 root 15 0 4392 1268 988 S 0 0.1 0:00.00 su 17987 root 15 0 4516 1752 1380 S 0 0.1 0:00.09 bash 18081 www-data 15 0 98.2m 14m 6588 S 0 0.7 0:04.91 apache2 20000 www-data 15 0 98.3m 15m 8040 S 0 0.8 0:02.45 apache2 20019 www-data 15 0 98.2m 14m 6808 S 0 0.7 0:04.97 apache2 30343 root 15 0 3964 1012 764 S 0 0.0 0:00.03 vsftpd 30382 root 15 0 2304 908 716 S 0 0.0 0:00.62 cron 30401 mysql 17 0 141m 17m 5416 S 0 0.9 1:02.20 mysqld 30424 root 15 0 5472 912 504 S 0 0.0 0:00.04 sshd 30473 syslog 15 0 1916 676 536 S 0 0.0 0:01.02 syslogd 30611 amavis 15 0 33872 25m 2292 S 0 1.2 0:03.11 amavisd-new 31890 amavis 18 0 34888 24m 1792 S 0 1.2 0:00.00 amavisd-new 31891 amavis 18 0 34888 24m 1784 S 0 1.2 0:00.00 amavisd-new 32397 clamav 18 0 104m 84m 1272 S 0 4.1 1:06.46 clamd 32563 clamav 15 0 12832 5716 4440 S 0 0.3 0:01.29 freshclam 32573 root 23 0 1892 456 372 S 0 0.0 0:00.00 courierlogger 32575 root 18 0 2096 684 544 S 0 0.0 0:00.01 authdaemond 32583 root 23 0 1892 360 284 S 0 0.0 0:00.00 courierlogger 32584 root 24 0 2000 612 516 S 0 0.0 0:00.00 couriertcpd 32598 root 23 0 1892 360 284 S 0 0.0 0:00.00 courierlogger 32599 root 25 0 2000 612 516 S 0 0.0 0:00.00 couriertcpd 32604 root 18 0 1892 460 372 S 0 0.0 0:00.00 courierlogger 32605 root 18 0 2000 624 532 S 0 0.0 0:00.00 couriertcpd 32607 root 18 0 2308 404 256 S 0 0.0 0:00.02 authdaemond 32608 root 18 0 2096 260 116 S 0 0.0 0:00.03 authdaemond 32609 root 15 0 2308 404 256 S 0 0.0 0:00.03 authdaemond 32610 root 18 0 2096 260 116 S 0 0.0 0:00.02 authdaemond 32612 root 18 0 2308 404 256 S 0 0.0 0:00.02 authdaemond 32621 root 24 0 1892 364 284 S 0 0.0 0:00.00 courierlogger 32622 root 25 0 2000 608 516 S 0 0.0 0:00.00 couriertcpd 32633 root 15 0 105m 936 716 S 0 0.0 0:02.26 nscd 32719 root 16 0 6252 1680 1344 S 0 0.1 0:01.24 master 32738 postfix 15 0 6188 1776 1400 S 0 0.1 0:00.44 qmgr 32758 postfix 15 0 6492 2564 1788 S 0 0.1 0:00.14 tlsmgr (/etc/apache2/sites-available/default): NameVirtualHost * <VirtualHost *> ServerAdmin webmaster@localhost DocumentRoot /var/www/web1/web/ <Directory /var/www/web1/web/> Options Indexes MultiViews AllowOverride None Order allow,deny allow from all </Directory> </VirtualHost> I have fail2ban server and I dont have any firewall at this point and time that I know of. SMF is 2.0 RC4 and apache version is 2.2.14. I run a MySQL server on another box in the same DC (Persistent Connection). I installed eAccelerator today and it didnt help.

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• Ubuntu 11.10 firewall/gateway - no client internet access

  - by Siriss

  I have read many other posts but cannot figure this out. eth0 is my external connected to a Comcast modem. The server has internet access with no issues. eth1 is internal and running DHCP for the clients. I have DHCP working just fine, all my clients can get an IP and ping the server but they cannot access the internet. I am using ISC-DHCP-SERVER and have set /etc/default/isc-dhcp-server to INTERFACE="eht1" Here is my dhcpd.conf file located in /etc/dhcp/dhcpd.conf ddns-update-style interim; ignore client-updates; subnet 10.0.10.0 netmask 255.255.255.0 { range 10.0.10.10 10.0.10.200; option routers 10.0.10.2; option subnet-mask 255.255.255.0; option domain-name-servers 208.67.222.222, 208.67.220.220; #OpenDNS # option domain-name "example.com"; default-lease-time 21600; max-lease-time 43200; authoritative; } I have made the *net.ipv4.ip_forward=1* change in /etc/sysctl.conf here is my interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp iface eth1 inet static address 10.0.10.2 netmask 255.255.255.0 network 10.0.10.0 auto eth1 And finally- here is my iptables.conf file: # Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *nat :PREROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A POSTROUTING -s 10.0.10.0/24 -o eth0 -j MASQUERADE #-A PREROUTING -i eth0 -p tcp --dport 59668 -j DNAT --to-destination 10.0.10.2:59668 COMMIT *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -i eth1 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT -A INPUT -m state --state NEW -m udp -p udp --dport 53 -j ACCEPT -A FORWARD -s 10.0.10.0/24 -o eth0 -j ACCEPT -A FORWARD -d 10.0.10.0/24 -m state --state ESTABLISHED,RELATED -i eth0 -j ACCEPT -A FORWARD -p icmp -j ACCEPT -A FORWARD -i lo -j ACCEPT -A FORWARD -i eth1 -j ACCEPT #-A FORWARD -i eth0 -m state --state NEW -m tcp -p tcp -d 10.0.10.2 --dport 59668 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT I am completely stuck. I cannot figure out why the clients cannot access the internet. Am I missing a service? Is a service not running? Any help would be greatly appreciated. I tried to be as thorough as possible but please let me know if I have missed something. Thank you!

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• What does the the reconstruction process of mdadm do exactly on raid10

  - by Azrael

  I've got a system with 4 disks set up as raid10. All disks are usable, and mdadm all states them with UUUU. Due to a recent system crash, the raid is currently reconstruction the raid as it was marked as "not clean," and a reconstruction process was started. On a closer look smartctl shows problems on one disk: sd 0:0:0:0: [sda] Unhandled sense code sd 0:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 0:0:0:0: [sda] Sense Key : Medium Error [current] [descriptor] Descriptor sense data with sense descriptors (in hex): 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 24 cd 78 d4 sd 0:0:0:0: [sda] Add. Sense: Unrecovered read error - auto reallocate failed sd 0:0:0:0: [sda] CDB: Read(10): 28 00 24 cd 75 1e 00 04 00 00 With a research about the reconstruction process, I only found information concerning raid5 but nothing for raid10. Can I replace this problematic disk during the reconstruction process, or will I kill the raid with this?

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• 2 "P4" power connectors *AND* an 8 pin EPS connector -- all necessary?

  - by chris

  I recently bought an Arima SW350 motherboard. It supports 16 ddr simms as well as 2 opteron 2xx CPUs, so I imagine it may have pretty heavy power requirements... It has a 24 pin ATX power connector, 2 4 pin "P4" power connectors, and an 8 pin EPS power connector. My supermicro power supply has a 24 pin ATX connector and the EPS connector, and one P4 connector. Can I safely run this thing with only one P4 connector plugged in? Can I safely get a "hard disk to P4" adapter and use that to power the other P4 connector on the motherboard? Do I just need a new power supply? The board's documentation is pretty thin on the topic.

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• Routing between two subnets. (Need Solution)

  - by rehanplus

  Need help according to scenario given: Client end PCs: 400 + Network : Server 1 (Linux) : 192.168.2.0/24 (For Application, Internet not working) GW: 192.168.2.1 Clients: 192.168.2.1 - 254 Server 2 (Linux) : 192.168.3.0/24 (For Internet users) GW: 192.168.3.1 Clients: 192.168.3.2 - 254 Server 2 is connected to DSL Broadband. Server 1 and Server 2 both are on same physical network i.e. Same switches. Current issue: i have to deploy a file and print server but this server will be accessed by both (192.168.2.x and 192.168.3.x) one same workgroup. as both subnets are on same switched network. Limitations: Currently there is no hardware routers and firewall. Need to complete this task with Linux / Windows / AD. Tested / Worked so far: Configured one PC with two NIC's With the IPS: NIC 1 : 192.168.3.2 GW: 192.168.3.1 Subnet: 255.255.255.0 NIC 2 : 192.168.2.2 GW: Empty Subnet: 255.255.255.0 Kindly provide any solution what should i do to get sharing enable on both Subnets. Thank you All

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• How to route traffic from VM (Parallels) over an Open VPN connection on the host (OS X)

  - by withakay

  Scenario: I have a Mac running Lion that is connected to an OpenVPN server I have a Windows XP VM (running on parallels, but I don't think this is important) I want to be able to route traffic from the XP VM via the host Mac's OpenVPN connection so that I can log on to a domain. The remote network is 172.16.0.0/23 (255.255.254.0) Open VPN is configured to supply address in the 10.100.101.0/24 range and sets up the routing to 172.16.0.0 using the gateway 10.100.101.1/32 My local network is 192.16.1.0/24 NOTE: I do not want to install OpenVPN into the XP virtual machine as I would have to use a passwordless key in order for OpenVPN to connect before logon. Anyone got any ideas?

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• Issue about mapping MAC address to Ipv6 address

  - by deepsky

  I know that the address in ipv6 with prefix range 001 to 111 should use a 64-bit interface identifier that follows the EUI-64 format, which translates the MAC to ipv6 as below. MAC:00-02-b3-1e-83-29 --> 02-02-b3-ff-fe-1e-83-29 --->ipv6 addr: fe80::202:b3ff:fe1e:8329 Then I checked my network status with ipconfig /all on my windows XP, but it seems my ipv6 address doesn't follow the above rule: MAC:00-24-81-XX-XX-XX ipv6 addr:2001:da8:8006:225:0:24:81XX:XXXX Obviously it doesn't follow the EUI-64 format. Instead it just directly use the MAC as the last 8 bytes. Anyone know the reason? Pls Correct me if I am wrong.

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• NFS compound failed for server foosrv: error 7 (RPC: Authentication error)

  - by automatthias

  I'm setting up an Ubuntu NFS server with a Solaris 10 client. The basic configuration looks okay to me, and it was also working for some time. I'm getting an "RPC: Authentication error" message on the client. server /etc/exports: /export/opencsw-future 192.168.3.0/24(rw,nohide,insecure,no_subtree_check,async) /export/opencsw-current 192.168.3.0/24(rw,nohide,insecure,no_subtree_check,async) $ ls -ld /export/opencsw-current drwxr-xr-x 7 maciej maciej 4096 2012-02-05 14:55 /export/opencsw-current client $ grep opencsw /etc/vfstab foosrv:/opencsw-current - /export/opencsw-current nfs - yes - $ sudo mount /export/opencsw-current NFS compound failed for server foosrv: error 7 (RPC: Authentication error) (...repeated...) nfs mount: mount: /export/opencsw-current: Permission denied My server host name resolves to both IPv4 and IPv6 addresses.

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• Tracing out going connections

  - by Tiffany Walker

  Jan 24 07:00:49 HOST kernel: [875997.380464] Firewall: *TCP_OUT Blocked* IN= OUT=eth0 SRC=108.60.11.15 DST=74.80.225.32 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=18789 DF PROTO=TCP SPT=64823 DPT=81 WINDOW=14600 RES=0x00 SYN URGP=0 Jan 24 07:00:50 HOST kernel: [875998.378321] Firewall: *TCP_OUT Blocked* IN= OUT=eth0 SRC=108.60.11.15 DST=74.80.225.32 LEN=52 TOS=0x00 PREC=0x00 TTL=64 ID=18790 DF PROTO=TCP SPT=64823 DPT=81 WINDOW=14600 RES=0x00 SYN URGP=0 I run fcgid so everything runs as a user. But is there a way to trace and figure out who is running an out going script? The sites all share the same IP so it's hard to know which site it is or where the script is located at.

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• The sound freezes while listening to music

  - by Scott

  I have bought an sound card - Sound Blaster X-FI Surround 5.1 PRO and while I'm listening to the music, after few minutes or even hours (it does happends randomly) the sound dissapears and I have to go settings: Playing Devices - Advanced and switch the Default Format (sampling frequency) and switch from the `16-bits, 48000 Hz (DVD Quality) to any other from the list (16-bits, 96000 Hz or 24-bits, 48000 Hz or 24-bits 96000 Hz). I have been trying to set all of the above options, but for all of them the sound freezes after listening to music. It is getting annoying and I hope its the settings fault and not my sound card. I got my drivers installed from the attached CD and I'm running Windows 7 HP 64 bits. If anyone would try to help me, I would really appreciate this.

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• Using sudo /etc/init.d/httpd start complains for log file rights

  - by SCO

  I created a custom log directory with the root account, and chmoded it to 777 teporarily. ls -la /var/mylogs/log/ total 16 drwxrwxrwx 2 root root 4096 Jun 24 06:27 . drwxr-xr-x 5 root root 4096 Jun 24 06:25 .. When I try to start the service from a user (lets say "myuser", which is in the sudoers files as myuser ALL=(ALL) ALL), it fails because of the permissions : sudo /etc/init.d/httpd start Starting httpd: (13)Permission denied: httpd: could not open error log file /var/mylogs/log/httpd_error.log. Unable to open logs However, the following is successfull : sudo bash /etc/init.d/http start So I guess these two methods are not equivalent, although to me doing sudo was the same than logging into the root account and issuing the commands. Any clue ? Thank you !

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• 'IPv6' Newbie with IPv6 address assigment

  - by Cute Puppy

  I am new to IP v6 and I am looking to translate some existing private IPv4 addresses into v6 address assignment. Can someone please help me to answer/explain the questions below? If I have an v4 address of: 10.10.0.0/22 10.10.1.0/22 10.10.2.0/22 10.10.3.0/22 10.10.8.0/20 10.20.1.0/24 What will the new v6 address to be? I have been looking online @ http://www.subnetonline.com/pages/subnet-calculators/ipv4-to-ipv6-converter.php or other sites, Seems like they translated it directly to be: fe80::a0a:0 /118 fe80::a0a:100 /118 fe80::a0a:200 /118 fe80::a0a:300 /118 fe80::a0a:800 /118 fe80::a14:100 /120 Can someone please explain to me how we get to /118 from either "/22 or /24" (1. and 5) In addition, I would like to create the new private address based on the Unique local address "fc00::/16" How do I expand from there? Any help is greatly appreciated it!! Thanks,

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• How Do I Enable CUPS Browsing Across A Network?

  - by David Mackintosh

  I have a CUPS server with two print queues defined. Once this was defined, all the CUPS clients on the same subnet could see the two print queues automatically, no problem. Now I have a collection of machines on a separate subnet, reachable from the first subnet by a router. How do I enable CUPS browsing on the second set of machines so that they can see the print queues defined on the first machine? Let's call the server A.B.C.7. The first subnet is A.B.C.0/24. The second subnet is A.B.D.0/24, and there is a router with arms on both networks.

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• Is this iptables NAT exploitable from the external side?

  - by Karma Fusebox

  Could you please have a short look on this simple iptables/NAT-Setup, I believe it has a fairly serious security issue (due to being too simple). On this network there is one internet-connected machine (running Debian Squeeze/2.6.32-5 with iptables 1.4.8) acting as NAT/Gateway for the handful of clients in 192.168/24. The machine has two NICs: eth0: internet-faced eth1: LAN-faced, 192.168.0.1, the default GW for 192.168/24 Routing table is two-NICs-default without manual changes: Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 (externalNet) 0.0.0.0 255.255.252.0 U 0 0 0 eth0 0.0.0.0 (externalGW) 0.0.0.0 UG 0 0 0 eth0 The NAT is then enabled only and merely by these actions, there are no more iptables rules: echo 1 > /proc/sys/net/ipv4/ip_forward /sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE # (all iptables policies are ACCEPT) This does the job, but I miss several things here which I believe could be a security issue: there is no restriction about allowed source interfaces or source networks at all there is no firewalling part such as: (set policies to DROP) /sbin/iptables -A FORWARD -i eth0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT /sbin/iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT And thus, the questions of my sleepless nights are: Is this NAT-service available to anyone in the world who sets this machine as his default gateway? I'd say yes it is, because there is nothing indicating that an incoming external connection (via eth0) should be handled any different than an incoming internal connection (via eth1) as long as the output-interface is eth0 - and routing-wise that holds true for both external und internal clients that want to access the internet. So if I am right, anyone could use this machine as open proxy by having his packets NATted here. So please tell me if that's right or why it is not. As a "hotfix" I have added a "-s 192.168.0.0/24" option to the NAT-starting command. I would like to know if not using this option was indeed a security issue or just irrelevant thanks to some mechanism I am not aware of. As the policies are all ACCEPT, there is currently no restriction on forwarding eth1 to eth0 (internal to external). But what are the effective implications of currently NOT having the restriction that only RELATED and ESTABLISHED states are forwarded from eth0 to eth1 (external to internal)? In other words, should I rather change the policies to DROP and apply the two "firewalling" rules I mentioned above or is the lack of them not affecting security? Thanks for clarification!

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• Triple monitor setup in linux

  - by Brendan Abel

  I'm hoping there are some xorg gurus out there. I'm trying to get a three monitor setup working in linux. I have 2 lcd monitors and a tv, all different resolutions. I'm using 2 video cards; a 9800 GTX and 7900Gt. I've seen a lot of different posts about people trying to make this work, and in every case, they either gave up, or Xinerama magically solved all their problems. Basically, my main problem is that I cannot get Xinerama to work. Every time I turn it on in the options, my machine gets stuck in a neverending boot cycle. If I disable Xinerama, I just have three Xorg screens, but I can't drag windows from one to the other. I can get the 2 lcds on Twinview, and the tv on a separate Xorg screen no problem. But I don't really like this solution. I'd rather have them all on separate screens and stitch them together with Xinerama. Has anyone done this? Here's my xorg.conf for reference. p.s. This took me all of 30 seconds to set up in Windows XP! p.s.s. I've seen somewhere that maybe randr can solve my problems? But I'm not quite sure how? Section "Monitor" Identifier "Main1" VendorName "Acer" ModelName "H233H" HorizSync 40-70 VertRefresh 60 Option "dpms" EndSection #Section "Monitor" # Identifier "Main2" # VendorName "Acer" # ModelName "AL2216W" # HorizSync 40-70 # VertRefresh 60 # Option "dpms" #EndSection Section "Monitor" Identifier "Projector" VendorName "BenQ" ModelName "W500" HorizSync 44.955-45 VertRefresh 59.94-60 Option "dpms" EndSection Section "Device" Identifier "Card1" Driver "nvidia" VendorName "nvidia" BusID "PCI:5:0:0" BoardName "nVidia Corporation G92 [GeForce 9800 GTX+]" Option "ConnectedMonitor" "DFP,DFP" Option "NvAGP" "0" Option "NoLogo" "True" #Option "TVStandard" "HD720p" EndSection Section "Device" Identifier "Card2" Driver "nvidia" VendorName "nvidia" BusID "PCI:4:0:0" BoardName "nVidia Corporation G71 [GeForce 7900 GT/GTO]" Option "NvAGP" "0" Option "NoLogo" "True" Option "TVStandard" "HD720p" EndSection Section "Module" Load "glx" EndSection Section "Screen" Identifier "ScreenMain-0" Device "Card1-0" Monitor "Main1" DefaultDepth 24 Option "Twinview" Option "TwinViewOrientation" "RightOf" Option "MetaModes" "DFP-0: 1920x1080; DFP-1: 1680x1050" Option "HorizSync" "DFP-0: 40-70; DFP-1: 40-70" Option "VertRefresh" "DFP-0: 60; DFP-1: 60" #SubSection "Display" # Depth 24 # Virtual 4880 1080 #EndSubSection EndSection Section "Screen" Identifier "ScreenProjector" Device "Card2" Monitor "Projector" DefaultDepth 24 Option "MetaModes" "TV-0: 1280x720" Option "HorizSync" "TV-0: 44.955-45" Option "VertRefresh" "TV-0: 59.94-60" EndSection Section "ServerLayout" Identifier "BothTwinView" Screen "ScreenMain-0" Screen "ScreenProjector" LeftOf "ScreenMain-0" #Option "Xinerama" "on" # most important option let you window expand to three monitors EndSection

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• routing problems

  - by user174050

  I have an windows 7 laptop and I have installed openvpn 2.2x as client. The laptop has 2 ethernet cards, one of them is wireless. The wireless lan is 192.168.1.0/24 The Fix lan is 192.168.2.0/24 If I connect to the openvpn server useing the Fix lan the I can connect properly and for testing I ping to my openvpn server 10.0.0.1 that answers correctly. But if I connect to the openvpn server useing the wireless lan, I can establish the connection but pinging to the server isn´t possible. The packets goes allways lost. Why can this happen? In an other laptop where windows xp is installed and with the same lan configuratio everything works propperly. In both cases the firewall is configured to access the vnc server and the server directories useing samba. With the XP I have no problems. I will thank you for all help Ignacio

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• outlook iptables configuration

  - by mediaexpert

  I've a Debian mail server, but only the outlook users can't be able to download the emails. I've seen a lot of post about some kind of forwarding port configuration, I've tried some commands, but I don't be able to solve this problem, please help me. below INPUT and FORWARD iptables: Chain INPUT (policy DROP 20 packets, 1016 bytes) pkts bytes target prot opt in out source destination 60833 16M ACCEPT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:143 state NEW,ESTABLISHED 18970 971K ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp spts:1024:65535 dpt:110 state NEW,ESTABLISHED Chain FORWARD (policy DROP 0 packets, 0 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT tcp -- * * 192.168.0.0/24 0.0.0.0/0 tcp dpt:110 0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 0 0 ACCEPT tcp -- * * 192.168.1.0/24 0.0.0.0/0 tcp dpt:110 0 0 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:25 0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:110

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• get all ip address from subnet mask

  - by Guntis

  I have this IP list shown below. How i can calculate all ip addresses from that in Linux? Is there some tools that can calculate that for me ? I need that to check if i have not banned some cloudflare IP's. As firewall i am using shorewall and i am banning with fail2ban single IP. As i know, then i cannot detect subent mask from IP adress, right? 204.93.240.0/24 204.93.177.0/24 199.27.128.0/21 173.245.48.0/20 103.22.200.0/22 141.101.64.0/18 108.162.192.0/18 190.93.240.0/20 188.114.96.0/20

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• What is good RAM for my CPU?

  - by Jason94

  I'm going to upgrade my RAM, but I have no clue what to look for. There is cheap and there is expensive RAM. What should I look for? What are good attributes for intel i5? The i5 CPU and motherboeard supports 1600 MHz (PC3-12800), but there is still to much to choose from. There are CL10 (10-10-10-27) @ 1.5V CL11 @ 1.35V CL9 (9-9-9-24) @ 1.5V CL9 (9-9-9-24) @ 1.65V Higher CL is better? CL is classification? And I guess a high voltage is also good since thats what overclockers do to the ram (increase the voltage)?

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• Unable to ping between subnets and out to internet

  - by battlemidget

  My setup is Modem - Linksys router - Laptop with 2 devices (wlan0/eth0) - desktop machine Router is 192.168.1.1 gateway to the internet Laptop wlan0 is 192.168.1.4 with a gw of 192.168.1.1 Laptop eth0 is 192.168.2.254 which acts as a second gateway desktop is 192.168.2.100 On laptop i've setup ip_forward to 1, and have inserted 2 iptables rules -A FORWARD -i eth0 -o wlan0 -j ACCEPT -A FORWARD -i wlan0 -o eth0 -j ACCEPT The laptop can ping outside the network (i,e, yahoo.com) it can not ping 192.168.2.100. The desktop can ping 192.168.2.254 but nothing outside the network or 192.168.1.0 subnet. On laptop ip route show lists: 192.168.2.0/24 dev eth0 proto kernel scope link src 192.168.2.254 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.4 127.0.0.0/8 dev lo scope link default via 192.168.1.1 dev wlan0 What am I missing to make my desktop go through the laptop in order to access the router which provides access to the internet? Thanks

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• nginx not returning 304 on cached content

  - by Don H

  I'm using nginx as a reverse proxy with an Apache back-end handling some PHP files. The files return the right expiry headers and proxy_cache does a good job of caching them, but I've noticed that the cached content returns a 200 on every refresh, when it might be more efficient to return a 304 on the cached files. The files in question are generated by PHP. The urls do not have .php in them as they've been prettified. Any idea why nginx might not be returning 304 on repeated visits to a cached PHP output? To clarify: It's using proxy_cache for caching dynamic PHP pages (not static html pages generated by PHP). I'm setting expires headers in the PHP file of time + 24 hours. With that in mind, I was hoping nginx would be able to then return 304s on its cached versions during that 24 hour window.

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• Remote access to internal machine (ssh port-forwarding)

  - by MacUsers

  I have a server (serv05) at work with a public ip, hosting two KVM guests - vtest1 & vtest2 - in two different private network - 192.168.122.0 & 192.168.100.0 - respectively, this way: [root@serv05 ~]# ip -o addr show | grep -w inet 1: lo inet 127.0.0.1/8 scope host lo 2: eth0 inet xxx.xxx.xx.197/24 brd xxx.xxx.xx.255 scope global eth0 4: virbr1 inet 192.168.100.1/24 brd 192.168.100.255 scope global virbr1 6: virbr0 inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 # [root@serv05 ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.100.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr1 xxx.xxx.xx.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth0 0.0.0.0 xxx.xxx.xx.62 0.0.0.0 UG 0 0 0 eth0 I've also setup IP FORWARDing and Masquerading this way: iptables --table nat --append POSTROUTING --out-interface eth0 -j MASQUERADE iptables --append FORWARD --in-interface virbr0 -j ACCEPT All works up to this point. If I want to remote access vtest1 (or vtest2) first I ssh to serv05 and then from there ssh to vtest1. Is there a way to setup a port forwarding so that vtest1 can be accessed directly from the outside world? This is what I probably need to setup: external_ip (tcp port 4444) -> DNAT -> 192.168.122.50 (tcp port 22) I know it's easily do'able using a SOHO router but can't figure out how can I do that on a Linux box. Any help form you guys?? Cheers!! Update: 1 Now I've made ssh to listen to both of the ports: [root@serv05 ssh]# netstat -tulpn | grep ssh tcp 0 0 xxx.xxx.xx.197:22 0.0.0.0:* LISTEN 5092/sshd tcp 0 0 xxx.xxx.xx.197:4444 0.0.0.0:* LISTEN 5092/sshd and port 4444 is allowed in the iptables rules: [root@serv05 sysconfig]# grep 4444 iptables -A PREROUTING -i eth0 -p tcp -m tcp --dport 4444 -j DNAT --to-destination 192.168.122.50:22 -A INPUT -p tcp -m state --state NEW -m tcp --dport 4444 -j ACCEPT -A FORWARD -i eth0 -p tcp -m tcp --dport 4444 -j ACCEPT But I'm getting connection refused: maci:~ santa$ telnet serv05 4444 Trying xxx.xxx.xx.197... telnet: connect to address xxx.xxx.xx.197: Connection refused telnet: Unable to connect to remote host Any idea what's I'm still missing? Cheers!!

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• Why is Windows 7 not following all routes?

  - by GigabyteProductions

  My computer is connected to my secondary router that's running the 192.168.42.0/24 network and my computer also has a route that directs anything on that network to the router, but for anything on that network other than the router itself, it get's the ICMP response of Reply from 192.168.42.194: Destination host unreachable. (with 192.168.42.194 being my computer). Every other network works, like all of the internet, or addresses on my primary router like 192.168.1.*, just not on the 192.168.42.0/24 network... route print returns: IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.42.1 192.168.42.194 276 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 192.168.42.0 255.255.255.0 On-link 192.168.42.194 276 192.168.42.194 255.255.255.255 On-link 192.168.42.194 276 192.168.42.255 255.255.255.255 On-link 192.168.42.194 276 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 192.168.42.194 276 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 192.168.42.194 276 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 0.0.0.0 0.0.0.0 192.168.42.1 Default =========================================================================== The only time anything is supposed to send an ICMP Host Unreachable response is when there's no route to it, right? So, why is my own computer sending that to ping or tracert when I have the route of 192.168.42.0 with the mask of 255.255.255.0? An IP address of 192.168.42.2 surely fits into that route. If I explicitly add a route for the IP address i am trying to access, it works, like: route add 192.168.42.2 mask 255.255.255.255 192.168.42.1 (the 192.168.42.1 right after mask is gateway, or the device to send the packet to so it can route it further), but why wont it work for the implicit route that's automatically on the table? I disabled my firewall, too (I use Comodo if anyone thinks this still serves as a problem). I'v even tried explicitly adding the gateway of 192.168.42.1 to the 192.168.42.0/24 route instead of it routing through 0.0.0.0's gateway, which is what On-link does. but that didn't work either, so it's not a gateway specification problem. If the host was really unreachable, it would be the router's IP address (192.168.42.1) sending that to me... This network is all of my creation, so there's no problem such as an administrator locking me out, because i am the administrator.

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• Possible HDD malfunction. Need help in diagnosing

  - by Protheus

  Today when using my PC as I did for almost 4 years I experienced the following: during opening new tab in Opera browser screen froze. Music (AIMP 3) continued to play for about 5 minutes and then stopped too. I tried Ctrl+Alt+Del, but win7 lock screen didn't appear. Caps\Scroll or Num locks didn't switch diodes on keyboard. I rebooted my PC and saw that BIOS suggests me to enter it's settings or load by default. I chose default. It don't see proper boot device (old faitful "insert proper boot" something). After second reboot it said that there is no ExpressGate installed (which i turned off in BIOS years ago). I went into BIOS setting to turn off ExpressGate and see configs: time was not set off, all hard drives present, temp and O.C. settings are nominal (no O.C.) I've inserted my Win7 install disk to try recovery. It did load awfully long (about few minutes) and didn't see current installation. PC was utilized in 24/7 mode for almost all these years. Hardware configuration: ASUS P5Q WS Core 2 Quad Q9300 (2.5GHz no O.C.) MSI geForce GTX 460 4x2 Gb GeIL EVO 2 (AFAIR) Seagate something 750Gb (4 years as system HDD 24/7) WD 1Tb (for random stuff, 5 y.o.) Hitachi 500Gb (for even more random stuff, 6 y.o.) NEC DVDRW (ALL DISKS ARE SATA) Cooler Master Silent Pro 700W Software: Windows 7 AND Kubuntu on the same drive with GRUB loader. Sorry I can't remember HDDs and can't see them right now, but I think their models aren't relevant anyway. My idea is that due to some system error or hard drive glitch i've wrecked my primary HDD's MBR. Nevertheless I don't exclude the possibility of other failure. May it's be that motherboard or it's SATA controller? Doubt it, because all drives are seen in BIOS and I could load from DVD. Maybe GRUB got bugged somehow, although I don't see how it's possible from Windows. But I did install KUbuntu from Windows (i wasn't myself then), maybe GRUB did write itself in some windows partition and got rewriteen in process? Right now I am at work with my flash drive with me and I need some advice how to fix MBR or to hear if it's not MBR. I'm going to buy new HDD (Hitachi 7k2000) because I think that my current HDD is compromised and it's unsafe to use it as system drive, especially 24/7.

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• wireless printer - entering WPA - is there a quicker way?

  - by camcam

  I have a wireless printer (Brother DCP-585CW). The wireless setup instruction says I should enter the WPA key to the printer. The key is entered using up and down buttons on the printer. So, I am supposed to enter 64 characters using up and down buttons. To enter 1 character, it takes on average (24+10)/2 = 17 times pressing the button (digits start after 24 letters). So 17*64 = 1088 times. Is there a quicker way to setup a wireless printer? Maybe there is a Windows program that discovers printers connected to computer through USB or Ethernet (my printer has both sockets) and allows to pre-configure it for wireless usage (enter the long WPA key)? Update There is BRAdmin program and it allows to set up almost all wireless settings... almost - all except WPA :(

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