tcpdump -A -s 0 -i lagg1.36 'tcp and dst 192.168.100.1 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)'

M.9.M.<.POST /SpaceX.API.Device.Device/Handle HTTP/1.1
Host: 192.168.100.1:9201
Content-Type: application/grpc-web+proto
Connection: keep-alive
x-grpc-web: 1
Accept: */*
Accept-Language: en-us
Content-Length: 8
Accept-Encoding: gzip, deflate
User-Agent: Starlink/2606 CFNetwork/1197 Darwin/20.0.0


13:54:36.865355 IP X.X.X.X.60941 > 192.168.100.1.9201: Flags [P.], seq 1846:1854, ack 2416, win 4096, options [nop,nop,TS val 1293760787 ecr 1304640755], length 8
E..<..@[email protected]...$?..d...#..fh.........&......
M.9.M.<.......>.
13:54:38.915760 IP X.X.X.X.60941 > 192.168.100.1.9201: Flags [P.], seq 1854:2155, ack 2899, win 4096, options [nop,nop,TS val 1293762829 ecr 1304642811], length 301
E..a..@[email protected]...$?..d...#..fh....r.....X.....