Snort mailing list archives

Re: cannot decode data link type 239


From: Sharif Uddin <Sharif.Uddin () spectrumasa com>
Date: Tue, 9 Sep 2014 17:13:47 +0000

tcpdump -s 100 icmp -i ens34 -vv
tcpdump: WARNING: ens34: no IPv4 address assigned
tcpdump: listening on ens34, link-type EN10MB (Ethernet), capture size 100 bytes
18:12:52.081885 IP (tos 0x0, ttl 64, id 24766, offset 0, flags [none], proto ICMP (1), length 84)
    janus.uk.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13946, seq 1, length 64
18:12:52.082129 IP (tos 0x0, ttl 63, id 22430, offset 0, flags [none], proto ICMP (1), length 84)
    mail1.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13948, seq 1, length 64
18:12:52.083083 IP (tos 0x0, ttl 63, id 6404, offset 0, flags [none], proto ICMP (1), length 84)
    ukftp.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13950, seq 1, length 64
18:12:52.662074 IP (tos 0x0, ttl 64, id 43183, offset 0, flags [DF], proto ICMP (1), length 56)
    wan.uk.domain.com > spam.uk.domain.com: ICMP redirect no-dns-yet.demon.co.uk to host janus.uk.domain.com, length 36
        IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 76)
    spam.uk.domain.com.ntp > no-dns-yet.demon.co.uk.ntp:  [|ntp]
18:12:53.082484 IP (tos 0x0, ttl 64, id 24767, offset 0, flags [none], proto ICMP (1), length 84)
    janus.uk.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13946, seq 2, length 64
18:12:53.082838 IP (tos 0x0, ttl 63, id 22431, offset 0, flags [none], proto ICMP (1), length 84)
    mail1.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13948, seq 2, length 64
18:12:53.083775 IP (tos 0x0, ttl 63, id 6405, offset 0, flags [none], proto ICMP (1), length 84)
    ukftp.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13950, seq 2, length 64
18:12:53.741482 IP (tos 0x0, ttl 64, id 20286, offset 0, flags [none], proto ICMP (1), length 84)
    wanacc.uk.domain.com > echo.uk.domain.com: ICMP echo request, id 38916, seq 1, length 64
18:12:54.083454 IP (tos 0x0, ttl 64, id 24768, offset 0, flags [none], proto ICMP (1), length 84)
    janus.uk.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13946, seq 3, length 64
18:12:54.083609 IP (tos 0x0, ttl 63, id 22432, offset 0, flags [none], proto ICMP (1), length 84)
    mail1.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13948, seq 3, length 64
18:12:54.084660 IP (tos 0x0, ttl 63, id 6406, offset 0, flags [none], proto ICMP (1), length 84)
    ukftp.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13950, seq 3, length 64
18:12:54.756659 IP (tos 0x0, ttl 64, id 20322, offset 0, flags [none], proto ICMP (1), length 84)
    wanacc.uk.domain.com > echo.uk.domain.com: ICMP echo request, id 38916, seq 2, length 64
18:12:55.083413 IP (tos 0x0, ttl 64, id 24769, offset 0, flags [none], proto ICMP (1), length 84)
    janus.uk.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13946, seq 4, length 64
18:12:55.083624 IP (tos 0x0, ttl 63, id 22433, offset 0, flags [none], proto ICMP (1), length 84)
    mail1.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13948, seq 4, length 64
18:12:55.084662 IP (tos 0x0, ttl 63, id 6407, offset 0, flags [none], proto ICMP (1), length 84)
    ukftp.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13950, seq 4, length 64
18:12:56.083351 IP (tos 0x0, ttl 64, id 24770, offset 0, flags [none], proto ICMP (1), length 84)
    janus.uk.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13946, seq 5, length 64
18:12:56.083538 IP (tos 0x0, ttl 63, id 22434, offset 0, flags [none], proto ICMP (1), length 84)
    mail1.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13948, seq 5, length 64
18:12:56.084631 IP (tos 0x0, ttl 63, id 6408, offset 0, flags [none], proto ICMP (1), length 84)
    ukftp.domain.com > uranus.uk.domain.com: ICMP echo reply, id 13950, seq 5, length 64

-----Original Message-----
From: James Lay [mailto:jlay () slave-tothe-box net]
Sent: 09 September 2014 18:04
To: snort-users () lists sourceforge net
Subject: Re: [Snort-users] cannot decode data link type 239

On 2014-09-09 11:01, Sharif Uddin wrote:
I have just tried and made no difference. Strace still gives me


socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 4 ioctl(4, SIOCGIFADDR,
{ifr_name="nflog", ???}) = -1 ENODEV (No such
device)
close(4)                                = 0
write(2, "ERROR: Cannot decode data link t"..., 40ERROR: Cannot decode
data link type 239
) = 40
write(2, "Fatal Error, Quitting..\n", 24Fatal Error, Quitting..
) = 24
close(3)                                = 0
exit_group(1)                           = ?
+++ exited with 1 +++







Got a pcap you can share?

James


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