I have a BigIP target server and try to meassure the (average) rtt. Usually I do this with
sudo hping3 -S -p 80 <target>.
hping3 works fine with the listed parameters for arbitrary hosts, but for this server – I know it’s a F5 BigIP the tool doesn’t seem to work.
I can curl the target server at port 80 and 443 and browse it and nslookup it, however
hping3 returns the following:
sudo hping3 -S -p 80 -VVV XXXXXXXXXX using ens192, addr: XXXXXXXXXX, MTU: 1500 HPING XXXXXXXXXX (ens192 XXXXXXXXXX): S set, 40 headers + 0 data bytes ^C --- XXXXXXXXXX hping statistic --- 5 packets transmitted, 0 packets received, 100% packet loss round-trip min/avg/max = 0.0/0.0/0.0 ms
Not even showing a single line with sent packages although using -VVV.
To confuse me even more the requests for port 443 result in 0.0ms responses:
sudo hping3 -S -p 443 XXXXXXXXXX HPING XXXXXXXXXX (ens192 XXXXXXXXXX ): S set, 40 headers + 0 data bytes len=46 ip=XXXXXXXXXX ttl=250 DF id=52797 sport=443 flags=SA seq=0 win=4380 rtt=0.0 ms len=46 ip=XXXXXXXXXX ttl=250 DF id=58358 sport=443 flags=SA seq=0 win=4380 rtt=0.0 ms ^C --- XXXXXXXXXX hping statistic --- 3 packets transmitted, 2 packets received, 34% packet loss round-trip min/avg/max = 0.0/0.0/0.0 ms