diff options
Diffstat (limited to 'usr.sbin/arp/arp.8')
| -rw-r--r-- | usr.sbin/arp/arp.8 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/usr.sbin/arp/arp.8 b/usr.sbin/arp/arp.8 index 17b55fd..32b46fd 100644 --- a/usr.sbin/arp/arp.8 +++ b/usr.sbin/arp/arp.8 @@ -53,10 +53,14 @@ .Nm .Fl s Ar hostname ether_addr .Op Cm temp +.Op Cm reject +.Op Cm backhole .Op Cm pub Op Cm only .Nm .Fl S Ar hostname ether_addr .Op Cm temp +.Op Cm reject +.Op Cm backhole .Op Cm pub Op Cm only .Nm .Fl f Ar filename @@ -148,6 +152,18 @@ This type of entry is created automatically if detects that a routing table entry for .Ar hostname already exists. +.Pp +If the +.Cm reject +keyword is specified the entry will be marked so that traffic to +the host will be discarded and the sender will be notified the +host is unreachable. +The +.Cm blackhole +keyword is similar in that traffic discarded but the sender is +not notified. +These can be used to block external traffic to a host without +using a firewall. .It Fl S Ar hostname ether_addr Is just like .Fl s |
