Cisco
Cisco ASA 5505 - 用於 SIP/VoIP 版本 8.4 的 NAT 或埠轉發
我剛剛安裝了一個 NEC PBX，它允許我使用 SIP 中繼來提供 VoIP 服務，我的網關是執行 8.4 的 Cisco ASA 5505，我只有一個公共/靜態 IP 地址。
到目前為止，我的中繼正在註冊，我可以撥打電話並且一切正常，但來電是靜音的（兩種方式）。我假設它是因為 UDP 埠 1024-1215 沒有被轉發，SIP (5060) 也沒有。
我需要做的是轉發 1024-1215 的 UDP 埠範圍，但是似乎我無法為 UDP 創建埠映射，或在靜態路由中為 UDP 定義埠範圍。任何正確方向的幫助將不勝感激！（有人告訴我 ASA 8.4 將允許轉發一系列埠，所以我升級了，現在我對新命令有點迷失了）
使用 ASDM，我嘗試了幾次，但結果如下：
[OK] object network NEC_DSX object network NEC_DSX [ERROR] nat (inside,outside) static interface service udp 1024-1215 1024-1215 nat (inside,outside) static interface service udp 1024-1215 1024-1215 ^ ERROR: % Invalid input detected at '^' marker. I also tried: [OK] object network NEC_DSX object network NEC_DSX [ERROR] nat (inside,outside) static interface service udp 1024 1024 NAT unable to reserve ports. ------------------------ Here is my current config : ASA Version 8.4(4) ! hostname ciscoasa enable password 8Ry2YjIyt7RRXU24 encrypted passwd 2KFQnbNIdI.2KYOU encrypted names name 24.173.xxx.xxx StaticOutside description WAN IP ! interface Ethernet0/0 switchport access vlan 2 ! interface Ethernet0/1 ! interface Ethernet0/2 ! interface Ethernet0/3 ! interface Ethernet0/4 ! interface Ethernet0/5 ! interface Ethernet0/6 ! interface Ethernet0/7 ! interface Vlan1 nameif inside security-level 100 ip address 192.168.3.1 255.255.255.0 ! interface Vlan2 nameif outside security-level 0 ip address StaticOutside 255.255.255.252 ! boot system disk0:/asa844-k8.bin boot system disk0:/asa832-k8.bin ftp mode passive object network obj-192.168.3.5 host 192.168.3.5 object network obj_any subnet 0.0.0.0 0.0.0.0 object network NEC_DSX host 192.168.3.150 description NEC DSX SYSTEM access-list outside_access_in extended permit tcp any host 192.168.3.5 eq 3389 log disable pager lines 24 logging asdm informational mtu inside 1500 mtu outside 1500 icmp unreachable rate-limit 1 burst-size 1 asdm image disk0:/asdm-649-103.bin no asdm history enable arp timeout 14400 ! object network obj-192.168.3.5 nat (inside,outside) static interface service tcp 3389 3389 object network obj_any nat (inside,outside) dynamic interface access-group outside_access_in in interface outside route outside 0.0.0.0 0.0.0.0 24.173.100.85 1 timeout xlate 3:00:00 timeout pat-xlate 0:00:30 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02 timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00 timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00 timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute timeout tcp-proxy-reassembly 0:01:00 timeout floating-conn 0:00:00 dynamic-access-policy-record DfltAccessPolicy user-identity default-domain LOCAL http server enable http 192.168.3.0 255.255.255.0 inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart telnet timeout 5 ssh timeout 5 ssh key-exchange group dh-group1-sha1 console timeout 0 dhcpd auto_config outside ! dhcpd address 192.168.3.10-192.168.3.38 inside dhcpd dns 4.2.2.1 4.2.2.2 interface inside dhcpd enable inside ! threat-detection basic-threat threat-detection statistics host threat-detection statistics access-list no threat-detection statistics tcp-intercept webvpn ! class-map inspection_default match default-inspection-traffic ! ! policy-map type inspect dns preset_dns_map parameters message-length maximum client auto message-length maximum 512 policy-map global_policy class inspection_default inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect rsh inspect rtsp inspect esmtp inspect sqlnet inspect skinny inspect sunrpc inspect xdmcp inspect sip inspect netbios inspect tftp inspect ip-options class class-default user-statistics accounting ! service-policy global_policy global prompt hostname context no call-home reporting anonymous Cryptochecksum:85d3bff9e7eb561bf8ee4f27b11a6cf4 : end
您不必在
sip inspect打開時顯式轉發 RTP 埠 (>1024)。當 SIPINVITE通過時，路由器將在通話期間打開適當的 RTP 埠。至於 NATing SIP，您缺少 NAT 命令和訪問列表條目：
! this should be tightened to allow traffic only from your telephone company, or ! people with bad intent will happily place international calls on your account access-list outside_access_in extended permit udp any host 192.168.3.150 eq 5060 ! nat 5060 to 5060 object network NEC_DSX nat (inside,outside) static interface service udp 5060 5060雖然不需要，但轉發範圍的正確語法是：
object service rtp-1024-1215 service udp source range 1024 1215 object network NEC_DSX_RTP host 192.168.3.150 nat (inside,outside) static interface service rtp-1024-1215 rtp-1024-1215