one ISP 2 IP

JKnott

NETGATE
ADMINISTRATOR
5 minutes ago

Is it a static IP? Second dhcp lease?

Mine are DHCP. For some reason, the MTU is smaller on the 2nd.

stephenw10

No there's no benefit and in fact there's a good chance your ISP still requires you to pull a lease even if it passes you the same IP every time.

If both IPs really are fixed then you should be able to just add the second IP as an IPAlias VIP on WAN and use it however you want.

Antibiotic

@JKnott Can you set as static?and check MTU

Antibiotic

@stephenw10 said in one ISP 2 IP:

If both IPs really are fixed

Is it possible to check this on my side, without calling to ISP? Because I use as static and over DCHP and did not found any difference)))

Antibiotic

@stephenw10 said in one ISP 2 IP:

even if it passes you the same IP every time

20 YEARS , have the same IP))

stephenw10

Ha, well that's a long lease! The fact that it can use dhcp though implies the ISP could change it. They probably just default to the same IP unless there's a reason to change.

Are you spoofing the MAC address to keep that for 20yrs?

Antibiotic

@stephenw10 No, MAC address original from pfSense, when lets say me replacing my router to new one, my ISP automatically assign this new MAC to my IP that all)))Just appear web page from ISP , please wait a 3 mins and bingo)))

stephenw10

Mmm, well somehow assigned to your connection then. Potentially you might be able to use a static IP. The ISP would know but most ISPs are difficult to information from.

Antibiotic

@stephenw10 Idk, how they make this, appear a web page from my ISP, when I try to browsing, on this page should put my agreement number from my ISP and wait a few time , that all)))So , looks like it is full static ? Is it correct?

Antibiotic

@stephenw10 Also have a question, if set as static IP better set MTU and MSS manually on WAN and LAN in this case?

JKnott

@Antibiotic said in one ISP 2 IP:

@JKnott
about an hour ago

@JKnott Can you set as static?and check MTU

I haven't tried to set static and wouldn't without knowing an address that's outside the pool.

Antibiotic

@JKnott Is it better to set manually MTU and MSS on WAN and LAN?

stephenw10

MTU/MSS wouldn't really be affected.

Only way to know for sure if it will accept a static IP is to ask the ISP or try it and wait for it to fail.

Antibiotic

@stephenw10 When use static IP , its never fail. What I mean is possible to hardcoded MTU and MSS on WAN? and if yes should me also set MTU and MSS on LAN than?

stephenw10

The default value of 1500 should be fine whether it's static or DHCP. I would not expect to need to set it. On either interface.

Antibiotic

@stephenw10 Ok, thanks)))