Port 23 suddenly open: Skype?

[scouselad]

I have recently gotten into the habit of running GRC's ShieldsUp every time I install a new bit of internet/networking software. So when I recently installed Skype (VoIP app) I ran it again. It said that telnet (port 23) was open.

This is rather worrying, but I'm not sure if it's Skype or my router, because I recently had to reset it and reconfigure everything, so I might have missed something.

I've looked through the router's numerous config screens and I can't find anything that suggest's that it's leaving port 23 open.

Is there a simple way to close this port? I've never had this problem before!

Thanks in advance,
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PS I'm running XP Pro SP2, with WIndows Firewall on, as well as a wireless router which also acts as a hardware firewall.

[sjd]

This little free utility will give you some info/options.

CurrPorts, http://www.nirsoft.net/utils/cports.html

[Ol'Tunzafun]

Skype doesn't need port 23 to operate. I would start by opening up the management console and disablng the Telnet service, if it is not needed.
It may also be advisable to scan for virus, or more particularly, a trojan which may have opened this port.

http://www.trojanscan.com/

[scouselad]

Well, cport didn't show any services using port 23, telnet isn't running, and trojan scan (as well as adaware and spybot) didnt show any malware, so.... i'm rather confused. I'll run a virus scan (avg) sometime, but if trojanscan didnt find anything i don't see what avg could find...

Thanks anyway, if you have any other ideas let me know!

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[r8500]

Just close the port on your router.

[scouselad]

Yeah lol, I know that's what I need to do, but I've no idea how close a port on my router, only how to open them! The router's config has no "telnet server" option and I certainly haven't forwarded port 23.

So how can I close the port?

Thanks again,
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