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09.03.2008 at 02:09PM PDT, ID: 23700799
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7.8

Denial of service attacks/faulty hardware?

Asked by bmilne1957 in Internet Control Message Protocol (ICMP), Miscellaneous Hardware, Networking Hardware

Tags:

The network I support has been going up and down about once a week, I just ran Wireshark and it records activity  between a Netopia Router and a SBS 2003 R2 server. Intermitantly I can not access the Router from the server. Wireshark dispaying the information below one right after another; at times the traffic stops and what I woudl call normal traffic is present. A detailed code snippit is attached as well as a longer record of the snippit in a text document
1      0.000000      192.168.1.1      192.168.1.2      Syslog      LOCAL0.INFO: Sep 03 14:43:46 Netopia-3000/23620308 2008 protocol:TCP srcIP:  192.168.1.113 dstIP: 207.97.206.124 srcPort: 3578 dstPort:  443 attempt
2      0.000032      192.168.1.2      192.168.1.1      ICMP      Destination unreachable (Port unreachable) Start Free Trial 
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No.     Time        Source                Destination           Protocol Info
      1 0.000000    192.168.1.1           192.168.1.2           Syslog   LOCAL0.INFO: Sep 03 14:43:46 Netopia-3000/23620308 2008 protocol:TCP srcIP:  192.168.1.113 dstIP: 207.97.206.124 srcPort: 3578 dstPort:  443 attempt
 
Frame 1 (182 bytes on wire, 182 bytes captured)
Ethernet II, Src: Netopia_68:6a:d4 (00:0f:cc:68:6a:d4), Dst: IntelCor_40:fb:34 (00:15:17:40:fb:34)
    Destination: IntelCor_40:fb:34 (00:15:17:40:fb:34)
        Address: IntelCor_40:fb:34 (00:15:17:40:fb:34)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Source: Netopia_68:6a:d4 (00:0f:cc:68:6a:d4)
        Address: Netopia_68:6a:d4 (00:0f:cc:68:6a:d4)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Type: IP (0x0800)
Internet Protocol, Src: 192.168.1.1 (192.168.1.1), Dst: 192.168.1.2 (192.168.1.2)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..0. = ECN-Capable Transport (ECT): 0
        .... ...0 = ECN-CE: 0
    Total Length: 168
    Identification: 0x4d97 (19863)
    Flags: 0x00
        0... = Reserved bit: Not set
        .0.. = Don't fragment: Not set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 255
    Protocol: UDP (0x11)
    Header checksum: 0xea59 [correct]
        [Good: True]
        [Bad : False]
    Source: 192.168.1.1 (192.168.1.1)
    Destination: 192.168.1.2 (192.168.1.2)
User Datagram Protocol, Src Port: syslog (514), Dst Port: syslog (514)
    Source port: syslog (514)
    Destination port: syslog (514)
    Length: 148
    Checksum: 0x9fad [correct]
        [Good Checksum: True]
        [Bad Checksum: False]
Syslog message: LOCAL0.INFO: Sep 03 14:43:46 Netopia-3000/23620308 2008 protocol:TCP srcIP:  192.168.1.113 dstIP: 207.97.206.124 srcPort: 3578 dstPort:  443 attempt
    1000 0... = Facility: LOCAL0 - reserved for local use (16)
    .... .110 = Level: INFO - informational (6)
    Message: Sep 03 14:43:46 Netopia-3000/23620308 2008 protocol:TCP srcIP:  192.168.1.113 dstIP: 207.97.206.124 srcPort: 3578 dstPort:  443 attempt
 
No.     Time        Source                Destination           Protocol Info
      2 0.000032    192.168.1.2           192.168.1.1           ICMP     Destination unreachable (Port unreachable)
 
Frame 2 (190 bytes on wire, 190 bytes captured)
Ethernet II, Src: IntelCor_40:fb:34 (00:15:17:40:fb:34), Dst: Netopia_68:6a:d4 (00:0f:cc:68:6a:d4)
    Destination: Netopia_68:6a:d4 (00:0f:cc:68:6a:d4)
        Address: Netopia_68:6a:d4 (00:0f:cc:68:6a:d4)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Source: IntelCor_40:fb:34 (00:15:17:40:fb:34)
        Address: IntelCor_40:fb:34 (00:15:17:40:fb:34)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Type: IP (0x0800)
Internet Protocol, Src: 192.168.1.2 (192.168.1.2), Dst: 192.168.1.1 (192.168.1.1)
    Version: 4
    Header length: 20 bytes
    Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
        0000 00.. = Differentiated Services Codepoint: Default (0x00)
        .... ..0. = ECN-Capable Transport (ECT): 0
        .... ...0 = ECN-CE: 0
    Total Length: 176
    Identification: 0x313c (12604)
    Flags: 0x00
        0... = Reserved bit: Not set
        .0.. = Don't fragment: Not set
        ..0. = More fragments: Not set
    Fragment offset: 0
    Time to live: 128
    Protocol: ICMP (0x01)
    Header checksum: 0x0000 [incorrect, should be 0x85bd]
        [Good: False]
        [Bad : True]
    Source: 192.168.1.2 (192.168.1.2)
    Destination: 192.168.1.1 (192.168.1.1)
Internet Control Message Protocol
    Type: 3 (Destination unreachable)
    Code: 3 (Port unreachable)
    Checksum: 0xb08d [correct]
    Internet Protocol, Src: 192.168.1.1 (192.168.1.1), Dst: 192.168.1.2 (192.168.1.2)
        Version: 4
        Header length: 20 bytes
        Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
            0000 00.. = Differentiated Services Codepoint: Default (0x00)
            .... ..0. = ECN-Capable Transport (ECT): 0
            .... ...0 = ECN-CE: 0
        Total Length: 168
        Identification: 0x4d97 (19863)
        Flags: 0x00
            0... = Reserved bit: Not set
            .0.. = Don't fragment: Not set
            ..0. = More fragments: Not set
        Fragment offset: 0
        Time to live: 255
        Protocol: UDP (0x11)
        Header checksum: 0xea59 [correct]
            [Good: True]
            [Bad : False]
        Source: 192.168.1.1 (192.168.1.1)
        Destination: 192.168.1.2 (192.168.1.2)
    User Datagram Protocol, Src Port: syslog (514), Dst Port: syslog (514)
        Source port: syslog (514)
        Destination port: syslog (514)
        Length: 148
        Checksum: 0x9fad
            [Good Checksum: False]
            [Bad Checksum: False]
    Syslog message: LOCAL0.INFO: Sep 03 14:43:46 Netopia-3000/23620308 2008 protocol:TCP srcIP:  192.168.1.113 dstIP: 207.97.206.124 srcPort: 3578 d
        1000 0... = Facility: LOCAL0 - reserved for local use (16)
        .... .110 = Level: INFO - informational (6)
        Message: Sep 03 14:43:46 Netopia-3000/23620308 2008 protocol:TCP srcIP:  192.168.1.113 dstIP: 207.97.206.124 srcPort: 3578 d
 
No.     Time        Source                Destination           Protocol Info
      3 0.000869    192.168.1.1           192.168.1.2           Syslog   LOCAL0.INFO: Sep 03 14:43:46 Netopia-3000/23620308 2008 protocol:TCP srcIP:  192.168.1.113 dstIP: 207.97.206.124 srcPort: 3578 dstPort:  443 permitted
Attachments:
 
test.txt (2.1 MB) (File Type Details) 
Wireshark recording of network traffic
 
[+][-]09.03.2008 at 08:09PM PDT, ID: 22384061

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[+][-]09.04.2008 at 03:10AM PDT, ID: 22385631

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[+][-]09.04.2008 at 03:26AM PDT, ID: 22385713

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[+][-]09.04.2008 at 08:35AM PDT, ID: 22388750

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[+][-]09.04.2008 at 08:44AM PDT, ID: 22388883

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[+][-]09.05.2008 at 08:16AM PDT, ID: 22399860

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About this solution

Zones: Internet Control Message Protocol (ICMP), Miscellaneous Hardware, Networking Hardware
Tags: ICMP Destination unreachable (port unreachable)
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Solution Provided By: bmilne1957
Participating Experts: 2
Solution Grade: A
 
 
[+][-]09.05.2008 at 08:21AM PDT, ID: 22399917

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