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Thread: Router becomes inaccessible after attaching WAN cable

  1. #1

    Router becomes inaccessible after attaching WAN cable

    Have anybody faced this prob, how to solve it?

    I have wl-500g with installed Oleg's firmware (release 5a). For some testing purposes (to check what's visible outside) i have turned off firewall. After that router became inaccessible from anywhere. Some experiments gave a possibility to connect it: with WAN detached (I have PPTP connection). Firewall turned on back successfully, but immediatelly after connecting cable it stops beign accessible. I presume there are some changes with routing tables but do not have enough experience to check. what's the place of firewall in whole chain? internet -- firewall -- routing -- lan - is it correct?

    What can I do to make the box work? (do not want to reinstall completely)

  2. #2
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    If you want for someone to answer a question, then you should post all meaning config info, including IP address, etc.

  3. #3
    Router settings are

    [tim@(none) root]$ ifconfig
    br0 Link encap:Ethernet HWaddr 00:118:60:1F:96
    inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0
    inet6 addr: fe80::211:d8ff:fe60:1f96/10 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:486 errors:0 dropped:0 overruns:0 frame:0
    TX packets:220 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:24338 (23.7 KiB) TX bytes:18320 (17.8 KiB)

    eth0 Link encap:Ethernet HWaddr 00:118:60:1F:96
    inet6 addr: fe80::211:d8ff:fe60:1f96/10 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:0 errors:0 dropped:0 overruns:0 frame:0
    TX packets:129 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:100
    RX bytes:0 (0.0 B) TX bytes:9058 (8.8 KiB)
    Interrupt:3 Base address:0x2000

    eth1 Link encap:Ethernet HWaddr 00:0D:60:7B:10:C1
    inet addr:10.60.30.33 Bcast:10.60.30.255 Mask:255.255.255.0
    inet6 addr: fe80::20d:60ff:fe7b:10c1/10 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:103 errors:0 dropped:0 overruns:0 frame:0
    TX packets:274 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:100
    RX bytes:8030 (7.8 KiB) TX bytes:20380 (19.9 KiB)
    Interrupt:4 Base address:0x8000

    eth2 Link encap:Ethernet HWaddr 00:118:60:1F:96
    inet6 addr: fe80::211:d8ff:fe60:1f96/10 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:481 errors:0 dropped:0 overruns:0 frame:8
    TX packets:299 errors:7 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:100
    RX bytes:30631 (29.9 KiB) TX bytes:27468 (26.8 KiB)
    Interrupt:6 Base address:0x2000

    lo Link encap:Local Loopback
    inet addr:127.0.0.1 Mask:255.0.0.0
    inet6 addr: ::1/128 Scope:Host
    UP LOOPBACK RUNNING MULTICAST MTU:16436 Metric:1
    RX packets:174 errors:0 dropped:0 overruns:0 frame:0
    TX packets:174 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:15332 (14.9 KiB) TX bytes:15332 (14.9 KiB)

    ppp0 Link encap:Point-Point Protocol
    inet addr:212.45.14.74 P-t-P:10.60.11.1 Mask:255.255.255.255
    UP POINTOPOINT RUNNING MULTICAST MTU:1492 Metric:1
    RX packets:25 errors:0 dropped:0 overruns:0 frame:0
    TX packets:243 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:3
    RX bytes:950 (950.0 B) TX bytes:13953 (13.6 KiB)


    [tim@(none) root]$ iptables -L
    Chain INPUT (policy ACCEPT)
    target prot opt source destination
    logdrop all -- anywhere anywhere state INVALID
    logaccept all -- anywhere anywhere state RELATED,ESTAB
    ACCEPT all -- anywhere anywhere state NEW
    ACCEPT all -- anywhere anywhere state NEW
    logaccept tcp -- anywhere anywhere tcp dpt:www
    logaccept tcp -- anywhere anywhere tcp dpt:ftp
    logaccept icmp -- anywhere anywhere
    logdrop all -- anywhere anywhere

    Chain FORWARD (policy ACCEPT)
    target prot opt source destination
    logaccept all -- anywhere anywhere state RELATED,ESTAB
    logdrop all -- anywhere anywhere state INVALID
    logaccept all -- anywhere anywhere
    TCPMSS tcp -- anywhere anywhere tcp flags:SYN,RST/S
    logaccept tcp -- anywhere anywhere tcp flags:SYN,RST,A
    logaccept tcp -- anywhere anywhere tcp flags:FIN,SYN,R
    logaccept icmp -- anywhere anywhere limit: avg 1/sec bu
    logaccept tcp -- anywhere 192.168.0.33 tcp dpt:3389

    Chain OUTPUT (policy ACCEPT)
    target prot opt source destination

    Chain MACS (0 references)
    target prot opt source destination

    Chain logaccept (10 references)
    target prot opt source destination
    LOG all -- anywhere anywhere state NEW LOG level
    ACCEPT all -- anywhere anywhere

    Chain logdrop (3 references)
    target prot opt source destination
    LOG all -- anywhere anywhere state NEW LOG level
    DROP all -- anywhere anywhere


    Pls advise what is wrong and what's the procedure to fix the thing?

  4. #4
    Join Date
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    Do you've post-firewall script? If so disable it.
    Also disable LAN to WAN filter on the config pages.

  5. #5
    I've performed installation from factory defaults and now it works. Oleg, what goes first - firewall or routing procedure? Is it correct that forewall = certain iptables settings?

  6. #6
    Join Date
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    Location
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    Quote Originally Posted by tim
    Oleg, what goes first - firewall or routing procedure?
    Never checked this.
    Is it correct that forewall = certain iptables settings?
    Yes.

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