pe masina unde ruleza dhcpd am pe INPUT regulile:

Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0          icmp type
8 limit: avg 10/sec burst 5
ACCEPT     all  --  127.0.0.1            0.0.0.0/0
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpt:21
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpt:2111
ACCEPT     tcp  --  192.168.0.192/26     0.0.0.0/0          tcp dpt:25
ACCEPT     tcp  --  192.168.0.192/26     0.0.0.0/0          tcp dpt:110
ACCEPT     udp  --  192.168.0.192/26     0.0.0.0/0          udp dpt:110
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpt:80
ACCEPT     tcp  --  192.168.0.192/26     0.0.0.0/0          tcp dpt:3128
ACCEPT     tcp  --  192.168.0.192/26     0.0.0.0/0          tcp dpt:53
ACCEPT     udp  --  192.168.0.192/26     0.0.0.0/0          udp dpt:53
ACCEPT     tcp  --  192.168.0.228        0.0.0.0/0          tcp dpt:3000
ACCEPT     tcp  --  192.168.0.228        192.168.0.193      tcp dpt:53696
ACCEPT     tcp  --  0.0.0.0/0            192.168.0.193      tcp dpt:4012
DROP       tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpt:135
DROP       udp  --  0.0.0.0/0            0.0.0.0/0          udp dpt:135
DROP       tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpt:445
DROP       udp  --  0.0.0.0/0            0.0.0.0/0          udp dpt:445
DROP       tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpts:137:139
DROP       udp  --  0.0.0.0/0            0.0.0.0/0          udp dpts:137:139
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0          state
RELATED,ESTABLISHED
DROP       all  --  0.0.0.0/0            0.0.0.0/0

accesul pe portul 67 nu este permis explicit pentru calculatoarele din
LAN si totusi dhcp-ul functioneaza, iata ce se intampla la un ipconfig
/renew dat de pe un pc din LAN:

12:30:36.308019 0:e0:98:94:62:84 0:50:fc:97:55:6 ip 342:
192.168.0.211.bootpc > 192.168.0.193.bootps:  xid:0x4459a132
C:192.168.0.211 [|bootp]
12:30:36.309231 0:50:fc:97:55:6 0:e0:98:94:62:84 ip 342:
192.168.0.193.bootps > 192.168.0.211.bootpc:  xid:0x4459a132
C:192.168.0.211 Y:192.168.0.211 [|bootp] (DF)

de ce functioneaza dhcp-ul?

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