diff options
| -rw-r--r-- | sys/netinet/tcp.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/sys/netinet/tcp.h b/sys/netinet/tcp.h index 86c9548..27d45aa 100644 --- a/sys/netinet/tcp.h +++ b/sys/netinet/tcp.h @@ -120,18 +120,18 @@ struct tcphdr { #define TCP6_MSS 1220 /* - * Limit the lowest MSS we accept from path MTU discovery and the TCP SYN MSS - * option. Allowing too low values of MSS can consume significant amounts of - * resources and be used as a form of a resource exhaustion attack. + * Limit the lowest MSS we accept for path MTU discovery and the TCP SYN MSS + * option. Allowing low values of MSS can consume significant resources and + * be used to mount a resource exhaustion attack. * Connections requesting lower MSS values will be rounded up to this value - * and the IP_DF flag is cleared to allow fragmentation along the path. + * and the IP_DF flag will be cleared to allow fragmentation along the path. * * See tcp_subr.c tcp_minmss SYSCTL declaration for more comments. Setting * it to "0" disables the minmss check. * - * The default value is fine for the smallest official link MTU (256 bytes, - * AX.25 packet radio) in the Internet. However it is very unlikely to come - * across such low MTU interfaces these days (anno domini 2003). + * The default value is fine for TCP across the Internet's smallest official + * link MTU (256 bytes for AX.25 packet radio). However, a connection is very + * unlikely to come across such low MTU interfaces these days (anno domini 2003). */ #define TCP_MINMSS 216 |
