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    *bump* Anyone can throw some light in this? ...

    *bump*
    Anyone can throw some light in this?

    Thanks in advance.
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    phishphreek, thanks for your comments. Packet...

    phishphreek, thanks for your comments. Packet manipulation seems too complex for the time I have available, most interesting though.

    Anyway, I am delving in the trace of the packet and found some...
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    So I guess that being able to reach those IPs is...

    So I guess that being able to reach those IPs is closely related to the problem, wherever it is.
    Is there any explanatio for this?? :confused:

    We are not using a similar IP range for public nor...
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    thanks for chiping in no, that is not what´s...

    thanks for chiping in

    no, that is not what´s happening

    If I traceroute from Company-A to mailserver-ISP-B, the trace goes beyond the IP where most of the other traces finish (209.99.224.205)...
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    OK, FWIW, I changed the DNS server used in...

    OK, FWIW,

    I changed the DNS server used in Comp-A workstation (from Comp-A´s ISP) for the ones of a different provider and the traceroute´s results are the same.

    I did that on-the-fly, no...
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    I would say results are similar, from the...

    I would say results are similar, from the troubled point (Company-A) I get the 3 way handshake and then nothing, it stalls there and no other packet seems to be passed between them.

    OTOH, from an...
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    OK, I agree that this is at a more basic level ...

    OK, I agree that this is at a more basic level

    This is what I got and tried to describe before:

    There are only 3 packets being transmitted, after that, the connection usually stays there...
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    I had scanned it when the issue began and there...

    I had scanned it when the issue began and there were some other ports available I think.

    If I read this correctly, I get nothing after the third packet, wich should be the server´s response. I...
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    I think I need IP Spoofing

    Hi,
    I have been dealing with this for several months now, and I am running out of ideas...


    Company-A has an internal mailserver working as expected.
    Company-B has it´s mail service hosted...
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