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Skype & BEFSX41

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by NoelT, Apr 30, 2005.

  1. NoelT

    NoelT Network Guru Member


    I'm using a BEFSX41 1.50.18 at home, on 2meg cable.

    I'm trying to get Skype working but everytime I try to log in, the router resets.

    I've been online with the Linksys live support and they acknowledge that there's a problem. They suggested the following:

    I have checked with the department and appparently this problem is still being looked into. We know SKYPE is one of the most popular programs for VOIP so they are trying to find a fix for this. One of the clients that is having the same problem tried the following and he was able to somehow stop the router from restarting: 1. block all in/out traffic for SKYPE to
    2. allow all incoming traffic on tcp 443 port for SKYPE program
    3. allow all outgoing traffic from tcp 22045 port for SKYPE program
    4. block all other in/out traffic for SKYPE

    I'm OK with firewalls, but to be honest, I haven't played around with my linksys box too much. Any experts want to comment on what they've said?

    Or any answers that will help me with this would be most welcome.

    Thanks in advance
  2. DocLarge

    DocLarge Super Moderator Staff Member Member

    Is Skype a vpn application or is something similar to Vonage? This is the first I've ever heard of such a thing, personally...

  3. NoelT

    NoelT Network Guru Member

    Skype is a VOIP application. free PC-PC calls, plus VERY cheap calls to any normal landline anywhere in the world.
  4. NoelT

    NoelT Network Guru Member

    A bit of an update, don't know if it will help.

    I've got another firewall in work, it gives me a Ping of Death alert every time I log into Skype. It doesn't reset the firewall, but it seems a bit too coincidental.

    According to the help:

    A ping of death is a denial of service attack that attempts to crash your system by sending a fragmented IP packet. IP does not allow single packets to exceed 65536 bytes, but the fragments themselves can add up to more than that. Since this is a theoretically impossible condition, operating systems crash when they receive this data. A ping of death attack can be launched from older versions of Windows-newer versions of Windows prevent users from sending these packets.

    Not sure if anyone can shed any further light on this, but it would help!

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