New Contributor
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2 Messages
Cannot get IPv4 connectivity but IPv6 works
New installation and have had a static IP assigned and have tech support configure the modem in the pass-thru mode. Have tried configuring with my firewall but was unable to get connectivity but assigning the Public IP to a network port on a laptop was able to get online but only to IPv6 sites.
Even checking on whatismyipaddress.com.
IPv6: ? 2603:3014:2b03:2400:f44e:df01:2fb3:4ee7
IPv4: ? Not detected
Comcast_ThomasC
Official Employee
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53 Messages
3 years ago
Hello @user_8b55e3! If you cannot connect to the server that is statically configured behind the IP Gateway, it may be because of these two reasons.
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user_8b55e3
New Contributor
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2 Messages
3 years ago
I think so but I cannot find any section for smart packet detection.
This is a cga4131com rev 2.3 comcast router.
Bridge Mode Disabled
DHCP is disabled
Firewall
IPv4
check Disable Firewall for True Static IP Subnet Only
unchecked Disable Ping on WAN interface
Custom Security
LAN-to-WAN : Allow all.
WAN-to-LAN : IDS Enabled and block as per selections below.
unchecked Block http (TCP port 80, 443)
unchecked Block ICMP
unchecked Block Multicast
unchecked Block Peer-to-peer applications
unchecked Block IDENT (port 113)
checked Disable entire firewall
IPv6
unchecked Disable Ping on WAN interface
Custom
LAN-to-WAN : Allow all.
WAN-to-LAN : IDS Enabled and block as per selections below.
unchecked Block http (TCP port 80, 443)
unchecked Block ICMP
unchecked Block Multicast
unchecked Block Peer-to-peer applications
unchecked Block IDENT (port 113)
checked Disable entire firewall
On my devices that I've used for testing I set the static IP and Gateway info in my IPv4 settings but the only IPv4 address I can reach is the comcast router on 10.1.10.1
ip 96.x.x.121
sub 255.255.255.252
gtw 96.x.x.122
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user_ac99f8
New Contributor
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7 Messages
3 years ago
This was resolved by Tier 2 support. Our static IPv4 address had been assigned to another modem.
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