While troubleshooting another issue I saw that the MSS of the webservers that I host behind my ASA is 1380.
LAB-ASA# sh run all | inc 1380
sysopt connection tcpmss 1380
Then I noticed that the MSS of webservers like amazon.com and cnn and cnet are 1460. If I put my a PC on the local subnet of one of my webservers it SYNACKs with a MSS of 1460. That extra 80 bytes per TCP packet have to increase performance a tiny bit right ?
If I do not have a VPN endpoint on this ASA do I have any reason not to increase the MSS to 1460 with "sysopt connection tcpmss 1460" ?