Cisco 804 Question about line staying up

Discussion in 'Cisco' started by TKM, Oct 27, 2003.

  1. TKM

    TKM Guest

    I have an 804 and it has been working fine. However, I recently
    switched ISPs and have noticed a problem.

    It appears that my box is being "pinged/accessed" quite frequently by
    machines from outside. I am running NAT, so nothing is getting
    through, but the activity is keeping the line up.

    How would I set up a filter that would ignore this traffic when coming
    unrequested from the other side as valid line activity for the idle
    timer?

    Also, here is some lines from "debug ip". Am I correct in my
    assessment of what this traffic is? (I masked my box's assigned ip
    address, and this is a small sample.)

    6d01h: IP: s=67.27.117.109 (BRI0), d=xxx.xxx.xxx.xxx (BRI0), len 92,
    rcvd 3
    6d01h: IP: s=xxx.xxx.xxx.xxx (local), d=67.27.117.109 (BRI0), len 92,
    sending
    6d01h: IP: s=209.178.129.63 (BRI0), d=xxx.xxx.xxx.xxx (BRI0), len 574,
    rcvd 3
    6d01h: IP: s=xxx.xxx.xxx.xxx (local), d=209.178.129.63 (BRI0), len 56,
    sending
    6d01h: IP: s=209.178.129.63 (BRI0), d=xxx.xxx.xxx.xxx (BRI0), len 574,
    rcvd 3
    6d01h: IP: s=67.28.98.149 (BRI0), d=xxx.xxx.xxx.xxx (BRI0), len 92,
    rcvd 3
    6d01h: IP: s=xxx.xxx.xxx.xxx (local), d=67.28.98.149 (BRI0), len 92,
    sending
    6d01h: IP: s=67.28.98.149 (BRI0), d=xxx.xxx.xxx.xxx (BRI0), len 48,
    rcvd 3
    6d01h: tcp0: I LISTEN 67.28.98.149:4279 xxx.xxx.xxx.xxx:135 seq
    1879181675
    OPTS 8 SYN WIN 8760
    6d01h: IP: s=xxx.xxx.xxx.xxx (local), d=67.28.98.149 (BRI0), len 40,
    sending
    6d01h: IP: s=67.28.98.149 (BRI0), d=xxx.xxx.xxx.xxx (BRI0), len 48,
    rcvd 3
    6d01h: tcp0: I LISTEN 67.28.98.149:4279 xxx.xxx.xxx.xxx:135 seq
    1879181675
    OPTS 8 SYN WIN 8760
    6d01h: IP: s=xxx.xxx.xxx.xxx (local), d=67.28.98.149 (BRI0), len 40,
    sending
    6d01h: IP: s=67.28.98.149 (BRI0), d=xxx.xxx.xxx.xxx (BRI0), len 48,
    rcvd 3
    6d01h: tcp0: I LISTEN 67.28.98.149:4279 xxx.xxx.xxx.xxx:135 seq
    1879181675
    OPTS 8 SYN WIN 8760
    6d01h: IP: s=xxx.xxx.xxx.xxx (local), d=67.28.98.149 (BRI0), len 40,
    sending


    Thank you for any help and pointers.
     
    TKM, Oct 27, 2003
    #1
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  2. TKM

    Ivan Ostres Guest

    "TKM" <> wrote in message
    news:...
    > I have an 804 and it has been working fine. However, I recently
    > switched ISPs and have noticed a problem.
    >
    > It appears that my box is being "pinged/accessed" quite frequently by
    > machines from outside. I am running NAT, so nothing is getting
    > through, but the activity is keeping the line up.
    >
    > How would I set up a filter that would ignore this traffic when coming
    > unrequested from the other side as valid line activity for the idle
    > timer?
    >
    > Also, here is some lines from "debug ip". Am I correct in my
    > assessment of what this traffic is? (I masked my box's assigned ip
    > address, and this is a small sample.)
    >

    [cut]

    Summary: pings, and connections to port 135... viruses still active. Deny
    that incoming traffic and you should be ok.

    Ivan
     
    Ivan Ostres, Oct 27, 2003
    #2
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