I had this issue once on a 2800 router acting as their firewall. The firewall is having trouble dealing with an excessive amount of fragmented packets. We tried upgrading, but it did not help. ISP said it was not on their side, but eventually the customer saw their truck down at the corner working on something, after that there were no more fragmented packets and no more downloading issues. So I would have a call with your ISP as well, unless you can download large files internally.
Yes, but you stated that the packet capture outside the FWSM module also had the out of order packets and re-transmissions. You could possibly resolve the issue by changing something on the FWSM, but I think the root of you problem would not be solved.
I don't know of any commands that will help with fragmentation on the ASA so I won't be much help there.
Yeah they won't be, it was the same issue with me even when I provided them packet captures of my laptop directly connected to the modem with the out of order packets. I agree it is definitely something in the FWSM that is killing the download. When I had my laptop connected to the modem large downloads completed fine, but I was not being firewalled and windows was able to handle the fragmentation.
If TAC comes back with a command to help the issue I would be interested in knowing it.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...