About Stephen Carville

Stephen Carville · 12-20-2019

I received a complaint from a user who cannot send from his corporate email account to his Earthlink mail account. After tracing all the steps where a connection could be blocked, I isolated it to the firepower. Apparently Snort believes the server a...

Stephen Carville · 09-19-2019

When connecting to the wireless network I have noticed that the clients will often skip an AP 10 feet away and connect to one two floors up and 100+ feet away. That doesn't sound very efficient and data rates are pretty poor.Can this be fixed?My test...

Stephen Carville · 09-21-2018

I have been getting lot of complaints from the C-level about the speed of the wireless network. Tests on the wired network yield 700+ Mbps but the wireless strains to reach 24 Mbps.I do not expect the wireless network to match the wired network in s...

Stephen Carville · 05-16-2018

I have a new stack of three 9300s that seem to route traffic in some very confusing ways. I can reach the vlan address on the switch (10.214.184.1) from my workstation: # mtr -rnc 10 10.214.184.1 HOST: c00464.lereta.com Loss% Snt Last Avg Best Wrst S...

Stephen Carville · 04-12-2018

I received a spec sheet for a P2P VPN between an ASA 5585 and our ASA 5525 with the above requirement. AFAIK, it is not an option for the Cisco ASA. I think I've seen such an option for Checkpoint but, thankfully, we don't do Checkpoint here. OTOH,...

Stephen Carville · 12-26-2019

I checked Umbrella and it verified the MX IPs have been associated with malware recently so it looks like the blacklisting was justified. However, it seems to be lifted -- at least for the time being -- so the user can send emails normally.The bit ab...

Stephen Carville · 10-17-2018

In the testing environment, both Mac and Windows 10 laptops were able to reach 200 Mbps the 400 Mbps. Speeds are a little less in the real world but still much better than before. Thanks to everyone who helped.

Stephen Carville · 10-15-2018

Helpdesk has not yet brought me the promised Windows laptop but I was able to grab a Mac and test with it. Using iperf I was able to reach 200 Mb/2 to 400 Mb/s. That's with 80 MHz bandwidth. Not as good as I'd like it but way better than before.

Stephen Carville · 10-13-2018

@patoberli wrote: Ok great. What is the channel width you have configured on the 5 GHz interface of your test AP? Please note 30 and 43 Mbit/s are fairly close to the possible maximum you get with an 802.11n 1SS client on 2.4 or 5 GHz with a 20 MHz ...

Stephen Carville · 10-12-2018

Thank you for the reference. It is very helpful I was using SFTP to transfer files because that and FTP is what the developers are using. The transfer rates I get from iperf are consistent with the sftp speeds. EG: ------------------------------...

Member Since	‎03-19-2013 04:19 PM
Date Last Visited	‎04-23-2021 07:11 AM
Posts	87
Total Helpful Votes Received	60

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Connection to Earthlink mail servers blocked by Snort

How does a client choose which AP to connect to?

Improving Wireless Performance

Cisco 9300 Routing Traffic Weirdly

Key Exchange For Subnets?

Re: Connection to Earthlink mail servers blocked by Snort

Re: Improving Wireless Performance

Re: Improving Wireless Performance

Re: Improving Wireless Performance

Re: Improving Wireless Performance