https://cybertoolchain.io/tools/tcpdump New releases and features in tcpdump, tracked by The Cyber Toolchain. en Mon, 21 Sep 2026 19:03:44 GMT https://github.com/the-tcpdump-group/tcpdump/compare/tcpdump-4.99.6...tcpdump-4.99.7 https://github.com/the-tcpdump-group/tcpdump/compare/tcpdump-4.99.6...tcpdump-4.99.7 Mon, 21 Sep 2026 19:03:44 GMT tcpdump 4.99.7 extends MPTCP dissection, adds TCP AccECN flag support, and warns on misused `--count`.⁠︀︄︇︀︅︉︀︅︀︀︃︀︀︅︅︀︅︊︀︄︆︀︃︄⁠ • Adds an error message when `--count` is used without `-r` or `-V`.⁠︀︄︇︀︅︉︀︅︀︀︃︀︀︅︅︀︅︊︀︄︆︀︃︄⁠ • Adds dissection of the MPTCP `MP_TCPRST` sub-option (subtype `0x8`), including `U`/`V`/`W`/`T` flags and reset reasons such as 'Middlebox interference'. • Parses the `data_len` field in the MPTCP `MP_CAPABLE` option and prints all eight capability flags (`A` through `H`). • Adds support for decoding the TCP `AE` (AccECN) flag in TCP header output. Full history on Cyber Toolchain: https://cybertoolchain.io/tools/tcpdump https://github.com/the-tcpdump-group/tcpdump/blob/master/CHANGES https://github.com/the-tcpdump-group/tcpdump/blob/master/CHANGES Tue, 30 Dec 2025 00:00:00 GMT tcpdump 4.99.6 adds -g option for single-line IPv4 output and supports unit suffixes on -C file size • Adds the `-g` option to print IPv4 verbose output on a single line • Adds optional unit suffix support on the `-C` file size parameter • Updates VXLAN decoding to include UDP port 8472 (used by Linux) as a default known port Breaking changes: • Removes protocol decoding support for the obsolete OTV draft-hasmit-otv-04 Full history on Cyber Toolchain: https://cybertoolchain.io/tools/tcpdump