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Skype call quality suffering from UDP blocking

orangealert
Hello

I'm having an issue with Skype and call quality because of UDP blocking.
A forum/Google search did not turn up anything relevant.

Using ASG home licence 8.202 - (haven't updated in awhile)

In the Skype Call Technical Info window, I have consistently bad local UDP.

Skype Call Technical Info dialog
-------------------------------------------
Packet loss=0.0% (5)
Send packet loss=0.0%/0.0%
Recv packet loss=0.1%/0.1%

UDP status=local:Bad remote:Good
-------------------------------------------

From O'Reilly Skype Hacks: "If either end of a Skype call has poor UDP, call quality will suffer"

I use the SOCKS5 proxy /w authentication for Skype, and have no problems making/receiving calls.
I have an allow all firewall rule for the port I'm using for incoming connections.
and a DNAT rule:  Allow - Any->Skype->WAN - Dest: MYPC - Auto Firewall rule

I tried turning off IPS or making an allow all for ICMP/UDP in IPS exceptions as a test - no good
Also tried turning of ICMP and UDP flood protection.

All tests with the Skype Echo Call Test Service consistently show bad local UDP,
in the Call Technical Info dialog.

IPS log shows
severity="info" sys="SecureNet" sub="ips" name="ICMP flood detected" action="ICMP flood" fwrule="60014" initf="eth0" srcip="MYPC" dstip="ASG" 

Anyone have an idea what I can do about this?


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Parents
  • 0
    also get rid of that nat rule..you are now having two routes internally for your skype traffic..either use the nat rule(not advise IMO) or use only the socks(advised).  I use only the socks and it works great as long as you set it up correctly both on the ASG and the skype itself.  Skype won't automatically use the socks you have to tell it or it will try to use the p2p style it likes to use.

    Owner:  Emmanuel Technology Consulting

    http://etc-md.com

    Former Sophos SG(Astaro) advocate/researcher/Silver Partner

    PfSense w/Suricata, ntopng, 

    Other addons to follow

Reply
  • 0
    also get rid of that nat rule..you are now having two routes internally for your skype traffic..either use the nat rule(not advise IMO) or use only the socks(advised).  I use only the socks and it works great as long as you set it up correctly both on the ASG and the skype itself.  Skype won't automatically use the socks you have to tell it or it will try to use the p2p style it likes to use.

    Owner:  Emmanuel Technology Consulting

    http://etc-md.com

    Former Sophos SG(Astaro) advocate/researcher/Silver Partner

    PfSense w/Suricata, ntopng, 

    Other addons to follow

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