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Quella che segue è la configurazione del PIX 501 che utilizziamo in ufficio (non configurato da me) viene utilizzato per collegare 3 sedi remote.


PIX Version 6.3(4)
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password *************** encrypted
passwd *********** encrypted
hostname fw-tu
domain-name dominio.it
clock timezone ECT 1
clock summer-time ECT recurring last Sun Mar 2:00 last Sun Oct 3:00
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list acl_in permit icmp any any echo
access-list acl_in permit icmp any any echo-reply
access-list acl_in permit icmp any any unreachable
access-list acl_in permit icmp any any time-exceeded
access-list acl_in permit ip 192.168.12.0 255.255.252.0 192.168.0.0 255.255.248.0
access-list acl_in permit ip 192.168.12.0 255.255.252.0 172.17.0.0 255.255.0.0
access-list acl_in deny ip any 192.168.0.0 255.255.0.0
access-list acl_in deny ip any 172.16.0.0 255.240.0.0
access-list acl_in deny ip any 10.0.0.0 255.0.0.0
access-list acl_in permit ip 192.168.12.0 255.255.252.0 any
access-list acl_out permit icmp any any echo-reply
access-list acl_out permit icmp any any time-exceeded
access-list acl_out permit icmp any any unreachable
access-list nonat permit ip 192.168.12.0 255.255.252.0 192.168.0.0 255.255.248.0
access-list nonat permit ip 192.168.12.0 255.255.252.0 172.17.0.0 255.255.0.0
access-list nonat_prova permit ip 192.168.12.0 255.255.252.0 192.168.0.0 255.255.248.0
access-list nonat_prova permit ip 192.168.12.0 255.255.252.0 172.17.0.0 255.255.0.0
pager lines 24
logging on
logging monitor warnings
logging buffered debugging
mtu outside 1500
mtu inside 1500
ip address outside pppoe setroute
ip address inside 192.168.12.200 255.255.255.0
ip verify reverse-path interface outside
ip verify reverse-path interface inside
ip audit info action alarm
ip audit attack action alarm
pdm location 192.168.1.18 255.255.255.255 inside
pdm location 192.168.1.20 255.255.255.255 inside
pdm location 192.168.0.0 255.255.248.0 inside
pdm location 192.168.12.0 255.255.252.0 inside
pdm location 10.0.0.0 255.0.0.0 outside
pdm location 172.17.0.0 255.255.0.0 outside
pdm location 172.16.0.0 255.240.0.0 outside
pdm location 192.168.0.0 255.255.248.0 outside
pdm location 192.168.0.0 255.255.0.0 outside
pdm location 192.168.0.0 255.255.252.0 inside
pdm logging informational 100
pdm history enable
arp timeout 14400
global (outside) 1 interface
nat (inside) 0 access-list nonat
nat (inside) 1 192.168.12.0 255.255.252.0 0 0
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
access-group acl_out in interface outside
access-group acl_in in interface inside
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
ntp server 192.168.1.2 source inside
http server enable
http 192.168.12.0 255.255.252.0 inside
http 192.168.0.0 255.255.248.0 inside
snmp-server host inside 192.168.1.18
snmp-server host inside 192.168.1.20
no snmp-server location
no snmp-server contact
snmp-server community mc_sme
no snmp-server enable traps
floodguard enable
sysopt connection permit-ipsec
service resetinbound
service resetoutside
crypto ipsec transform-set STRONG esp-3des esp-sha-hmac
crypto ipsec transform-set LIGHT esp-des esp-sha-hmac
crypto map prova 10 ipsec-isakmp
crypto map prova 10 match address nonat_prova
crypto map prova 10 set peer w.x.y.z
crypto map prova 10 set transform-set STRONG
crypto map prova interface outside
isakmp enable outside
isakmp key ******** address w.x.y.z netmask 255.255.255.255
isakmp identity address
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption 3des
isakmp policy 10 hash sha
isakmp policy 10 group 1
isakmp policy 10 lifetime 0
telnet 192.168.12.0 255.255.252.0 inside
telnet timeout 10
ssh 192.168.12.0 255.255.252.0 inside
ssh 192.168.0.0 255.255.248.0 inside
ssh timeout 10
management-access inside
console timeout 10
vpdn group pppoex request dialout pppoe
vpdn group pppoex localname USERNAME
vpdn group pppoex ppp authentication pap
vpdn username USERNAME password ********
dhcpd address 192.168.12.201-192.168.12.232 inside
dhcpd lease 3600
dhcpd ping_timeout 750
dhcpd domain dominio.it
dhcpd auto_config outside
terminal width 80
banner motd
banner motd prova Srl
banner motd
banner motd ----------------------------------------
banner motd Ogni accesso non autorizzato e' proibito
banner motd Unauthorized access is prohibited
banner motd ----------------------------------------
Cryptochecksum:ebc9f2419416392de91a8eaaf1eb152b


La mia necessità è quella di pubblicare sull'ip pubblico che ho una ipcam raggiungibile tramite web.

Per cui alla configurazione ho aggiunto:

no fixup protocol http
static (inside,outside) tcp "IP_pubblico" 80 192.168.12.210 80 netmask 255.255.255.255 0 0
access-list ipcam permit tcp any interface outside eq 80
access-group ipcam in interface outside

MA il tutto non sembra funzionare, sull'interfaccia esterna del firewall c'è un router cisco che dalla configurazione sembra proprio che non faccia altro che dare l'ip al firewall. Ditemi se avete bisogno qualche altro dettaglio.

Intanto:

La subnet interna è 255.255.252.0 , le tue correzzioni erano per farla diventare 255.255.255.0 ?

Si perchè ho visto che:
ip address inside 192.168.12.200 255.255.255.0

Se la subnel interna è giusta allora:

no nat (inside) 1 0.0.0.0 0.0.0.0 0 0

e basta

Purtroppo non funziona.....
Esiste un modo abbastanza semplice per verificare cosa mi blocca il firewall, una specie di log in modo da capire dove viene respinto l'accesso alla rete???

Ho fatto la più grande vaccata della mia carriera.......il gateway sulla IPCAM non era impostato