Forum Discussion
moog67_108621
Nimbostratus
Nimbostratustcpdump portrange option
Hi everyone,
I'm trying to capture traffic directed to a certain range of tcp ports with tcpdump.
When using the "portrange" expression I get a syntax error:
tcpdump -i -s0 -w capture_file...
try:
tcpdump -i SRV -s0 -w capture_file.trc port 8080 or port 8081 or port 8082
This worked for me, I saw traffic on all 3 ports in both directions in my dump. My only diff was the interface name.
This was on 10.2.4 HF5, tcpdump version 3.9.4, libpcap version 0.7.2
Again, no idea why portrange doesn't work, but I can confirm the same problem on this version.
mimlo_61970
Cumulonimbus
Cumulonimbustry:
tcpdump -i SRV -s0 -w capture_file.trc port 8080 or port 8081 or port 8082
This worked for me, I saw traffic on all 3 ports in both directions in my dump. My only diff was the interface name.
This was on 10.2.4 HF5, tcpdump version 3.9.4, libpcap version 0.7.2
Again, no idea why portrange doesn't work, but I can confirm the same problem on this version.
moog67_108621Nimbostratus
NimbostratusThanks mimlo!!
It finally worked as I need it, I can see traffic on both directions as well.
We'll be upgrading to 11.x in the short term , I'll give it another go then.
Regards
moog67