Firewall
Cisco ASA 5510 介面間路由
我正在嘗試設置 Cisco 5510 來路由外部和內部介面之間的流量,它們都屬於公共 IP 子網。我們的 ISP 為我們分配了一個我分配給外部的單點對點 IP (207.107.110.150/30) 和一個我分配給內部介面的 /29 (207.107.101.112/29) 207.107.101.113 .
通過身份 NAT 設置,從 /29 中的主機,我可以 ping ASA,並且可以 ping 路由中的下一跳 (207.107.110.149),但是發送到全球網際網路的流量不會返回到內部界面。
根據消息“
6 Jul 01 2014 20:53:42 302015 8.8.4.4 207.107.101.115 Built outbound UDP connection 7052 for Outside:8.8.4.4/53 (8.8.4.4/53) to inside:207.107.101.115/57511 (207.107.101.115/57511)
”,看起來流量正在到達 ASA,因此丟棄它們的是 ASA。ASA 的“Packet Tracer”顯示這些應該退出內部介面。
稍微混淆的配置:
asdm image disk0:/asdm521.bin no asdm history enable : Saved : ASA Version 7.2(1) ! hostname ***** domain-name ***** enable password ***** encrypted names ! interface Ethernet0/0 nameif Outside security-level 0 ip address 207.107.110.150 255.255.255.252 ! interface Ethernet0/1 nameif inside security-level 50 ip address 207.107.101.113 255.255.255.248 ! interface Ethernet0/2 shutdown no nameif no security-level no ip address ! interface Management0/0 nameif management security-level 100 ip address 172.24.19.1 255.255.255.0 management-only ! passwd ***** encrypted ftp mode passive dns server-group DefaultDNS domain-name rsius.com access-list Outside_access_in extended permit ip any 207.107.101.112 255.255.255.248 pager lines 24 logging enable logging asdm informational mtu management 1500 mtu inside 1500 mtu Outside 1500 asdm image disk0:/asdm521.bin no asdm history enable arp timeout 14400 nat (inside) 0 207.107.101.112 255.255.255.248 access-group Outside_access_in in interface Outside route Outside 0.0.0.0 0.0.0.0 207.107.110.149 1 timeout xlate 3:00:00 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 uauth 0:05:00 absolute http server enable http 0.0.0.0 0.0.0.0 inside http 172.24.19.0 255.255.255.0 management no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart telnet timeout 5 ssh timeout 5 console timeout 0 dhcpd address 172.24.19.2-172.24.19.254 management dhcpd enable management ! ! class-map inspection_default match default-inspection-traffic ! ! policy-map type inspect dns preset_dns_map parameters 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 ! service-policy global_policy global prompt hostname context : end
需要進行哪些更改才能將流量從內部路由到外部並返回?
因為你沒有在你的內部界面上打招呼:
nat(內部)0 207.107.101.112 255.255.255.248
您的提供商需要知道子網 207.107.101.112/29 是通過 207.107.110.150 路由的。他們將依次為我們其他人廣播路由,以通過您的 ASA 的外部介面到達您的內部介面。
您是否與他們核對以確保相應地路由子網?