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Hi, Have a nice day . I just get new Dell PowerEdge R720 come with RHEL Server 6.2. This server come with Network Daugther Card (NDC) 4 ports. I was ...
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  1. #1
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    Network Configuration on RHEL 6.2 Server problem


    Hi,

    Have a nice day .

    I just get new Dell PowerEdge R720 come with RHEL Server 6.2. This server come with Network Daugther Card (NDC) 4 ports.

    I was configured the network configuration with IP below:

    IP : 172.18.64.3
    Nmask : 255.255.252.0
    Gateway : 172.18.64.1

    The network cable for this server was connected via eth1 port to network switch.

    The problem I'm facing is:

    1. I can ping to other pc or workstation in the same network (LAN) but the other pc/workstation can't ping, ssh, ftp and http access to the server.

    Here is few method I had done :
    1. Disable / Enable RHEL Firewall. Didn't work.
    2. Disable / Enable Selinux. Didn't work also.
    3. Checking on ipv4.config configuration at /etc/sysctl.conf. all set as 0.
    4. Set the same IP on my notebook installed with apache server, and plug in the same network cable to my netbook. both way can ping. netbook can ping pc, and pc can ping and access apache server (http).
    5. Set IP in notebook with the same network range as server, connect the notebook to server via cross network cable. both way can ping and http access.
    6. use ifup and ifdown command at /etc/sysconfig/network-scripts/... still didn't work.

    I need help from experts here to resolve this problem. Before I post this topic, I was do searching in google and this forum, but did not see any related or same with this problem.

    Thank you.

  2. #2
    Just Joined! TheBoogyMaster's Avatar
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    Did you try this option ?

    Code:
    echo 0 >/proc/sys/net/ipv4/icmp_echo_ignore_all

  3. #3
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    Quote Originally Posted by TheBoogyMaster View Post
    Did you try this option ?

    Code:
    echo 0 >/proc/sys/net/ipv4/icmp_echo_ignore_all
    Tq for your response.

    I just try it... still same...

  4. #4
    Just Joined! TheBoogyMaster's Avatar
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    OK.

    Need some more information.
    How dis you install RHEL 6.2 ? Do you still have the anaconda.log in the /root directory ?

    Need the output of the folowing.

    Code:
    lspci
    Code:
    ls /etc/sysconfig/network-scripts/
    Code:
    cat /etc/sysconfig/network-scripts/ifcfg-ethX # the bzmber of your card.
    Code:
    ip a
    Code:
    cat /etc/sysconfig/network
    Code:
    ls /etc/udev/rules.d/
    edit : and these also :

    Code:
    # getenforce
    # cat /etc/sysconfig/iptables

  5. #5
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    [QUOTE=TheBoogyMaster;918200]OK.

    Need some more information.
    How dis you install RHEL 6.2 ? Do you still have the anaconda.log in the /root directory ?

    Need the output of the folowing.

    Code:
    lspci
    [root@metweb2 ~]# lspci
    00:00.0 Host bridge: Intel Corporation Sandy Bridge DMI2 (rev 07)
    00:01.0 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 1a (rev 07)
    00:01.1 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 1b (rev 07)
    00:02.0 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 2a (rev 07)
    00:02.2 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 2c (rev 07)
    00:03.0 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 3a in PCI Express Mode (rev 07)
    00:03.2 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 3c (rev 07)
    00:05.0 System peripheral: Intel Corporation Sandy Bridge Address Map, VTd_Misc, System Management (rev 07)
    00:05.2 System peripheral: Intel Corporation Sandy Bridge Control Status and Global Errors (rev 07)
    00:11.0 PCI bridge: Intel Corporation Patsburg PCI Express Virtual Root Port (rev 05)
    00:16.0 Communication controller: Intel Corporation Patsburg MEI Controller #1 (rev 05)
    00:16.1 Communication controller: Intel Corporation Patsburg MEI Controller #2 (rev 05)
    00:1a.0 USB controller: Intel Corporation Patsburg USB2 Enhanced Host Controller #2 (rev 05)
    00:1c.0 PCI bridge: Intel Corporation Patsburg PCI Express Root Port 1 (rev b5)
    00:1c.7 PCI bridge: Intel Corporation Patsburg PCI Express Root Port 8 (rev b5)
    00:1d.0 USB controller: Intel Corporation Patsburg USB2 Enhanced Host Controller #1 (rev 05)
    00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a5)
    00:1f.0 ISA bridge: Intel Corporation Patsburg LPC Controller (rev 05)
    00:1f.2 SATA controller: Intel Corporation Patsburg 6-Port SATA AHCI Controller (rev 05)
    01:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
    01:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
    02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
    02:00.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
    03:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2208 [Thunderbolt] (rev 01)
    09:00.0 PCI bridge: Renesas Technology Corp. SH7757 PCIe Switch [PS]
    0a:00.0 PCI bridge: Renesas Technology Corp. SH7757 PCIe Switch [PS]
    0a:01.0 PCI bridge: Renesas Technology Corp. SH7757 PCIe Switch [PS]
    0b:00.0 PCI bridge: Renesas Technology Corp. SH7757 PCIe-PCI Bridge [PPB]
    0c:00.0 VGA compatible controller: Matrox Graphics, Inc. G200eR2
    3f:08.0 System peripheral: Intel Corporation Sandy Bridge QPI Link 0 (rev 07)
    3f:09.0 System peripheral: Intel Corporation Sandy Bridge QPI Link 1 (rev 07)
    3f:0a.0 System peripheral: Intel Corporation Sandy Bridge Power Control Unit 0 (rev 07)
    3f:0a.1 System peripheral: Intel Corporation Sandy Bridge Power Control Unit 1 (rev 07)
    3f:0a.2 System peripheral: Intel Corporation Sandy Bridge Power Control Unit 2 (rev 07)
    3f:0a.3 System peripheral: Intel Corporation Sandy Bridge Power Control Unit 3 (rev 07)
    3f:0b.0 System peripheral: Intel Corporation Sandy Bridge Interrupt Control Registers (rev 07)
    3f:0b.3 System peripheral: Intel Corporation Sandy Bridge Semaphore and Scratchpad Configuration Registers (rev 07)
    3f:0c.0 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    3f:0c.1 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    3f:0c.2 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    3f:0c.6 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller System Address Decoder 0 (rev 07)
    3f:0c.7 System peripheral: Intel Corporation Sandy Bridge System Address Decoder (rev 07)
    3f:0d.0 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    3f:0d.1 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    3f:0d.2 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    3f:0d.6 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller System Address Decoder 1 (rev 07)
    3f:0e.0 System peripheral: Intel Corporation Sandy Bridge Processor Home Agent (rev 07)
    3f:0e.1 Performance counters: Intel Corporation Sandy Bridge Processor Home Agent Performance Monitoring (rev 07)
    3f:0f.0 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Registers (rev 07)
    3f:0f.1 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller RAS Registers (rev 07)
    3f:0f.2 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 0 (rev 07)
    3f:0f.3 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 1 (rev 07)
    3f:0f.4 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 2 (rev 07)
    3f:0f.5 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 3 (rev 07)
    3f:0f.6 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 4 (rev 07)
    3f:10.0 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Channel 0-3 Thermal Control 0 (rev 07)
    3f:10.1 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Channel 0-3 Thermal Control 1 (rev 07)
    3f:10.2 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller ERROR Registers 0 (rev 07)
    3f:10.3 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller ERROR Registers 1 (rev 07)
    3f:10.4 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Channel 0-3 Thermal Control 2 (rev 07)
    3f:10.5 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Channel 0-3 Thermal Control 3 (rev 07)
    3f:10.6 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller ERROR Registers 2 (rev 07)
    3f:10.7 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller ERROR Registers 3 (rev 07)
    3f:11.0 System peripheral: Intel Corporation Sandy Bridge DDRIO (rev 07)
    3f:13.0 System peripheral: Intel Corporation Sandy Bridge R2PCIe (rev 07)
    3f:13.1 Performance counters: Intel Corporation Sandy Bridge Ring to PCI Express Performance Monitor (rev 07)
    3f:13.4 Performance counters: Intel Corporation Sandy Bridge QuickPath Interconnect Agent Ring Registers (rev 07)
    3f:13.5 Performance counters: Intel Corporation Sandy Bridge Ring to QuickPath Interconnect Link 0 Performance Monitor (rev 07)
    3f:13.6 System peripheral: Intel Corporation Sandy Bridge Ring to QuickPath Interconnect Link 1 Performance Monitor (rev 07)
    40:01.0 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 1a (rev 07)
    40:02.0 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 2a (rev 07)
    40:03.0 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 3a in PCI Express Mode (rev 07)
    40:03.2 PCI bridge: Intel Corporation Sandy Bridge IIO PCI Express Root Port 3c (rev 07)
    40:05.0 System peripheral: Intel Corporation Sandy Bridge Address Map, VTd_Misc, System Management (rev 07)
    40:05.2 System peripheral: Intel Corporation Sandy Bridge Control Status and Global Errors (rev 07)
    7f:08.0 System peripheral: Intel Corporation Sandy Bridge QPI Link 0 (rev 07)
    7f:09.0 System peripheral: Intel Corporation Sandy Bridge QPI Link 1 (rev 07)
    7f:0a.0 System peripheral: Intel Corporation Sandy Bridge Power Control Unit 0 (rev 07)
    7f:0a.1 System peripheral: Intel Corporation Sandy Bridge Power Control Unit 1 (rev 07)
    7f:0a.2 System peripheral: Intel Corporation Sandy Bridge Power Control Unit 2 (rev 07)
    7f:0a.3 System peripheral: Intel Corporation Sandy Bridge Power Control Unit 3 (rev 07)
    7f:0b.0 System peripheral: Intel Corporation Sandy Bridge Interrupt Control Registers (rev 07)
    7f:0b.3 System peripheral: Intel Corporation Sandy Bridge Semaphore and Scratchpad Configuration Registers (rev 07)
    7f:0c.0 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    7f:0c.1 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    7f:0c.2 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    7f:0c.6 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller System Address Decoder 0 (rev 07)
    7f:0c.7 System peripheral: Intel Corporation Sandy Bridge System Address Decoder (rev 07)
    7f:0d.0 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    7f:0d.1 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    7f:0d.2 System peripheral: Intel Corporation Sandy Bridge Unicast Register 0 (rev 07)
    7f:0d.6 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller System Address Decoder 1 (rev 07)
    7f:0e.0 System peripheral: Intel Corporation Sandy Bridge Processor Home Agent (rev 07)
    7f:0e.1 Performance counters: Intel Corporation Sandy Bridge Processor Home Agent Performance Monitoring (rev 07)
    7f:0f.0 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Registers (rev 07)
    7f:0f.1 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller RAS Registers (rev 07)
    7f:0f.2 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 0 (rev 07)
    7f:0f.3 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 1 (rev 07)
    7f:0f.4 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 2 (rev 07)
    7f:0f.5 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 3 (rev 07)
    7f:0f.6 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Target Address Decoder 4 (rev 07)
    7f:10.0 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Channel 0-3 Thermal Control 0 (rev 07)
    7f:10.1 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Channel 0-3 Thermal Control 1 (rev 07)
    7f:10.2 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller ERROR Registers 0 (rev 07)
    7f:10.3 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller ERROR Registers 1 (rev 07)
    7f:10.4 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Channel 0-3 Thermal Control 2 (rev 07)
    7f:10.5 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller Channel 0-3 Thermal Control 3 (rev 07)
    7f:10.6 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller ERROR Registers 2 (rev 07)
    7f:10.7 System peripheral: Intel Corporation Sandy Bridge Integrated Memory Controller ERROR Registers 3 (rev 07)
    7f:11.0 System peripheral: Intel Corporation Sandy Bridge DDRIO (rev 07)
    7f:13.0 System peripheral: Intel Corporation Sandy Bridge R2PCIe (rev 07)
    7f:13.1 Performance counters: Intel Corporation Sandy Bridge Ring to PCI Express Performance Monitor (rev 07)
    7f:13.4 Performance counters: Intel Corporation Sandy Bridge QuickPath Interconnect Agent Ring Registers (rev 07)
    7f:13.5 Performance counters: Intel Corporation Sandy Bridge Ring to QuickPath Interconnect Link 0 Performance Monitor (rev 07)
    7f:13.6 System peripheral: Intel Corporation Sandy Bridge Ring to QuickPath Interconnect Link 1 Performance Monitor (rev 07)

    Code:
    ls /etc/sysconfig/network-scripts/
    [root@metweb2 ~]# ls /etc/sysconfig//network-scripts/
    ifcfg-em1network1 ifcfg-em4network4 ifdown-bnep ifdown-isdn ifdown-sit ifup-bnep ifup-isdn ifup-ppp ifup-wireless network-functions-ipv6
    ifcfg-em1network1.ori ifcfg-lo ifdown-eth ifdown-post ifdown-tunnel ifup-eth ifup-plip ifup-routes init.ipv6-global
    ifcfg-em2network2 ifcfg-lo.ori ifdown-ippp ifdown-ppp ifup ifup-ippp ifup-plusb ifup-sit net.hotplug
    ifcfg-em3network3 ifdown ifdown-ipv6 ifdown-routes ifup-aliases ifup-ipv6 ifup-post ifup-tunnel network-functions

    Code:
    cat /etc/sysconfig/network-scripts/ifcfg-ethX # the bzmber of your card.
    [root@metweb2 ~]# cat /etc/sysconfig/network-scripts/ifcfg-em1network1
    DEVICE=eth1
    HWADDR=e0:db:55:0f:78:fc
    NM_CONTROLLED=yes
    ONBOOT=yes
    BOOTPROTO=none
    TYPE=Ethernet
    IPV6INIT=no
    USERCTL=no
    DNS2=8.8.8.8
    DNS1=203.121.16.85
    IPADDR=172.18.64.3
    NETMASK=255.255.252.0
    GATEWAY=172.18.64.1
    ETHTOOL_OPTS="speed 100o duplex full autoneg off"


    Code:
    ip a
    [root@metweb2 ~]# ip a
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet 172.18.64.3/22 brd 127.255.255.255 scope host lo
    2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether e0:db:55:0f:78:fc brd ff:ff:ff:ff:ff:ff
    inet 172.18.64.3/22 brd 172.18.67.255 scope global eth1
    3: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether e0:db:55:0f:78:fd brd ff:ff:ff:ff:ff:ff
    4: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether e0:db:55:0f:78:fe brd ff:ff:ff:ff:ff:ff
    5: em4eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether e0:db:55:0f:78:ff brd ff:ff:ff:ff:ff:ff


    Code:
    cat /etc/sysconfig/network
    [root@metweb2 ~]# cat /etc/sysconfig/network
    NETWORKING=yes
    #HOSTNAME=localhost.localdomain
    HOSTNAME=metweb2
    NTPSERVERARGS=iburst


    Code:
    ls /etc/udev/rules.d/
    [root@metweb2 ~]# ls /etc/udev/rules.d/
    60-fprint-autosuspend.rules 60-raw.rules 70-persistent-net.rules 90-hal.rules 97-bluetooth-serial.rules 99-fuse.rules
    60-pcmcia.rules 70-persistent-cd.rules 90-alsa.rules 91-drm-modeset.rules 98-kexec.rules

    edit : and these also :

    Code:
    # getenforce
    # cat /etc/sysconfig/iptables
    [root@metweb2 ~]# getenforce
    Disabled
    [root@metweb2 ~]# cat /etc/sysconfig/iptables
    # Firewall configuration written by system-config-firewall
    # Manual customization of this file is not recommended.
    *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 -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 INPUT -m state --state NEW -m tcp -p tcp --dport 21 -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 22 -j ACCEPT
    -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
    -A INPUT -j REJECT --reject-with icmp-host-prohibited
    -A FORWARD -j REJECT --reject-with icmp-host-prohibited
    COMMIT

  6. #6
    Linux Newbie
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    You mean you can do ping one direction and from other side ping or any connections not working Right ?
    Why dont u try basic test of traceroute from other PC to the server ?

  7. #7
    Just Joined! TheBoogyMaster's Avatar
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    OK. Your network card is configured correctly from what I can see and you have the needed port open on the firewall and that you allow icmp requests. But when I do firewall rules I like to be more specificaly and I add this for the icmp part

    Code:
    # Ping in and out
    -A INPUT  -p icmp -m icmp --icmp-type echo-request -j ACCEPT
    -A INPUT  -p icmp -m icmp --icmp-type echo-reply   -j ACCEPT
    Try this and let me know if it works.
    If I understand well you have network acess with the server but it can't be accessed from other pcs or workstations ?! Is that correct ?

    PS: For your network card if you want to rename it like old style ethX you can change the /etc/udev/rules.d/70-persistent-net.rules where the udev configuration is hardnaming your network card by it's mac adress.

  8. #8
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    Quote Originally Posted by NixSavy View Post
    You mean you can do ping one direction and from other side ping or any connections not working Right ?
    Why dont u try basic test of traceroute from other PC to the server ?
    hi nix,

    yes, i only can ping 1 direction only. server can ping out... but other pc in the networkk can't ping server. how can i do traceroute when i can't ping...?

  9. #9
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    Quote Originally Posted by TheBoogyMaster View Post
    OK. Your network card is configured correctly from what I can see and you have the needed port open on the firewall and that you allow icmp requests. But when I do firewall rules I like to be more specificaly and I add this for the icmp part

    Code:
    # Ping in and out
    -A INPUT  -p icmp -m icmp --icmp-type echo-request -j ACCEPT
    -A INPUT  -p icmp -m icmp --icmp-type echo-reply   -j ACCEPT
    Try this and let me know if it works.
    If I understand well you have network acess with the server but it can't be accessed from other pcs or workstations ?! Is that correct ?

    PS: For your network card if you want to rename it like old style ethX you can change the /etc/udev/rules.d/70-persistent-net.rules where the udev configuration is hardnaming your network card by it's mac adress.
    Yes, correct.

    I will response to this thread on wednesday, because of malaysia has public holiday till tuesday.. thanks for your advice friend.

  10. #10
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    run the traceroute <server ip> and also check logs if iptables rejects icmp protocol.
    since ping didnot work, traceroute will not succeed. But it tells where connection breaks
    paste the output here

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