If a PC with a DHCP server is connected via VPN, with her serve IP addresses on the tunnel?
Situation: we have a few portable computers test Ubuntu running DHCP servers. We need get the updates and other changes in corporate network sometimes. Today, we turn off the DHCP server, set up to get an IP via DHCP (besides) and make our updates.
Problem: we do not want someone accidentally connect the laptop to the corporate network, while its DHCP server is running.
Question: so, if we go via wifi using a Cisco VPN client, the DHCP server IP addresses above the tunnel?
Thanks for reading.
N ° DHCP uses layer 2 broadcasts to disseminate IP addresses. Because your clients are connected via VPN, there is no contiguity of layer 2. The only way he would accidentally do it is if you have configured an address to support IP dhcp as one of your VPN clients on the network, which I imagine you wouldn't.
Tags: Cisco Security
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Name of the manufacturer... Cisco Systems Inc..
Product name... Cisco controller
Version of the product... 7.0.116.0
Bootloader Version... 1.0.1
Retrieving Image Version field... 6.0.182.0
Firmware version... Console USB 1.3, 1.6 Env FPGA, 1.27
Build Type....................................... DATA + WPS, LDPE(Cisco Controller) > show interface summary
Name interface Vlan Id IP port address Type Ap Mgr. Gu
EST
-------------------------------- ---- -------- --------------- ------- ------ --
1 301 10.255.255.30 dynamic guest no no
Management 1 100 172.17.1.30 static yes noservice-port s/o s/o 192.168.0.1 static no no
n/a n/a 10.0.0.1 no nonstatic virtual(Cisco Controller) > show wlan summary
Number of wireless LANs... 4
Profile WIFI WLAN ID name / name of the SSID status Interface
------- ------------------------------------- -------- --------------------
1 active LAN management
2 active Internet management
3 active active management management
4 comments comments enabled(Cisco Controller) > show dhcp detailed comments
Scope: comments
Enabled.......................................... Yes
Lease Time....................................... 86400 (1 day)
Pool Start....................................... 10.255.255.31
Pool End......................................... 10.255.255.254
Network.......................................... 10.255.255.0
Netmask.......................................... 255.255.255.0
Default routers... 10.255.255.1 0.0.0.0 0.0.0.0
DNS Domain.......................................
DNS.............................................. 8.8.8.8 8.8.4.4 0.0.0.0
NetBIOS name servers... 0.0.0.0 0.0.0.0 0.0.0.0(Cisco Controller) > show detailed interface management
... Management interface
MAC address... e8:b7:48:9 b: 84:20
IP Address....................................... 172.17.1.30
IP Netmask....................................... 255.255.255.0
IP Gateway....................................... 172.17.1.1
State IP NAT outside... People with disabilities
External IP NAT... 0.0.0.0
VLAN............................................. 100
Quarantine-vlan... 0
Active physical Port... 1
The primary physical Port... 1
Port of physical backup... Not configured
Primary DHCP server... 172.30.50.1
Secondary DHCP server... Not configured
Option DHCP 82... People with disabilities
ACL.............................................. Not configured
AP Manager....................................... Yes
Comments interface... NO.
L2 multicast... Activated(Cisco Controller) > show detailed comments from interface
Interface name... Comments
MAC address... e8:b7:48:9 b: 84:24
IP Address....................................... 10.255.255.30
IP Netmask....................................... 255.255.255.0
IP Gateway....................................... 10.255.255.1
State IP NAT outside... People with disabilities
External IP NAT... 0.0.0.0
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Quarantine-vlan... 0
Active physical Port... 1
The primary physical Port... 1
Port of physical backup... Not configured
Primary DHCP server... Not configured
Secondary DHCP server... Not configured
Option DHCP 82... People with disabilities
ACL.............................................. Not configured
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Comments interface... NO.
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MAC address of the client... 00:21: 6a: 9 c: 03:04
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AP MAC address... a0:cf:5 b: 00:49:c0
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Customer of the NAC OOB State... Access
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Connected to... dry 319
Channel.......................................... 36
IP Address....................................... 10.255.255.46< ip="" address="" assigned="" from="" the="" 'guest'="" interface="" or="" dhcp="" scope="" on="" the="">
Association ID... 1
Authentication algorithm... Open System
Reason code... 1
Status code... 0
Session timeout... 1800
Client CCX version... 4
Version of E2E customer... 1
QoS Level........................................ Silver
Beacon priority P 802,1... disabled
Support WMM... Activated
Power Save....................................... OFF
State of mobility... Local
County of movement mobility... 0
Complete security policy... Yes
State Policy Manager... RUN
Policy Manager rule created... Yes
ACL name... no
Status to apply ACL... Not available
Type of strategy... N/A
Encryption Cipher... None
Protection management framework... NO.
EAP Type......................................... Unknown
Data HARVEST-H switching... Central
H - HARVEST authentication... Central
Management of the interface...
VLAN............................................. 100< right="">
Quarantine VLAN... 0
Access VIRTUAL LAN... 100Well it's good news. At least you have to operate.
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Scott Fella
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