I have a T1 and as of the past few days its been very slow. I have a solarwinds network performance montior installed and its telling me that my transmit rate on my T1 is at 97%. When looking at my netflow data it lists my top 5 transmitters. See below: They are all yahoo mail servers:
Top 5 Transmitters
Last 15 Minutes
Endpoint Total Bytes Total Packets Percent
mta-v3.mail.vip.mud.yahoo.com (188.8.131.52) 483.4 Kbytes 11.977 K packets 16.91%
mta-v2.mail.vip.mud.yahoo.com (184.108.40.206) 453.1 Kbytes 11.26 K packets 15.85%
mta-v1.mail.vip.ac4.yahoo.com (220.127.116.11) 449.8 Kbytes 11.235 K packets 15.74%
mta-v1.mail.vip.sk1.yahoo.com (18.104.22.168) 443.8 Kbytes 11.072 K packets 15.53%
mta-v1.mail.vip.re4.yahoo.com (22.214.171.124) 429.8 Kbytes 10.733 K packets 15.04%
Can anyone explain this? Why 5 different yahoo servers are 5 biggest trasmitters? I guess I could block these addresses on the firewall. Any thoughts?
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