ipchains firewall and checkpoint

Posted on 2002-07-09
Last Modified: 2013-11-16
I have found that my ipchains firewall is blocking SecureRemote clients.  I can open the required ports I need to in order to let it through, but I am a bit confused as to what to do about IP Protocol 50.  I guess I am wondering, how do I allow it through an ipchains firewall?

After using a packet sniffer, I can see this traffic (PROTO050), however it does not seem to use a specific port.  In fact both the source and destinations do not include a port number.  I don't quite understand how it exits the computer via TCP/IP without using a port???  I would realy appreciate help as I just don't understand this.
Question by:barthalamu
LVL 51

Accepted Solution

ahoffmann earned 450 total points
ID: 7141527
ipchains -A forward -p 50 -d -i ippp0 -j ACCEPT
ipchains -A forward -p udp -d --dport 500 -i ippp0 -j ACCEPT
# assuming that your SecureRemote clients are at subnet

Author Comment

ID: 7141954
Thank you once again for your help!!

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There are many Password Managers (PM) out there to choose from. PM's can help with your password habits and routines, but they should not be a crutch you rely on too heavily. I also have an article for company/enterprise PM's.
This article will inform Clients about common and important expectations from the freelancers (Experts) who are looking at your Gig.
Sending a Secure fax is easy with eFax Corporate ( First, just open a new email message. In the To field, type your recipient's fax number You can even send a secure international fax — just include t…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now