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In /etc/services on a few machines I've checked, port 9898 is associated with a service called MonkeyCom:

monkeycom   9898/udp     # MonkeyCom
monkeycom   9898/tcp     # MonkeyCom

The first reference I found in a google search for MonkeyCom says it's part of the Sasser virus. That seems like a misinterpretation to me -- it's more likely that Sasser is using 9898 but that there's some older service called MonkeyCom which originally got the assignment.

Who can tell me what MonkeyCom is?

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up vote 8 down vote accepted

MonkeyCom is (or was - as far as I can determine it is now defunct) a videophone/file transfer program.
As far as I can determine nothing legitimate is currently using port 9898 - it's pretty much just Sasser and a few other bits of nasty.

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Do you have a source for that defunct videophone program or the reference to it? – Doug Harris Oct 8 '10 at 19:54
    
serverwatch.com/tutorials/article.php/10825_3521746_2/… is the most authoritative one I found. The referenced site is long gone however & makes no mention of the MonkeyCom product. – voretaq7 Oct 8 '10 at 21:03
1  
Old but still useful thread. -- Consider pgpool as a prime candidate to be the root-cause for this false positive. As suggested by @JoeVanDyk below, lsof | grep ":9898" or lsof -i :9898 may not reveal 'pgpool' even though its is installed as middleware and part of a posgresql setup. Better look at yr FW activity log to see what really makes yr 9898 TCP port look busy/open. nmap will sometimes report "monkeycom" as the associated application, a false positive for a "Dabber/Sasser" type worm infection (prevalent among M$ Win users). "False" as in it is really not there ! – Cbhihe yesterday

Tripwire Enterprise uses 9898 as it's default port for communication between server and agent.

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I can conrirm that the tripwire agent is running on this port with an enterprise license on my machines. I would have voted up the first tripwire suggestion but don't have the rep points yet. – user180779 Jul 8 '13 at 21:07

pgpool might be using that port.

You can do a "lsof | grep 9898" and check.

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Or lsof -i :9898 – mugen kenichi Oct 19 '11 at 12:51
    
+1 for mentioning pgpool. – Cbhihe yesterday

The definitive source for Port Assignments is IANA http://www.iana.org/assignments/port-numbers from which you can find a name and email address of someone who might know the answer to your question. More probably the email address is no longer valid :-(

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Echoing RedGrittyBrick's point. Came across the same. MonkeyCom is a port association for a legitimate program which is likely also exploited in other instances.

Check out the following listing for a bit more detail

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protected by Chris S Dec 29 '13 at 19:56

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