CoolInterview.com - World's Largest Collection of Interview Questions & Answers, FAQs, queries, sample papers, exam papers, dumps, what, why, how, where, when questions
Our Services
Get 9,000 Interview Questions & Answers in an eBook.




Get it now !!
Send your Resume to 6000 Companies

Search Interview Questions

Question: Can IP Masquerade work with only ONE Ethernet network card?

Answer: Yes and no. With the "IP Alias" kernel feature, users can setup multiple
aliased interfaces such as eth0:1, eth0:2, etc but its is NOT recommended to
use aliased interfaces for IP Masquerading. Why? Providing a secure firewall
becomes very difficult with a single NIC card. In addition to this, you will
experience an abnormal amount of errors on this link since incoming packets
will almost simultaneously be sent out at the same time. Because of all this
and NIC cards now costs less than $10, I highly recommend to just get a NIC
card for each MASQed network segment.

Users should also understand that IP Masquerading will only work with a
physical interface such as eth0, eth1, etc. MASQing out an aliased interface
such as "eth0:1, eth1:1, etc" will NOT work. In other words, the following
WILL NOT WORK reliably:

* It is rumored that you can simply use the destination IP address (the IP
address associated with the ALIASed interface like eth0:1, etc.) IN PLACE
of specifing the interface (eth0:1). This solution is not untested --
please email dranch@trinnet.net if you have any positive or negative
results

* /sbin/ipchains -A forward -i eth0:1 -s 192.168.0.0/24 -j MASQ"

* /sbin/ipfwadm -F -a m -W eth0:1 -S 192.168.0.0/24 -D 0.0.0.0/0




If you are still interested in using aliased interfaces, you need to enable
the "IP Alias" feature in the kernel. You will then need to re-compile and
reboot. Once running the new kernel, you need to configure Linux to use the
new interface (i.e. eth0:1, etc.). After that, you can treat it as a normal
Ethernet interface with some restrictions like the one above.



Category IP Masquerading Interview Questions & Answers - Exam Mode / Learning Mode
Rating (0.4) By 526 users
Added on 5/15/2014
Views 5353
Rate it!
Question: Can IP Masquerade work with only ONE Ethernet network card?

Answer:

Yes and no. With the "IP Alias" kernel feature, users can setup multiple
aliased interfaces such as eth0:1, eth0:2, etc but its is NOT recommended to
use aliased interfaces for IP Masquerading. Why? Providing a secure firewall
becomes very difficult with a single NIC card. In addition to this, you will
experience an abnormal amount of errors on this link since incoming packets
will almost simultaneously be sent out at the same time. Because of all this
and NIC cards now costs less than $10, I highly recommend to just get a NIC
card for each MASQed network segment.

Users should also understand that IP Masquerading will only work with a
physical interface such as eth0, eth1, etc. MASQing out an aliased interface
such as "eth0:1, eth1:1, etc" will NOT work. In other words, the following
WILL NOT WORK reliably:

* It is rumored that you can simply use the destination IP address (the IP
address associated with the ALIASed interface like eth0:1, etc.) IN PLACE
of specifing the interface (eth0:1). This solution is not untested --
please email dranch@trinnet.net if you have any positive or negative
results

* /sbin/ipchains -A forward -i eth0:1 -s 192.168.0.0/24 -j MASQ"

* /sbin/ipfwadm -F -a m -W eth0:1 -S 192.168.0.0/24 -D 0.0.0.0/0




If you are still interested in using aliased interfaces, you need to enable
the "IP Alias" feature in the kernel. You will then need to re-compile and
reboot. Once running the new kernel, you need to configure Linux to use the
new interface (i.e. eth0:1, etc.). After that, you can treat it as a normal
Ethernet interface with some restrictions like the one above.
Source: CoolInterview.com



If you have the better answer, then send it to us. We will display your answer after the approval

Rules to Post Answers in CoolInterview.com:-

  • There should not be any Spelling Mistakes.
  • There should not be any Gramatical Errors.
  • Answers must not contain any bad words.
  • Answers should not be the repeat of same answer, already approved.
  • Answer should be complete in itself.

Post your answer here

Inform me about updated answers to this question.
Related Questions
View Answer
Microsoft File and Print Sharing and Microsoft Domain clients don't work through IP Masq!

View Answer
Can I configure IP MASQ to allow Internet users to
directly contact internal MASQed servers?
View Answer
Configuring MacOS Based System Running Open Transport
View Answer
Assigning Private Network IP Addresses to the Internal LAN
View Answer
Compiling a new kernel if needed
View Answer
Requirements for IP Masquerade on Linux 2.4.x
View Answer
How does IP Masquerade Work?
View Answer
Who Doesn't Need IP Masquerade?
View Answer
Who Can Benefit From IP Masquerade?
View Answer
What is IP Masquerade?
View Answer

Please Note: We keep on updating better answers to this site. In case you are looking for Jobs, Pls Click Here Vyoms.com - Best Freshers & Experienced Jobs Website.

View All IP Masquerading Interview Questions & Answers - Exam Mode / Learning Mode




India News Network
Latest 20 Questions
Payment of time- barred debt is: (a) Valid (b) Void (c) Illegal (d) Voidable
Consideration is defined in the Indian Contract Act,1872 in: (a) Section 2(f) (b) Section 2(e) (c) Section 2(g) (d) Section 2(d)
Which of the following is not an exception to the rule, "No consideration, No contract": (a) Natural love and affection (b) Compensation for involuntary services (c) Completed gift (d) Agency
Consideration must move at the desire of: (a) The promisor (b) The promisee (c) The promisor or any other party (d) Both the promisor and the promisee
An offer which is open for acceptance over a period of time is: (a) Cross Offer (b) Counter Offer (c) Standing Offer (d) Implied Offer
Specific offer can be communicated to__________ (a) All the parties of contract (b) General public in universe (c) Specific person (d) None of the above
_________ amounts to rejection of the original offer. (a) Cross offer (b) Special offer (c) Standing offer (d) Counter offer
A advertises to sell his old car by advertising in a newspaper. This offer is caleed: (a) General Offer (b) Special Offer (c) Continuing Offer (d) None of the above
In case a counter offer is made, the original offer stands: (a) Rejected (b) Accepted automatically (c) Accepted subject to certain modifications and variations (d) None of the above
In case of unenforceable contract having some technical defect, parties (a) Can sue upon it (b) Cannot sue upon it (c) Should consider it to be illegal (d) None of the above
If entire specified goods is perished before entering into contract of sale, the contract is (a) Valid (b) Void (c) Voidable (d) Cancelled
______________ contracts are also caled contracts with executed consideration. (a) Unilateral (b) Completed (c) Bilateral (d) Executory
A offers B to supply books @ Rs 100 each but B accepts the same with condition of 10% discount. This is a case of (a) Counter Offer (b) Cross Offer (c) Specific Offer (d) General Offer
_____________ is a game of chance. (a) Conditional Contract (b) Contingent Contract (c) Wagering Contract (d) Quasi Contract
There is no binding contract in case of _______ as one's offer cannot be constructed as acceptance (a) Cross Offer (b) Standing Offer (c) Counter Offer (d) Special Offer
An offer is made with an intention to have negotiation from other party. This type of offer is: (a) Invitation to offer (b) Valid offer (c) Voidable (d) None of the above
When an offer is made to the world at large, it is ____________ offer. (a) Counter (b) Special (c) General (d) None of the above
Implied contract even if not in writing or express words is perfectly _______________ if all the conditions are satisfied:- (a) Void (b) Voidable (c) Valid (d) Illegal
A specific offer can be accepted by ___________. (a) Any person (b) Any friend to offeror (c) The person to whom it is made (d) Any friend of offeree
An agreement toput a fire on a person's car is a ______: (a) Legal (b) Voidable (c) Valid (d) Illegal
Cache = 0.703125 Seconds