Results 1 to 8 of 8

Thread: Can not connect to devices on LAN. WAN connections are working normally.

  1. #1
    Join Date
    Oct 2008
    Beans
    5

    Can not connect to devices on LAN. WAN connections are working normally.

    I can get out to the internet just fine, but I can not ping, SMB, RDP, or VNC to anything on my local LAN. I've been having a lot of trouble with my network connections since upgrading to 8.10 and I suspect I screwed something up in my attempts at fixing those problems.

    Current routing table:
    bgarneau@bgarneau-laptop:~$ route
    Kernel IP routing table
    Destination Gateway Genmask Flags Metric Ref Use Iface
    192.168.254.0 * 255.255.255.0 U 0 0 0 eth0
    default 192.168.254.254 0.0.0.0 UG 0 0 0 eth0


    192.168.254.0 is the correct network but I am getting destination unreachable trying to ping any device on this network.

  2. #2
    Join Date
    Aug 2008
    Beans
    488

    Re: Can not connect to devices on LAN. WAN connections are working normally.

    routing table looks short and fine. not much wrong there. I bet it's a firewall thing, take a look at shorewall, or directly to the netfilter

    iptables -L -v

    Otherwise you might want to make some network traces, to see which packets go out, and which come in.
    tcpdump -i eth0 -s 1600 -v

    goodluck

  3. #3
    Join Date
    Jan 2007
    Location
    West Coast
    Beans
    69
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Can not connect to devices on LAN. WAN connections are working normally.

    I'm having the exact same issue. I can't ping, ssh, ftp, telnet, nothing in or out of any computer on my network, to each other. Outgoing works just fine, to anything outside my network, But inside my network, it's all dead.

    Please, if you find an answer to this problem, email me at rkclads AT gmail.com

    Thank you

  4. #4
    Join Date
    Oct 2008
    Beans
    5

    Re: Can not connect to devices on LAN. WAN connections are working normally.

    ding ding. Disabled moblock and everything is well again.

  5. #5
    Join Date
    Jan 2007
    Location
    West Coast
    Beans
    69
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Can not connect to devices on LAN. WAN connections are working normally.

    Damn. I don't believe I have moblock installed. I checked, couldn't find any service or package. I can ping my Ubuntu boxes from a WINDOWS machine no problem. I can't ping anything from within my LAN from my Ubuntu boxes though. I can ping my router, and my webserver and whatnot just fine.


    Anyone have any suggestions?

  6. #6
    Join Date
    Nov 2008
    Beans
    1

    Re: Can not connect to devices on LAN. WAN connections are working normally.

    i have the same problem

    can use the net just fine, can ping my router, my xp box can ping my intrepid box, but interpid can't ping xp


    anyone manage to solve this?

  7. #7
    Join Date
    Feb 2009
    Beans
    8

    Re: Can not connect to devices on LAN. WAN connections are working normally.

    Has anyone found a solution to this problem? This has been happening to me for about 2 weeks now. The computer will respond fine for about an hour, before it disappears off the network.

    Internet works fine, and I'm still able to see the computer from the router (WRT54G w/ Tomato 1.25), but nothing is able to connect to computer from the LAN.

    edit: Now here is the strange thing. I am not able to ping the computer from other devices on the network, but when I do a ping with the computer to other devices it works just fine. It's only when I want to connect to the computer that it doesn't work.
    Last edited by IrishWristwatch; June 19th, 2009 at 04:19 AM.

  8. #8
    Join Date
    Oct 2009
    Beans
    1

    Re: Can not connect to devices on LAN. WAN connections are working normally.

    I have somewhat of the same issue. My network is 172.31.12.0/24 working over eth1 which has an assigned address of 172.31.12.160 and is a wireless connection. I don't have a wired connection. My gateway router is 172.31.12.1. I can ping 2 out of 7 devices on the network. All other pinged devices respond with 'No route to host'. I have gone to each device on the network and pinged the other existing devices and there are no issues. It is only my ubuntu 9.10 device. BTW, I've had this issue since 9.04 and thought that 9.10 would fix it. No such luck. Here's my config:

    kds@radio:~$ ifconfig eth1
    eth1 Link encap:Ethernet HWaddr 00:03:23:62:3b:ef
    inet addr:172.31.12.160 Bcast:172.31.12.255 Mask:255.255.255.0


    kds@radio:~$ ip route
    172.31.12.0/24 dev eth1 proto kernel scope link src 172.31.12.160 metric 2
    default via 172.31.12.1 dev eth1 proto static

    2 other linux boxes, one running RHEL4 and the other RHEL5. Both have the same exact listing for the ip route command except for the ip address assigned to the box. Also, have another laptop running ubuntu 9.04 with wired interface only. It does not have any issues.

    kds/WY5R

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •