ttl pro udp fw rule/ dynamicke rule
Radim Kolar
hsn at netmag.cz
Sat Aug 21 20:37:00 CEST 2004
mam pocitac s caching dns daemon pgsqldnscache /vlastni hack/ zalozeny
na djbdns. Narozdil od pdnsd funguje.
pouzivam dynamicke firewall rule abych matchoval prichozi dns odpovedi, jinak
to asi nejde protoze muj source port je nahodny.
net.inet.ip.fw.dyn_udp_lifetime=15
02100 2285 401453 allow udp from any to any out keep-state
64010 0 0 deny log udp from any to any
udp:
2165 datagrams received
843 dropped due to no socket
icmp:
843 calls to icmp_error
Output histogram:
destination unreachable: 843
Otazky:
1. bylo tech 843 prichozich packetu zahozeno protoze mam maly fw.dyn_udp_lifetime?
2. kde najdu v ipfw statistiku/count prichozich dns packetu. Tedy tech
ktere matchovaly ty dynamicky vytvorene rule.
3. Ty dropovane packety nejsou zbloudile udp scany, protoze na ty mam
zvlastni ruli a ta nic nechytla. Je to tak?
More information about the Users-l
mailing list