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-rw-r--r-- | tcpdump.1.in | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/tcpdump.1.in b/tcpdump.1.in index 2fa50b5b..b51c4eb6 100644 --- a/tcpdump.1.in +++ b/tcpdump.1.in @@ -2052,24 +2052,6 @@ in the tcpdump source tree root. NIT doesn't let you watch your own outbound traffic, BPF will. We recommend that you use the latter. .LP -On Linux systems with 2.0[.x] kernels: -.IP -packets on the loopback device will be seen twice; -.IP -packet filtering cannot be done in the kernel, so that all packets must -be copied from the kernel in order to be filtered in user mode; -.IP -all of a packet, not just the part that's within the snapshot length, -will be copied from the kernel (the 2.0[.x] packet capture mechanism, if -asked to copy only part of a packet to userspace, will not report the -true length of the packet; this would cause most IP packets to get an -error from -.BR tcpdump ); -.IP -capturing on some PPP devices won't work correctly. -.LP -We recommend that you upgrade to a 2.2 or later kernel. -.LP Some attempt should be made to reassemble IP fragments or, at least to compute the right length for the higher level protocol. .LP |