Network technologies and trends:

November, 2017

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November 21, 2017  4:42 AM

Cisco Champions 2018 applications are open  

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, communities, social media, technologies, User groups

Cisco runs a program known as Cisco Champions, which purely runs on nominations, one can either nominate himself/ herself or someone whom they see as experts in Cisco Products and Technologies. Cisco expects the potential Cisco Champions to actively share their knowledge, expertise and thoughts in...

November 9, 2017  3:23 AM

What is “TCP Spurious Retransmission” ? And why does this occur for the FTP traffic passing through a Cisco ASA Firewall?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASA, Cisco, Cisco ASA, Filezilla, firewall, FTP, Network security, TCP

Recently we come across an issue where FTP  connection was not established between the client and the FTP server. The connection was passing through the Cisco ASA Firewall. Upon troubleshooting, we discovered 3-way TCP handshake was happening, however, once the login name and password entered to...


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