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ISC2 ISSAP Exam - Topic 3 Question 111 Discussion

Which of the following ports must be opened on the firewall for the VPN connection using Point-to-Point Tunneling Protocol (PPTP)?
D) TCP port 1723
B) TCP port 443
A) TCP port 110
C) TCP port 5060

ISC2 ISSAP Exam - Topic 3 Question 111 Discussion

Actual exam question for ISC2's ISSAP exam
Question #: 111
Topic #: 3
[All ISSAP Questions]

Which of the following ports must be opened on the firewall for the VPN connection using Point-to-Point Tunneling Protocol (PPTP)?

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Suggested Answer: D

by Alton at Jan 26, 2026, 08:36 AM

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Nadine
8 hours ago
Same here! I always mix up the ports. But 1723 is definitely a must.
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Vicki
6 days ago
I'm nervous about this question. I hope I remember the ports correctly.
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Ceola
11 days ago
Yeah, and GRE protocol 47 too, right? Can't forget that!
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Lynelle
16 days ago
I think TCP port 1723 needs to be open. It's essential for PPTP.
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Virgina
2 months ago
I thought PPTP was outdated, why are we still using it?
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Nana
2 months ago
Totally agree, both ports are essential!
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Wilburn
2 months ago
Wait, are we sure GRE is necessary?
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Jacqueline
3 months ago
Don't forget about GRE protocol too!
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Raylene
3 months ago
You need to open port 1723 for PPTP.
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Ayesha
3 months ago
Haha, who doesn't know it's port 1723 for PPTP? Easy peasy!
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Tonette
3 months ago
Port 1723, no doubt about it.
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Daniel
3 months ago
Hmm, I'm pretty sure it's port 1723.
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Yolande
3 months ago
Definitely port 1723 for PPTP.
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Fannie
4 months ago
I think it's port 1723.
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Kiera
4 months ago
I’m a bit confused; I thought there were multiple ports for different VPN types, but PPTP seems straightforward with just one, right?
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Gilberto
4 months ago
I practiced a question like this before, and I believe it was just port 1723 for the PPTP connection.
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Shawna
5 months ago
I remember something about GRE protocol needing to be allowed too, but I can't recall the specifics.
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Kiley
5 months ago
I think PPTP typically uses TCP port 1723, but I’m not entirely sure if there are others involved.
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Gearldine
5 months ago
I've got this! PPTP uses port 1723 for the control channel, and also requires GRE (port 47) to be open. Time to put that networking knowledge to use.
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Paris
5 months ago
Ugh, firewall port questions are the worst. I'm going to have to review my VPN protocol knowledge before I can answer this confidently.
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Jarvis
5 months ago
Okay, let me see... PPTP, that's the older VPN protocol. I believe it uses a combination of ports, but I can't remember the exact ones off the top of my head.
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Cecilia
6 months ago
Hmm, I'm not totally sure about the specific port numbers for PPTP. I'll have to think this through carefully.
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Andra
6 months ago
I think I know the answer to this one. PPTP uses port 1723, right?
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