12-28-2021 02:29 PM
Configuration snippets:
vlan 80 name untrusted by port
untagged ethe 3/1/3
ip access-group untrusted ininterface ve 80
ip address 192.168.80.2/24
ip access-list extended untrusted
enable accountingsequence 10 permit tcp any 192.168.0.0/16 established
sequence 20 permit icmp any any
sequence 30 permit udp any host 192.168.255.2 eq dns
sequence 40 permit tcp any host 192.168.255.2 eq dns
sequence 50 permit udp any host 192.168.255.1 eq ntp
sequence 60 permit tcp any host 192.168.64.113 eq ssl
sequence 70 deny tcp any 192.168.0.0/16
sequence 80 deny udp any 192.168.0.0/16sequence 90 permit tcp any any
sequence 100 permit udp any any
System attached to 3/1/3 has IP address 192.168.68.200/24, with its gateway set to 192.168.80.2.
With the above access-list that system is able to open TCP connections to 192.168.1.1, even though the initial SYN packet should not count as 'established'. If I remove the sequence 10 filter from the access-list, the system is no longer able to open such connections.
12-29-2021 10:23 AM
Yes, that's correct, that was a typo in the original post.
The goal here is to allow hosts on VLANs 88 and 89 to make connections to hosts on VLAN 80, but not allow the reverse. Because of that your proposed solution won't work, but I'll experiment with some other options and report back here.
Also, if someone could DM me about getting a support contract in place I'd appreciate that... I used the 'contact us' form some time ago to inquire about it but never got any response.
12-29-2021 10:35 AM
I tried using 'permit tcp 192.168.80.0/24 any established' to limit the source instead of the destination, but that didn't work... host 192.168.80.200 was stable to initiate TCP connections to hosts outside of VLAN 80.
I've got a workaround for this so I'm not blocked on it. Thanks for the help so far.
12-29-2021 10:41 AM
Hi Kevin,
Can you please email me your location and email and phone number to my email address: hashim.bharoocha@commscope.com I will have support team reach out to you.
Also you can try this link:
https://www.commscope.com/resources/how-to-buy/public-sector-procurement-contracts/
Thanks
Best Regards
Hashim